From ceri.clatworthy at gmail.com  Wed May  6 16:37:43 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Wed, 6 May 2015 16:37:43 +0100
Subject: [Swansea Hackspace] Hackers poster
Message-ID: <CAO=DJn8MV--c6W9ESE_EWNjHREX4A+a_E6XUOYUCtGDwCfVsMg@mail.gmail.com>

Just had a look for a poster, to put in a few strategic places,

Can't seem to find one, found stuff for swamp fest,
and some business cards,

But no poster.

Is there one ?? (approved)


Cheers

Ceri
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From justin at swansea.hackspace.org.uk  Wed May  6 20:41:48 2015
From: justin at swansea.hackspace.org.uk (Justin Mitchell)
Date: Wed, 06 May 2015 20:41:48 +0100
Subject: [Swansea Hackspace] Hackers poster
In-Reply-To: <CAO=DJn8MV--c6W9ESE_EWNjHREX4A+a_E6XUOYUCtGDwCfVsMg@mail.gmail.com>
References: <CAO=DJn8MV--c6W9ESE_EWNjHREX4A+a_E6XUOYUCtGDwCfVsMg@mail.gmail.com>
Message-ID: <1430941308.30328.2.camel@emerald.geode.org.uk>

On Wed, 2015-05-06 at 16:37 +0100, Ceri Clatworthy wrote:
> Just had a look for a poster, to put in a few strategic places, 
> 
> 
> Can't seem to find one, found stuff for swamp fest,
> and some business cards,
> 
> 
> But no poster.
> 
> 
> Is there one ?? (approved)

No, this is something that really needs doing.

but it needs doing by someone that's actually good at graphic design,
unlike my previous attempts.

Once we have a good design then we need members to go and find
interesting places to put them to spread the word.





From paul at harwood-leon.com  Wed May  6 20:46:05 2015
From: paul at harwood-leon.com (Paul Harwood)
Date: Wed, 6 May 2015 20:46:05 +0100
Subject: [Swansea Hackspace] Hackers poster
In-Reply-To: <1430941308.30328.2.camel@emerald.geode.org.uk>
References: <CAO=DJn8MV--c6W9ESE_EWNjHREX4A+a_E6XUOYUCtGDwCfVsMg@mail.gmail.com>
	<1430941308.30328.2.camel@emerald.geode.org.uk>
Message-ID: <171D6228-62C2-4367-AECF-E10EBD1D075C@harwood-leon.com>

If someone can give us a hand to get the hallway screens working, pretty trivial job - we can do a skill swap for designing the posters.

? Paul

> On 6 May 2015, at 20:41, Justin Mitchell <justin at swansea.hackspace.org.uk> wrote:
> 
> On Wed, 2015-05-06 at 16:37 +0100, Ceri Clatworthy wrote:
>> Just had a look for a poster, to put in a few strategic places, 
>> 
>> 
>> Can't seem to find one, found stuff for swamp fest,
>> and some business cards,
>> 
>> 
>> But no poster.
>> 
>> 
>> Is there one ?? (approved)
> 
> No, this is something that really needs doing.
> 
> but it needs doing by someone that's actually good at graphic design,
> unlike my previous attempts.
> 
> Once we have a good design then we need members to go and find
> interesting places to put them to spread the word.
> 
> 
> 
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace



From timmoore47 at gmail.com  Fri May  8 17:58:56 2015
From: timmoore47 at gmail.com (Tim Moore)
Date: Fri, 8 May 2015 17:58:56 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
	stepper motor.
In-Reply-To: <CAO=DJn90igwUPOBr5K4c9c-ioPmPrx=oC4nU0sbSdajy-bXHiA@mail.gmail.com>
References: <CAAEY5oOPDcZP3_OT6swXr7nEOHcVEmBnycCYnKJZGX_j7EfN6g@mail.gmail.com>
	<77cee00f-d08d-44bc-83f3-403b60b4bf66@email.android.com>
	<CAAEY5oM-kSvwXVPQNovDC_betjtgq7wy_1f1e7eHRDWSWW-xUQ@mail.gmail.com>
	<1429383539.17143.1.camel@emerald.geode.org.uk>
	<CAAEY5oPyCjrL6yO7NFVWY+YG2pEpwJOpM=2_B9jHNxp3fZNQKQ@mail.gmail.com>
	<CAAEY5oOERWHq9hZrhqyC8-h-+RPUmYqECWqYqR+cXBBfaocS-Q@mail.gmail.com>
	<CAAEY5oNusbtHrpCRAORDFYgKuvEy7UMSeowjPRKim7r33umSEw@mail.gmail.com>
	<CAO=DJn90igwUPOBr5K4c9c-ioPmPrx=oC4nU0sbSdajy-bXHiA@mail.gmail.com>
Message-ID: <CAAEY5oNAx_gUzHX_N7vdyg5twW=2cU-YyhkauC9QUZUdhewRiA@mail.gmail.com>

Well made sort of progress:-

Got a 3D stepper type   17H16-2994S  in the hope it would be powerful
enough to drive the thing I want to rotate.

Based on an Arduino Uno with a L298N stepper controller,

I found this software which I adapted for just one motor.

quote

// connect motor controller pins to Arduino digital pins
// motor one
int enA = 10;
int in1 = 9;
int in2 = 8;
// motor two
// int enB = 5;
// int in3 = 7;
// int in4 = 6;
void setup()
{
  // set all the motor control pins to outputs
  pinMode(enA, OUTPUT);
  // pinMode(enB, OUTPUT);
  pinMode(in1, OUTPUT);
  pinMode(in2, OUTPUT);
  // pinMode(in3, OUTPUT);
  // pinMode(in4, OUTPUT);
}
void demoOne()
{
  // this function will run the motors in both directions at a fixed speed
  // turn on motor A
  digitalWrite(in1, HIGH);
  digitalWrite(in2, LOW);
  // set speed to 200 out of possible range 0~255
  analogWrite(enA, 200);
  // turn on motor B
  // digitalWrite(in3, HIGH);
  // digitalWrite(in4, LOW);
  // set speed to 200 out of possible range 0~255
  // analogWrite(enB, 200);
  delay(2000);
  // now change motor directions
  digitalWrite(in1, LOW);
  digitalWrite(in2, HIGH);
  // digitalWrite(in3, LOW);
  // digitalWrite(in4, HIGH);
  //delay(2000);
  // now turn off motors
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);
  // digitalWrite(in3, LOW);
  // digitalWrite(in4, LOW);
}
void demoTwo()
{
  // this function will run the motors across the range of possible speeds
  // note that maximum speed is determined by the motor itself and the
operating voltage
  // the PWM values sent by analogWrite() are fractions of the maximum
speed possible
  // by your hardware
  // turn on motors
  digitalWrite(in1, LOW);
  digitalWrite(in2, HIGH);
  // digitalWrite(in3, LOW);
  // digitalWrite(in4, HIGH);
  // accelerate from zero to maximum speed
  for (int i = 0; i < 256; i++)
  {
    analogWrite(enA, i);
    // analogWrite(enB, i);
    delay(20);
  }
  // decelerate from maximum speed to zero
  for (int i = 255; i >= 0; --i)
  {
    analogWrite(enA, i);
    // analogWrite(enB, i);
    delay(20);
  }
  // now turn off motors
  digitalWrite(in1, LOW);
  digitalWrite(in2, LOW);
  // digitalWrite(in3, LOW);
  // digitalWrite(in4, LOW);
}
void loop()
{
  demoOne();
  delay(1000);
  demoTwo();
  delay(1000);
}


Wired it all up with a 12V 5A power supply and the stepper shaft twitched a
bit , but the L298N emitted a puff of smoke and the heatsink got very hot !

Now I've checked the Arduino Uno and it seems aok.

The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor pin,
ditto earth to nearest pin.

Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft stops
being rotatable.  the two motor wires are at infinity.

I've assumed that's a sign that I've not killed the stepper motor.

Now before I get another L298N, I thought a few precautions are worth while
!  Slaying a series of L298N's doesn't seem that smart !!!  *LOL*

Any thoughts from anyone as to what to investigate next ?  (I thought
perhaps the software was wrong for this model of stepper motor ?  I'm
capable of making crass errors here..)

:  )

Tim_1

On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com>
wrote:

> Reverse. ..
>
> If ULN 2003...
> The wiggle pins in other direction! !!
> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
>
>> Many thanks Ceri for the tip !  Greatly appreciated !
>>
>> :  )))
>>
>> Tim_1
>>
>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
>>
>>> Update:-
>>>
>>> It may not be very riveting but the change to 6400 (and the deletion of
>>> */ at the top of the code worked fine !
>>>
>>> the count for
>>> 90  deg was 500  and  time 52.5 secs
>>> 180 deg was 1000             105
>>> 270 deg was 1500             157.5
>>> 360 deg was 2000             210 secs ( 3m 30 secs)  approx
>>>
>>> (I hope !)
>>>
>>> Now this might be very boring, but it also might help a Newbie to
>>> stepper motors test their new purchase out too !
>>>
>>> Anyone know if the controller board can make it go in reverse ?
>>>
>>> :  )))
>>>
>>> Tim_1
>>>
>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
>>>
>>>> I've been trying to get this working on a   28BYJ-48 with ULN2003
>>>> cheapest stepper motor set up.
>>>>
>>>>  Created 30 Nov. 2009
>>>>  by Tom Igoe
>>>>
>>>>  */
>>>>
>>>> #include <Stepper.h>
>>>>
>>>> const int stepsPerRevolution = 1440;  // change this to fit the number
>>>> of steps per revolution
>>>>                                      // for your motor
>>>>
>>>> // initialize the stepper library on pins 8 through 11:
>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);
>>>>
>>>> int stepCount = 0;         // number of steps the motor has taken
>>>>
>>>> void setup() {
>>>>   // initialize the serial port:
>>>>   Serial.begin(9600);
>>>> }
>>>>
>>>> void loop() {
>>>>   // step one step:
>>>>   myStepper.step(1);
>>>>   Serial.print("steps:" );
>>>>   Serial.println(stepCount);
>>>>   stepCount++;
>>>>   delay(100);
>>>> }
>>>>
>>>>
>>>> Spec:-
>>>>
>>>>
>>>>
>>>>    -
>>>>    - Voltage : 5V
>>>>    - Diameter : 28mm
>>>>    - Step angle : 5.625 x 1 / 64
>>>>    - Reduction ratio : 1 / 64
>>>>    - 5 Line 4 phase
>>>>    - Current draw : 92mA
>>>>    - Operating Frequency : 100pps
>>>>    - Dimensions : 35mm x 28mm
>>>>    - 4 mounting holes
>>>>    - ULN2003 chip
>>>>    - A, B, C, D four-phase status LED
>>>>
>>>> ___
>>>>
>>>>
>>>> Now the divide by 64 seems to be a stumbling block ?
>>>>
>>>> What I'm trying to do is use the 1.8 degree characteristic to get 100
>>>> pulses to achieve a total rotation of 180 degrees to the shaft.
>>>>
>>>> A period of anything up to two minutes is fine for the 180 degree
>>>> rotation.
>>>>
>>>> So far it twitches a bit but not much else e.g. not very exciting.
>>>>
>>>> Should the   stepsPerRevolution = 1440 be changed to stepsPerRevolution
>>>> = 6400 ?
>>>>
>>>> Maybe I've got the Arduino pins a tad wrong ?
>>>>
>>>> :  )
>>>>
>>>>
>>>> Tim_1
>>>>
>>>>
>>>>
>>>> On 18 April 2015 at 19:58, Justin Mitchell <
>>>> justin at swansea.hackspace.org.uk> wrote:
>>>>
>>>>> Yes, one motor one step-stick.
>>>>>
>>>>> Control it from an arduino, or any other micro, just needs two GPIO
>>>>> lines.
>>>>>
>>>>>
>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
>>>>> > So a single 'step-stick' would do it ?
>>>>> >
>>>>> >
>>>>> > Many thanks for responding !
>>>>> >
>>>>> > :  )))
>>>>> >
>>>>> >
>>>>> > Tim_1
>>>>> >
>>>>> >
>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <justin at discordia.org.uk>
>>>>> > wrote:
>>>>> >         It's an interface for all the stuff you need to drive a 3d
>>>>> >         printer, takes 5 step-sticks for stepper driving, has power
>>>>> >         MOSFETs to pwm the hotends and heated bed, and a bunch of
>>>>> >         inputs for end stops and thermistors. You plug it into an
>>>>> >         Arduino mega board, install some software like Marlin and it
>>>>> >         can run your printer, or mixed to control a CNC mill or laser
>>>>> >         cutter.
>>>>> >
>>>>> >         Way over kill for driving one motor :)
>>>>> >
>>>>> >         On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com>
>>>>> >         wrote:
>>>>> >         >
>>>>> >         > Wow !  Loads of interesting links and ideas !
>>>>> >         >
>>>>> >         > Its a very slow rotation, so inertia is not a problem.
>>>>> >         >
>>>>> >         > Is a 'RAMPS 1.4' useful ?  what does it do ?
>>>>> >         >
>>>>> >         > Many thanks to all who have responded !
>>>>> >         >
>>>>> >         > :  )))
>>>>> >         >
>>>>> >         > Tim_1
>>>>> >         >
>>>>> >         > On 18 April 2015 at 13:57, oliver Oliver
>>>>> >         <oliver at oliverjenkins.com> wrote:
>>>>> >         >>
>>>>> >         >> Think about pulleys or gears.  I don't know if you want
>>>>> the
>>>>> >         pole to stop at a particular point or not.  Inertia in 1m
>>>>> pole
>>>>> >         will be higher than braking force of a stepper motor.  So it
>>>>> >         will continue to spin after you stop the motor. Giving you an
>>>>> >         unpredictable 180 plus rotation.
>>>>> >         >>
>>>>> >         >> For a pulley arrangement look at t5  timing belts.  you
>>>>> can
>>>>> >         easily print the pulleys using a reprap.  There are libraries
>>>>> >         on thingiverse.
>>>>> >         >>
>>>>> >         >> A worm gear would be better,  but you can't print those.
>>>>> >         >>
>>>>> >         >> Oli
>>>>> >         >>
>>>>> >         >> On 18 Apr 2015 12:33, "Tim Moore" <timmoore47 at gmail.com>
>>>>> >         wrote:
>>>>> >         >>>
>>>>> >         >>> I'm trying to carefully rorate a metre long light weight
>>>>> >         pole through 180 degrees.
>>>>> >         >>>
>>>>> >         >>> I've got a Stepper Motor type 28BYJ-48 working fine, but
>>>>> >         I'm sure I need one that is a bit more chunky !
>>>>> >         >>>
>>>>> >         >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high torque
>>>>> >         1.8 degree stepper motor  on the way with a controller card
>>>>> >         >>>
>>>>> >         >>> But I've not got a very clear vision yet what else I
>>>>> might
>>>>> >         need and if there is any Arduino example software listing
>>>>> that
>>>>> >         would be good to use to get it to work ?
>>>>> >         >>>
>>>>> >         >>> I don't want to reinvent the wheel !  *LOL*
>>>>> >         >>>
>>>>> >         >>> Any thoughts anyone ?
>>>>> >         >>>
>>>>> >         >>> :  )))
>>>>> >         >>>
>>>>> >         >>> Tim_1
>>>>> >         >>>
>>>>> >         >>> _______________________________________________
>>>>> >         >>> Hackspace mailing list
>>>>> >         >>> Hackspace at swansea.hackspace.org.uk
>>>>> >         >>>
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>> >         >>>
>>>>> >         >>
>>>>> >         >> _______________________________________________
>>>>> >         >> Hackspace mailing list
>>>>> >         >> Hackspace at swansea.hackspace.org.uk
>>>>> >         >>
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>> >         >>
>>>>> >         >
>>>>> >         _______________________________________________
>>>>> >         Hackspace mailing list
>>>>> >         Hackspace at swansea.hackspace.org.uk
>>>>> >         http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>> >
>>>>> >
>>>>> >
>>>>> > _______________________________________________
>>>>> > Hackspace mailing list
>>>>> > Hackspace at swansea.hackspace.org.uk
>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>
>>>>
>>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From ceri.clatworthy at gmail.com  Fri May  8 22:03:23 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Fri, 8 May 2015 22:03:23 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
	stepper motor.
In-Reply-To: <CAAEY5oNAx_gUzHX_N7vdyg5twW=2cU-YyhkauC9QUZUdhewRiA@mail.gmail.com>
References: <CAAEY5oOPDcZP3_OT6swXr7nEOHcVEmBnycCYnKJZGX_j7EfN6g@mail.gmail.com>
	<77cee00f-d08d-44bc-83f3-403b60b4bf66@email.android.com>
	<CAAEY5oM-kSvwXVPQNovDC_betjtgq7wy_1f1e7eHRDWSWW-xUQ@mail.gmail.com>
	<1429383539.17143.1.camel@emerald.geode.org.uk>
	<CAAEY5oPyCjrL6yO7NFVWY+YG2pEpwJOpM=2_B9jHNxp3fZNQKQ@mail.gmail.com>
	<CAAEY5oOERWHq9hZrhqyC8-h-+RPUmYqECWqYqR+cXBBfaocS-Q@mail.gmail.com>
	<CAAEY5oNusbtHrpCRAORDFYgKuvEy7UMSeowjPRKim7r33umSEw@mail.gmail.com>
	<CAO=DJn90igwUPOBr5K4c9c-ioPmPrx=oC4nU0sbSdajy-bXHiA@mail.gmail.com>
	<CAAEY5oNAx_gUzHX_N7vdyg5twW=2cU-YyhkauC9QUZUdhewRiA@mail.gmail.com>
Message-ID: <CAO=DJn8C=sYB6NTJ_cqs5j0EBC2qpsRKyGB7b7rmsHH=opV6xQ@mail.gmail.com>

Fetch in in Monday an we will get it going

Unless the magic blue smoke has been released
Ceri
On 8 May 2015 17:59, "Tim Moore" <timmoore47 at gmail.com> wrote:

> Well made sort of progress:-
>
> Got a 3D stepper type   17H16-2994S  in the hope it would be powerful
> enough to drive the thing I want to rotate.
>
> Based on an Arduino Uno with a L298N stepper controller,
>
> I found this software which I adapted for just one motor.
>
> quote
>
> // connect motor controller pins to Arduino digital pins
> // motor one
> int enA = 10;
> int in1 = 9;
> int in2 = 8;
> // motor two
> // int enB = 5;
> // int in3 = 7;
> // int in4 = 6;
> void setup()
> {
>   // set all the motor control pins to outputs
>   pinMode(enA, OUTPUT);
>   // pinMode(enB, OUTPUT);
>   pinMode(in1, OUTPUT);
>   pinMode(in2, OUTPUT);
>   // pinMode(in3, OUTPUT);
>   // pinMode(in4, OUTPUT);
> }
> void demoOne()
> {
>   // this function will run the motors in both directions at a fixed speed
>   // turn on motor A
>   digitalWrite(in1, HIGH);
>   digitalWrite(in2, LOW);
>   // set speed to 200 out of possible range 0~255
>   analogWrite(enA, 200);
>   // turn on motor B
>   // digitalWrite(in3, HIGH);
>   // digitalWrite(in4, LOW);
>   // set speed to 200 out of possible range 0~255
>   // analogWrite(enB, 200);
>   delay(2000);
>   // now change motor directions
>   digitalWrite(in1, LOW);
>   digitalWrite(in2, HIGH);
>   // digitalWrite(in3, LOW);
>   // digitalWrite(in4, HIGH);
>   //delay(2000);
>   // now turn off motors
>   digitalWrite(in1, LOW);
>   digitalWrite(in2, LOW);
>   // digitalWrite(in3, LOW);
>   // digitalWrite(in4, LOW);
> }
> void demoTwo()
> {
>   // this function will run the motors across the range of possible speeds
>   // note that maximum speed is determined by the motor itself and the
> operating voltage
>   // the PWM values sent by analogWrite() are fractions of the maximum
> speed possible
>   // by your hardware
>   // turn on motors
>   digitalWrite(in1, LOW);
>   digitalWrite(in2, HIGH);
>   // digitalWrite(in3, LOW);
>   // digitalWrite(in4, HIGH);
>   // accelerate from zero to maximum speed
>   for (int i = 0; i < 256; i++)
>   {
>     analogWrite(enA, i);
>     // analogWrite(enB, i);
>     delay(20);
>   }
>   // decelerate from maximum speed to zero
>   for (int i = 255; i >= 0; --i)
>   {
>     analogWrite(enA, i);
>     // analogWrite(enB, i);
>     delay(20);
>   }
>   // now turn off motors
>   digitalWrite(in1, LOW);
>   digitalWrite(in2, LOW);
>   // digitalWrite(in3, LOW);
>   // digitalWrite(in4, LOW);
> }
> void loop()
> {
>   demoOne();
>   delay(1000);
>   demoTwo();
>   delay(1000);
> }
>
>
> Wired it all up with a 12V 5A power supply and the stepper shaft twitched
> a bit , but the L298N emitted a puff of smoke and the heatsink got very hot
> !
>
> Now I've checked the Arduino Uno and it seems aok.
>
> The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor pin,
> ditto earth to nearest pin.
>
> Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft stops
> being rotatable.  the two motor wires are at infinity.
>
> I've assumed that's a sign that I've not killed the stepper motor.
>
> Now before I get another L298N, I thought a few precautions are worth
> while !  Slaying a series of L298N's doesn't seem that smart !!!  *LOL*
>
> Any thoughts from anyone as to what to investigate next ?  (I thought
> perhaps the software was wrong for this model of stepper motor ?  I'm
> capable of making crass errors here..)
>
> :  )
>
> Tim_1
>
> On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com>
> wrote:
>
>> Reverse. ..
>>
>> If ULN 2003...
>> The wiggle pins in other direction! !!
>> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>
>>> Many thanks Ceri for the tip !  Greatly appreciated !
>>>
>>> :  )))
>>>
>>> Tim_1
>>>
>>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
>>>
>>>> Update:-
>>>>
>>>> It may not be very riveting but the change to 6400 (and the deletion of
>>>> */ at the top of the code worked fine !
>>>>
>>>> the count for
>>>> 90  deg was 500  and  time 52.5 secs
>>>> 180 deg was 1000             105
>>>> 270 deg was 1500             157.5
>>>> 360 deg was 2000             210 secs ( 3m 30 secs)  approx
>>>>
>>>> (I hope !)
>>>>
>>>> Now this might be very boring, but it also might help a Newbie to
>>>> stepper motors test their new purchase out too !
>>>>
>>>> Anyone know if the controller board can make it go in reverse ?
>>>>
>>>> :  )))
>>>>
>>>> Tim_1
>>>>
>>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>
>>>>> I've been trying to get this working on a   28BYJ-48 with ULN2003
>>>>> cheapest stepper motor set up.
>>>>>
>>>>>  Created 30 Nov. 2009
>>>>>  by Tom Igoe
>>>>>
>>>>>  */
>>>>>
>>>>> #include <Stepper.h>
>>>>>
>>>>> const int stepsPerRevolution = 1440;  // change this to fit the number
>>>>> of steps per revolution
>>>>>                                      // for your motor
>>>>>
>>>>> // initialize the stepper library on pins 8 through 11:
>>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);
>>>>>
>>>>> int stepCount = 0;         // number of steps the motor has taken
>>>>>
>>>>> void setup() {
>>>>>   // initialize the serial port:
>>>>>   Serial.begin(9600);
>>>>> }
>>>>>
>>>>> void loop() {
>>>>>   // step one step:
>>>>>   myStepper.step(1);
>>>>>   Serial.print("steps:" );
>>>>>   Serial.println(stepCount);
>>>>>   stepCount++;
>>>>>   delay(100);
>>>>> }
>>>>>
>>>>>
>>>>> Spec:-
>>>>>
>>>>>
>>>>>
>>>>>    -
>>>>>    - Voltage : 5V
>>>>>    - Diameter : 28mm
>>>>>    - Step angle : 5.625 x 1 / 64
>>>>>    - Reduction ratio : 1 / 64
>>>>>    - 5 Line 4 phase
>>>>>    - Current draw : 92mA
>>>>>    - Operating Frequency : 100pps
>>>>>    - Dimensions : 35mm x 28mm
>>>>>    - 4 mounting holes
>>>>>    - ULN2003 chip
>>>>>    - A, B, C, D four-phase status LED
>>>>>
>>>>> ___
>>>>>
>>>>>
>>>>> Now the divide by 64 seems to be a stumbling block ?
>>>>>
>>>>> What I'm trying to do is use the 1.8 degree characteristic to get 100
>>>>> pulses to achieve a total rotation of 180 degrees to the shaft.
>>>>>
>>>>> A period of anything up to two minutes is fine for the 180 degree
>>>>> rotation.
>>>>>
>>>>> So far it twitches a bit but not much else e.g. not very exciting.
>>>>>
>>>>> Should the   stepsPerRevolution = 1440 be changed to stepsPerRevolution
>>>>> = 6400 ?
>>>>>
>>>>> Maybe I've got the Arduino pins a tad wrong ?
>>>>>
>>>>> :  )
>>>>>
>>>>>
>>>>> Tim_1
>>>>>
>>>>>
>>>>>
>>>>> On 18 April 2015 at 19:58, Justin Mitchell <
>>>>> justin at swansea.hackspace.org.uk> wrote:
>>>>>
>>>>>> Yes, one motor one step-stick.
>>>>>>
>>>>>> Control it from an arduino, or any other micro, just needs two GPIO
>>>>>> lines.
>>>>>>
>>>>>>
>>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
>>>>>> > So a single 'step-stick' would do it ?
>>>>>> >
>>>>>> >
>>>>>> > Many thanks for responding !
>>>>>> >
>>>>>> > :  )))
>>>>>> >
>>>>>> >
>>>>>> > Tim_1
>>>>>> >
>>>>>> >
>>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <justin at discordia.org.uk
>>>>>> >
>>>>>> > wrote:
>>>>>> >         It's an interface for all the stuff you need to drive a 3d
>>>>>> >         printer, takes 5 step-sticks for stepper driving, has power
>>>>>> >         MOSFETs to pwm the hotends and heated bed, and a bunch of
>>>>>> >         inputs for end stops and thermistors. You plug it into an
>>>>>> >         Arduino mega board, install some software like Marlin and it
>>>>>> >         can run your printer, or mixed to control a CNC mill or
>>>>>> laser
>>>>>> >         cutter.
>>>>>> >
>>>>>> >         Way over kill for driving one motor :)
>>>>>> >
>>>>>> >         On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com>
>>>>>> >         wrote:
>>>>>> >         >
>>>>>> >         > Wow !  Loads of interesting links and ideas !
>>>>>> >         >
>>>>>> >         > Its a very slow rotation, so inertia is not a problem.
>>>>>> >         >
>>>>>> >         > Is a 'RAMPS 1.4' useful ?  what does it do ?
>>>>>> >         >
>>>>>> >         > Many thanks to all who have responded !
>>>>>> >         >
>>>>>> >         > :  )))
>>>>>> >         >
>>>>>> >         > Tim_1
>>>>>> >         >
>>>>>> >         > On 18 April 2015 at 13:57, oliver Oliver
>>>>>> >         <oliver at oliverjenkins.com> wrote:
>>>>>> >         >>
>>>>>> >         >> Think about pulleys or gears.  I don't know if you want
>>>>>> the
>>>>>> >         pole to stop at a particular point or not.  Inertia in 1m
>>>>>> pole
>>>>>> >         will be higher than braking force of a stepper motor.  So it
>>>>>> >         will continue to spin after you stop the motor. Giving you
>>>>>> an
>>>>>> >         unpredictable 180 plus rotation.
>>>>>> >         >>
>>>>>> >         >> For a pulley arrangement look at t5  timing belts.  you
>>>>>> can
>>>>>> >         easily print the pulleys using a reprap.  There are
>>>>>> libraries
>>>>>> >         on thingiverse.
>>>>>> >         >>
>>>>>> >         >> A worm gear would be better,  but you can't print those.
>>>>>> >         >>
>>>>>> >         >> Oli
>>>>>> >         >>
>>>>>> >         >> On 18 Apr 2015 12:33, "Tim Moore" <timmoore47 at gmail.com>
>>>>>> >         wrote:
>>>>>> >         >>>
>>>>>> >         >>> I'm trying to carefully rorate a metre long light weight
>>>>>> >         pole through 180 degrees.
>>>>>> >         >>>
>>>>>> >         >>> I've got a Stepper Motor type 28BYJ-48 working fine, but
>>>>>> >         I'm sure I need one that is a bit more chunky !
>>>>>> >         >>>
>>>>>> >         >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high torque
>>>>>> >         1.8 degree stepper motor  on the way with a controller card
>>>>>> >         >>>
>>>>>> >         >>> But I've not got a very clear vision yet what else I
>>>>>> might
>>>>>> >         need and if there is any Arduino example software listing
>>>>>> that
>>>>>> >         would be good to use to get it to work ?
>>>>>> >         >>>
>>>>>> >         >>> I don't want to reinvent the wheel !  *LOL*
>>>>>> >         >>>
>>>>>> >         >>> Any thoughts anyone ?
>>>>>> >         >>>
>>>>>> >         >>> :  )))
>>>>>> >         >>>
>>>>>> >         >>> Tim_1
>>>>>> >         >>>
>>>>>> >         >>> _______________________________________________
>>>>>> >         >>> Hackspace mailing list
>>>>>> >         >>> Hackspace at swansea.hackspace.org.uk
>>>>>> >         >>>
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>> >         >>>
>>>>>> >         >>
>>>>>> >         >> _______________________________________________
>>>>>> >         >> Hackspace mailing list
>>>>>> >         >> Hackspace at swansea.hackspace.org.uk
>>>>>> >         >>
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>> >         >>
>>>>>> >         >
>>>>>> >         _______________________________________________
>>>>>> >         Hackspace mailing list
>>>>>> >         Hackspace at swansea.hackspace.org.uk
>>>>>> >         http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > _______________________________________________
>>>>>> > Hackspace mailing list
>>>>>> > Hackspace at swansea.hackspace.org.uk
>>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Hackspace mailing list
>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From djdavies83 at hotmail.com  Fri May  8 22:14:44 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Fri, 8 May 2015 22:14:44 +0100
Subject: [Swansea Hackspace] CHIP, world's first $9 computer
Message-ID: <DUB406-EAS39406199E2B5D83FD4AAFDC6DE0@phx.gbl>

Has anyone seen this thing? It's storming it's way passed the funding goal....


https://www.kickstarter.com/projects/1598272670/chip-the-worlds-first-9-computer

I was about to pledge for a single CHIP but shipping pushes the price to $29, there is a pledge for Kernel hackers only which gives the pocket chip, a pre-release alfa chips and 10 regular CHIPs.

I'm sure there is at least one kernel hacker in our midst, if so, shall we club together for that pledge??

If we can do something really smart with Kernel or projects we may even wind up with some publicity.


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.
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From timmoore47 at gmail.com  Sat May  9 07:09:10 2015
From: timmoore47 at gmail.com (Tim Moore)
Date: Sat, 9 May 2015 07:09:10 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
	stepper motor.
In-Reply-To: <CAO=DJn8C=sYB6NTJ_cqs5j0EBC2qpsRKyGB7b7rmsHH=opV6xQ@mail.gmail.com>
References: <CAAEY5oOPDcZP3_OT6swXr7nEOHcVEmBnycCYnKJZGX_j7EfN6g@mail.gmail.com>
	<77cee00f-d08d-44bc-83f3-403b60b4bf66@email.android.com>
	<CAAEY5oM-kSvwXVPQNovDC_betjtgq7wy_1f1e7eHRDWSWW-xUQ@mail.gmail.com>
	<1429383539.17143.1.camel@emerald.geode.org.uk>
	<CAAEY5oPyCjrL6yO7NFVWY+YG2pEpwJOpM=2_B9jHNxp3fZNQKQ@mail.gmail.com>
	<CAAEY5oOERWHq9hZrhqyC8-h-+RPUmYqECWqYqR+cXBBfaocS-Q@mail.gmail.com>
	<CAAEY5oNusbtHrpCRAORDFYgKuvEy7UMSeowjPRKim7r33umSEw@mail.gmail.com>
	<CAO=DJn90igwUPOBr5K4c9c-ioPmPrx=oC4nU0sbSdajy-bXHiA@mail.gmail.com>
	<CAAEY5oNAx_gUzHX_N7vdyg5twW=2cU-YyhkauC9QUZUdhewRiA@mail.gmail.com>
	<CAO=DJn8C=sYB6NTJ_cqs5j0EBC2qpsRKyGB7b7rmsHH=opV6xQ@mail.gmail.com>
Message-ID: <CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>

Magic blue smoke was released !  :  (((   So I've ordered another from
China.

I'll double check everything, as H configuration can short +12V to ground
so easily !   Software can do that ! ?

On another matter the L298N has two little cans marked '220 35V UT',  I've
pnly recently come across them.  What are they ?

Is there any favoured software to drive them that is known to work Arduino
friendly?

Many many thanks for responding !

:  )))

Tim_1

On 8 May 2015 at 22:03, Ceri Clatworthy <ceri.clatworthy at gmail.com> wrote:

> Fetch in in Monday an we will get it going
>
> Unless the magic blue smoke has been released
> Ceri
> On 8 May 2015 17:59, "Tim Moore" <timmoore47 at gmail.com> wrote:
>
>> Well made sort of progress:-
>>
>> Got a 3D stepper type   17H16-2994S  in the hope it would be powerful
>> enough to drive the thing I want to rotate.
>>
>> Based on an Arduino Uno with a L298N stepper controller,
>>
>> I found this software which I adapted for just one motor.
>>
>> quote
>>
>> // connect motor controller pins to Arduino digital pins
>> // motor one
>> int enA = 10;
>> int in1 = 9;
>> int in2 = 8;
>> // motor two
>> // int enB = 5;
>> // int in3 = 7;
>> // int in4 = 6;
>> void setup()
>> {
>>   // set all the motor control pins to outputs
>>   pinMode(enA, OUTPUT);
>>   // pinMode(enB, OUTPUT);
>>   pinMode(in1, OUTPUT);
>>   pinMode(in2, OUTPUT);
>>   // pinMode(in3, OUTPUT);
>>   // pinMode(in4, OUTPUT);
>> }
>> void demoOne()
>> {
>>   // this function will run the motors in both directions at a fixed speed
>>   // turn on motor A
>>   digitalWrite(in1, HIGH);
>>   digitalWrite(in2, LOW);
>>   // set speed to 200 out of possible range 0~255
>>   analogWrite(enA, 200);
>>   // turn on motor B
>>   // digitalWrite(in3, HIGH);
>>   // digitalWrite(in4, LOW);
>>   // set speed to 200 out of possible range 0~255
>>   // analogWrite(enB, 200);
>>   delay(2000);
>>   // now change motor directions
>>   digitalWrite(in1, LOW);
>>   digitalWrite(in2, HIGH);
>>   // digitalWrite(in3, LOW);
>>   // digitalWrite(in4, HIGH);
>>   //delay(2000);
>>   // now turn off motors
>>   digitalWrite(in1, LOW);
>>   digitalWrite(in2, LOW);
>>   // digitalWrite(in3, LOW);
>>   // digitalWrite(in4, LOW);
>> }
>> void demoTwo()
>> {
>>   // this function will run the motors across the range of possible speeds
>>   // note that maximum speed is determined by the motor itself and the
>> operating voltage
>>   // the PWM values sent by analogWrite() are fractions of the maximum
>> speed possible
>>   // by your hardware
>>   // turn on motors
>>   digitalWrite(in1, LOW);
>>   digitalWrite(in2, HIGH);
>>   // digitalWrite(in3, LOW);
>>   // digitalWrite(in4, HIGH);
>>   // accelerate from zero to maximum speed
>>   for (int i = 0; i < 256; i++)
>>   {
>>     analogWrite(enA, i);
>>     // analogWrite(enB, i);
>>     delay(20);
>>   }
>>   // decelerate from maximum speed to zero
>>   for (int i = 255; i >= 0; --i)
>>   {
>>     analogWrite(enA, i);
>>     // analogWrite(enB, i);
>>     delay(20);
>>   }
>>   // now turn off motors
>>   digitalWrite(in1, LOW);
>>   digitalWrite(in2, LOW);
>>   // digitalWrite(in3, LOW);
>>   // digitalWrite(in4, LOW);
>> }
>> void loop()
>> {
>>   demoOne();
>>   delay(1000);
>>   demoTwo();
>>   delay(1000);
>> }
>>
>>
>> Wired it all up with a 12V 5A power supply and the stepper shaft twitched
>> a bit , but the L298N emitted a puff of smoke and the heatsink got very hot
>> !
>>
>> Now I've checked the Arduino Uno and it seems aok.
>>
>> The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor
>> pin, ditto earth to nearest pin.
>>
>> Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft stops
>> being rotatable.  the two motor wires are at infinity.
>>
>> I've assumed that's a sign that I've not killed the stepper motor.
>>
>> Now before I get another L298N, I thought a few precautions are worth
>> while !  Slaying a series of L298N's doesn't seem that smart !!!  *LOL*
>>
>> Any thoughts from anyone as to what to investigate next ?  (I thought
>> perhaps the software was wrong for this model of stepper motor ?  I'm
>> capable of making crass errors here..)
>>
>> :  )
>>
>> Tim_1
>>
>> On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com>
>> wrote:
>>
>>> Reverse. ..
>>>
>>> If ULN 2003...
>>> The wiggle pins in other direction! !!
>>> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>>
>>>> Many thanks Ceri for the tip !  Greatly appreciated !
>>>>
>>>> :  )))
>>>>
>>>> Tim_1
>>>>
>>>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>
>>>>> Update:-
>>>>>
>>>>> It may not be very riveting but the change to 6400 (and the deletion
>>>>> of */ at the top of the code worked fine !
>>>>>
>>>>> the count for
>>>>> 90  deg was 500  and  time 52.5 secs
>>>>> 180 deg was 1000             105
>>>>> 270 deg was 1500             157.5
>>>>> 360 deg was 2000             210 secs ( 3m 30 secs)  approx
>>>>>
>>>>> (I hope !)
>>>>>
>>>>> Now this might be very boring, but it also might help a Newbie to
>>>>> stepper motors test their new purchase out too !
>>>>>
>>>>> Anyone know if the controller board can make it go in reverse ?
>>>>>
>>>>> :  )))
>>>>>
>>>>> Tim_1
>>>>>
>>>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>
>>>>>> I've been trying to get this working on a   28BYJ-48 with ULN2003
>>>>>> cheapest stepper motor set up.
>>>>>>
>>>>>>  Created 30 Nov. 2009
>>>>>>  by Tom Igoe
>>>>>>
>>>>>>  */
>>>>>>
>>>>>> #include <Stepper.h>
>>>>>>
>>>>>> const int stepsPerRevolution = 1440;  // change this to fit the
>>>>>> number of steps per revolution
>>>>>>                                      // for your motor
>>>>>>
>>>>>> // initialize the stepper library on pins 8 through 11:
>>>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);
>>>>>>
>>>>>> int stepCount = 0;         // number of steps the motor has taken
>>>>>>
>>>>>> void setup() {
>>>>>>   // initialize the serial port:
>>>>>>   Serial.begin(9600);
>>>>>> }
>>>>>>
>>>>>> void loop() {
>>>>>>   // step one step:
>>>>>>   myStepper.step(1);
>>>>>>   Serial.print("steps:" );
>>>>>>   Serial.println(stepCount);
>>>>>>   stepCount++;
>>>>>>   delay(100);
>>>>>> }
>>>>>>
>>>>>>
>>>>>> Spec:-
>>>>>>
>>>>>>
>>>>>>
>>>>>>    -
>>>>>>    - Voltage : 5V
>>>>>>    - Diameter : 28mm
>>>>>>    - Step angle : 5.625 x 1 / 64
>>>>>>    - Reduction ratio : 1 / 64
>>>>>>    - 5 Line 4 phase
>>>>>>    - Current draw : 92mA
>>>>>>    - Operating Frequency : 100pps
>>>>>>    - Dimensions : 35mm x 28mm
>>>>>>    - 4 mounting holes
>>>>>>    - ULN2003 chip
>>>>>>    - A, B, C, D four-phase status LED
>>>>>>
>>>>>> ___
>>>>>>
>>>>>>
>>>>>> Now the divide by 64 seems to be a stumbling block ?
>>>>>>
>>>>>> What I'm trying to do is use the 1.8 degree characteristic to get 100
>>>>>> pulses to achieve a total rotation of 180 degrees to the shaft.
>>>>>>
>>>>>> A period of anything up to two minutes is fine for the 180 degree
>>>>>> rotation.
>>>>>>
>>>>>> So far it twitches a bit but not much else e.g. not very exciting.
>>>>>>
>>>>>> Should the   stepsPerRevolution = 1440 be changed to stepsPerRevolution
>>>>>> = 6400 ?
>>>>>>
>>>>>> Maybe I've got the Arduino pins a tad wrong ?
>>>>>>
>>>>>> :  )
>>>>>>
>>>>>>
>>>>>> Tim_1
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 18 April 2015 at 19:58, Justin Mitchell <
>>>>>> justin at swansea.hackspace.org.uk> wrote:
>>>>>>
>>>>>>> Yes, one motor one step-stick.
>>>>>>>
>>>>>>> Control it from an arduino, or any other micro, just needs two GPIO
>>>>>>> lines.
>>>>>>>
>>>>>>>
>>>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
>>>>>>> > So a single 'step-stick' would do it ?
>>>>>>> >
>>>>>>> >
>>>>>>> > Many thanks for responding !
>>>>>>> >
>>>>>>> > :  )))
>>>>>>> >
>>>>>>> >
>>>>>>> > Tim_1
>>>>>>> >
>>>>>>> >
>>>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <
>>>>>>> justin at discordia.org.uk>
>>>>>>> > wrote:
>>>>>>> >         It's an interface for all the stuff you need to drive a 3d
>>>>>>> >         printer, takes 5 step-sticks for stepper driving, has power
>>>>>>> >         MOSFETs to pwm the hotends and heated bed, and a bunch of
>>>>>>> >         inputs for end stops and thermistors. You plug it into an
>>>>>>> >         Arduino mega board, install some software like Marlin and
>>>>>>> it
>>>>>>> >         can run your printer, or mixed to control a CNC mill or
>>>>>>> laser
>>>>>>> >         cutter.
>>>>>>> >
>>>>>>> >         Way over kill for driving one motor :)
>>>>>>> >
>>>>>>> >         On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com>
>>>>>>> >         wrote:
>>>>>>> >         >
>>>>>>> >         > Wow !  Loads of interesting links and ideas !
>>>>>>> >         >
>>>>>>> >         > Its a very slow rotation, so inertia is not a problem.
>>>>>>> >         >
>>>>>>> >         > Is a 'RAMPS 1.4' useful ?  what does it do ?
>>>>>>> >         >
>>>>>>> >         > Many thanks to all who have responded !
>>>>>>> >         >
>>>>>>> >         > :  )))
>>>>>>> >         >
>>>>>>> >         > Tim_1
>>>>>>> >         >
>>>>>>> >         > On 18 April 2015 at 13:57, oliver Oliver
>>>>>>> >         <oliver at oliverjenkins.com> wrote:
>>>>>>> >         >>
>>>>>>> >         >> Think about pulleys or gears.  I don't know if you want
>>>>>>> the
>>>>>>> >         pole to stop at a particular point or not.  Inertia in 1m
>>>>>>> pole
>>>>>>> >         will be higher than braking force of a stepper motor.  So
>>>>>>> it
>>>>>>> >         will continue to spin after you stop the motor. Giving you
>>>>>>> an
>>>>>>> >         unpredictable 180 plus rotation.
>>>>>>> >         >>
>>>>>>> >         >> For a pulley arrangement look at t5  timing belts.  you
>>>>>>> can
>>>>>>> >         easily print the pulleys using a reprap.  There are
>>>>>>> libraries
>>>>>>> >         on thingiverse.
>>>>>>> >         >>
>>>>>>> >         >> A worm gear would be better,  but you can't print those.
>>>>>>> >         >>
>>>>>>> >         >> Oli
>>>>>>> >         >>
>>>>>>> >         >> On 18 Apr 2015 12:33, "Tim Moore" <timmoore47 at gmail.com
>>>>>>> >
>>>>>>> >         wrote:
>>>>>>> >         >>>
>>>>>>> >         >>> I'm trying to carefully rorate a metre long light
>>>>>>> weight
>>>>>>> >         pole through 180 degrees.
>>>>>>> >         >>>
>>>>>>> >         >>> I've got a Stepper Motor type 28BYJ-48 working fine,
>>>>>>> but
>>>>>>> >         I'm sure I need one that is a bit more chunky !
>>>>>>> >         >>>
>>>>>>> >         >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high
>>>>>>> torque
>>>>>>> >         1.8 degree stepper motor  on the way with a controller card
>>>>>>> >         >>>
>>>>>>> >         >>> But I've not got a very clear vision yet what else I
>>>>>>> might
>>>>>>> >         need and if there is any Arduino example software listing
>>>>>>> that
>>>>>>> >         would be good to use to get it to work ?
>>>>>>> >         >>>
>>>>>>> >         >>> I don't want to reinvent the wheel !  *LOL*
>>>>>>> >         >>>
>>>>>>> >         >>> Any thoughts anyone ?
>>>>>>> >         >>>
>>>>>>> >         >>> :  )))
>>>>>>> >         >>>
>>>>>>> >         >>> Tim_1
>>>>>>> >         >>>
>>>>>>> >         >>> _______________________________________________
>>>>>>> >         >>> Hackspace mailing list
>>>>>>> >         >>> Hackspace at swansea.hackspace.org.uk
>>>>>>> >         >>>
>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>> >         >>>
>>>>>>> >         >>
>>>>>>> >         >> _______________________________________________
>>>>>>> >         >> Hackspace mailing list
>>>>>>> >         >> Hackspace at swansea.hackspace.org.uk
>>>>>>> >         >>
>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>> >         >>
>>>>>>> >         >
>>>>>>> >         _______________________________________________
>>>>>>> >         Hackspace mailing list
>>>>>>> >         Hackspace at swansea.hackspace.org.uk
>>>>>>> >         http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> > _______________________________________________
>>>>>>> > Hackspace mailing list
>>>>>>> > Hackspace at swansea.hackspace.org.uk
>>>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Hackspace mailing list
>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From ceri.clatworthy at gmail.com  Sat May  9 08:22:50 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Sat, 9 May 2015 08:22:50 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
	stepper motor.
In-Reply-To: <CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>
References: <CAAEY5oOPDcZP3_OT6swXr7nEOHcVEmBnycCYnKJZGX_j7EfN6g@mail.gmail.com>
	<77cee00f-d08d-44bc-83f3-403b60b4bf66@email.android.com>
	<CAAEY5oM-kSvwXVPQNovDC_betjtgq7wy_1f1e7eHRDWSWW-xUQ@mail.gmail.com>
	<1429383539.17143.1.camel@emerald.geode.org.uk>
	<CAAEY5oPyCjrL6yO7NFVWY+YG2pEpwJOpM=2_B9jHNxp3fZNQKQ@mail.gmail.com>
	<CAAEY5oOERWHq9hZrhqyC8-h-+RPUmYqECWqYqR+cXBBfaocS-Q@mail.gmail.com>
	<CAAEY5oNusbtHrpCRAORDFYgKuvEy7UMSeowjPRKim7r33umSEw@mail.gmail.com>
	<CAO=DJn90igwUPOBr5K4c9c-ioPmPrx=oC4nU0sbSdajy-bXHiA@mail.gmail.com>
	<CAAEY5oNAx_gUzHX_N7vdyg5twW=2cU-YyhkauC9QUZUdhewRiA@mail.gmail.com>
	<CAO=DJn8C=sYB6NTJ_cqs5j0EBC2qpsRKyGB7b7rmsHH=opV6xQ@mail.gmail.com>
	<CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>
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I am guessing that they are capacitors
On 9 May 2015 07:09, "Tim Moore" <timmoore47 at gmail.com> wrote:

> Magic blue smoke was released !  :  (((   So I've ordered another from
> China.
>
> I'll double check everything, as H configuration can short +12V to ground
> so easily !   Software can do that ! ?
>
> On another matter the L298N has two little cans marked '220 35V UT',  I've
> pnly recently come across them.  What are they ?
>
> Is there any favoured software to drive them that is known to work Arduino
> friendly?
>
> Many many thanks for responding !
>
> :  )))
>
> Tim_1
>
> On 8 May 2015 at 22:03, Ceri Clatworthy <ceri.clatworthy at gmail.com> wrote:
>
>> Fetch in in Monday an we will get it going
>>
>> Unless the magic blue smoke has been released
>> Ceri
>> On 8 May 2015 17:59, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>
>>> Well made sort of progress:-
>>>
>>> Got a 3D stepper type   17H16-2994S  in the hope it would be powerful
>>> enough to drive the thing I want to rotate.
>>>
>>> Based on an Arduino Uno with a L298N stepper controller,
>>>
>>> I found this software which I adapted for just one motor.
>>>
>>> quote
>>>
>>> // connect motor controller pins to Arduino digital pins
>>> // motor one
>>> int enA = 10;
>>> int in1 = 9;
>>> int in2 = 8;
>>> // motor two
>>> // int enB = 5;
>>> // int in3 = 7;
>>> // int in4 = 6;
>>> void setup()
>>> {
>>>   // set all the motor control pins to outputs
>>>   pinMode(enA, OUTPUT);
>>>   // pinMode(enB, OUTPUT);
>>>   pinMode(in1, OUTPUT);
>>>   pinMode(in2, OUTPUT);
>>>   // pinMode(in3, OUTPUT);
>>>   // pinMode(in4, OUTPUT);
>>> }
>>> void demoOne()
>>> {
>>>   // this function will run the motors in both directions at a fixed
>>> speed
>>>   // turn on motor A
>>>   digitalWrite(in1, HIGH);
>>>   digitalWrite(in2, LOW);
>>>   // set speed to 200 out of possible range 0~255
>>>   analogWrite(enA, 200);
>>>   // turn on motor B
>>>   // digitalWrite(in3, HIGH);
>>>   // digitalWrite(in4, LOW);
>>>   // set speed to 200 out of possible range 0~255
>>>   // analogWrite(enB, 200);
>>>   delay(2000);
>>>   // now change motor directions
>>>   digitalWrite(in1, LOW);
>>>   digitalWrite(in2, HIGH);
>>>   // digitalWrite(in3, LOW);
>>>   // digitalWrite(in4, HIGH);
>>>   //delay(2000);
>>>   // now turn off motors
>>>   digitalWrite(in1, LOW);
>>>   digitalWrite(in2, LOW);
>>>   // digitalWrite(in3, LOW);
>>>   // digitalWrite(in4, LOW);
>>> }
>>> void demoTwo()
>>> {
>>>   // this function will run the motors across the range of possible
>>> speeds
>>>   // note that maximum speed is determined by the motor itself and the
>>> operating voltage
>>>   // the PWM values sent by analogWrite() are fractions of the maximum
>>> speed possible
>>>   // by your hardware
>>>   // turn on motors
>>>   digitalWrite(in1, LOW);
>>>   digitalWrite(in2, HIGH);
>>>   // digitalWrite(in3, LOW);
>>>   // digitalWrite(in4, HIGH);
>>>   // accelerate from zero to maximum speed
>>>   for (int i = 0; i < 256; i++)
>>>   {
>>>     analogWrite(enA, i);
>>>     // analogWrite(enB, i);
>>>     delay(20);
>>>   }
>>>   // decelerate from maximum speed to zero
>>>   for (int i = 255; i >= 0; --i)
>>>   {
>>>     analogWrite(enA, i);
>>>     // analogWrite(enB, i);
>>>     delay(20);
>>>   }
>>>   // now turn off motors
>>>   digitalWrite(in1, LOW);
>>>   digitalWrite(in2, LOW);
>>>   // digitalWrite(in3, LOW);
>>>   // digitalWrite(in4, LOW);
>>> }
>>> void loop()
>>> {
>>>   demoOne();
>>>   delay(1000);
>>>   demoTwo();
>>>   delay(1000);
>>> }
>>>
>>>
>>> Wired it all up with a 12V 5A power supply and the stepper shaft
>>> twitched a bit , but the L298N emitted a puff of smoke and the heatsink got
>>> very hot !
>>>
>>> Now I've checked the Arduino Uno and it seems aok.
>>>
>>> The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor
>>> pin, ditto earth to nearest pin.
>>>
>>> Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft
>>> stops being rotatable.  the two motor wires are at infinity.
>>>
>>> I've assumed that's a sign that I've not killed the stepper motor.
>>>
>>> Now before I get another L298N, I thought a few precautions are worth
>>> while !  Slaying a series of L298N's doesn't seem that smart !!!  *LOL*
>>>
>>> Any thoughts from anyone as to what to investigate next ?  (I thought
>>> perhaps the software was wrong for this model of stepper motor ?  I'm
>>> capable of making crass errors here..)
>>>
>>> :  )
>>>
>>> Tim_1
>>>
>>> On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com>
>>> wrote:
>>>
>>>> Reverse. ..
>>>>
>>>> If ULN 2003...
>>>> The wiggle pins in other direction! !!
>>>> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>>>
>>>>> Many thanks Ceri for the tip !  Greatly appreciated !
>>>>>
>>>>> :  )))
>>>>>
>>>>> Tim_1
>>>>>
>>>>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>
>>>>>> Update:-
>>>>>>
>>>>>> It may not be very riveting but the change to 6400 (and the deletion
>>>>>> of */ at the top of the code worked fine !
>>>>>>
>>>>>> the count for
>>>>>> 90  deg was 500  and  time 52.5 secs
>>>>>> 180 deg was 1000             105
>>>>>> 270 deg was 1500             157.5
>>>>>> 360 deg was 2000             210 secs ( 3m 30 secs)  approx
>>>>>>
>>>>>> (I hope !)
>>>>>>
>>>>>> Now this might be very boring, but it also might help a Newbie to
>>>>>> stepper motors test their new purchase out too !
>>>>>>
>>>>>> Anyone know if the controller board can make it go in reverse ?
>>>>>>
>>>>>> :  )))
>>>>>>
>>>>>> Tim_1
>>>>>>
>>>>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>>
>>>>>>> I've been trying to get this working on a   28BYJ-48 with ULN2003
>>>>>>> cheapest stepper motor set up.
>>>>>>>
>>>>>>>  Created 30 Nov. 2009
>>>>>>>  by Tom Igoe
>>>>>>>
>>>>>>>  */
>>>>>>>
>>>>>>> #include <Stepper.h>
>>>>>>>
>>>>>>> const int stepsPerRevolution = 1440;  // change this to fit the
>>>>>>> number of steps per revolution
>>>>>>>                                      // for your motor
>>>>>>>
>>>>>>> // initialize the stepper library on pins 8 through 11:
>>>>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);
>>>>>>>
>>>>>>> int stepCount = 0;         // number of steps the motor has taken
>>>>>>>
>>>>>>> void setup() {
>>>>>>>   // initialize the serial port:
>>>>>>>   Serial.begin(9600);
>>>>>>> }
>>>>>>>
>>>>>>> void loop() {
>>>>>>>   // step one step:
>>>>>>>   myStepper.step(1);
>>>>>>>   Serial.print("steps:" );
>>>>>>>   Serial.println(stepCount);
>>>>>>>   stepCount++;
>>>>>>>   delay(100);
>>>>>>> }
>>>>>>>
>>>>>>>
>>>>>>> Spec:-
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>    -
>>>>>>>    - Voltage : 5V
>>>>>>>    - Diameter : 28mm
>>>>>>>    - Step angle : 5.625 x 1 / 64
>>>>>>>    - Reduction ratio : 1 / 64
>>>>>>>    - 5 Line 4 phase
>>>>>>>    - Current draw : 92mA
>>>>>>>    - Operating Frequency : 100pps
>>>>>>>    - Dimensions : 35mm x 28mm
>>>>>>>    - 4 mounting holes
>>>>>>>    - ULN2003 chip
>>>>>>>    - A, B, C, D four-phase status LED
>>>>>>>
>>>>>>> ___
>>>>>>>
>>>>>>>
>>>>>>> Now the divide by 64 seems to be a stumbling block ?
>>>>>>>
>>>>>>> What I'm trying to do is use the 1.8 degree characteristic to get
>>>>>>> 100 pulses to achieve a total rotation of 180 degrees to the shaft.
>>>>>>>
>>>>>>> A period of anything up to two minutes is fine for the 180 degree
>>>>>>> rotation.
>>>>>>>
>>>>>>> So far it twitches a bit but not much else e.g. not very exciting.
>>>>>>>
>>>>>>> Should the   stepsPerRevolution = 1440 be changed to stepsPerRevolution
>>>>>>> = 6400 ?
>>>>>>>
>>>>>>> Maybe I've got the Arduino pins a tad wrong ?
>>>>>>>
>>>>>>> :  )
>>>>>>>
>>>>>>>
>>>>>>> Tim_1
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 18 April 2015 at 19:58, Justin Mitchell <
>>>>>>> justin at swansea.hackspace.org.uk> wrote:
>>>>>>>
>>>>>>>> Yes, one motor one step-stick.
>>>>>>>>
>>>>>>>> Control it from an arduino, or any other micro, just needs two GPIO
>>>>>>>> lines.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
>>>>>>>> > So a single 'step-stick' would do it ?
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Many thanks for responding !
>>>>>>>> >
>>>>>>>> > :  )))
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Tim_1
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <
>>>>>>>> justin at discordia.org.uk>
>>>>>>>> > wrote:
>>>>>>>> >         It's an interface for all the stuff you need to drive a 3d
>>>>>>>> >         printer, takes 5 step-sticks for stepper driving, has
>>>>>>>> power
>>>>>>>> >         MOSFETs to pwm the hotends and heated bed, and a bunch of
>>>>>>>> >         inputs for end stops and thermistors. You plug it into an
>>>>>>>> >         Arduino mega board, install some software like Marlin and
>>>>>>>> it
>>>>>>>> >         can run your printer, or mixed to control a CNC mill or
>>>>>>>> laser
>>>>>>>> >         cutter.
>>>>>>>> >
>>>>>>>> >         Way over kill for driving one motor :)
>>>>>>>> >
>>>>>>>> >         On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com>
>>>>>>>> >         wrote:
>>>>>>>> >         >
>>>>>>>> >         > Wow !  Loads of interesting links and ideas !
>>>>>>>> >         >
>>>>>>>> >         > Its a very slow rotation, so inertia is not a problem.
>>>>>>>> >         >
>>>>>>>> >         > Is a 'RAMPS 1.4' useful ?  what does it do ?
>>>>>>>> >         >
>>>>>>>> >         > Many thanks to all who have responded !
>>>>>>>> >         >
>>>>>>>> >         > :  )))
>>>>>>>> >         >
>>>>>>>> >         > Tim_1
>>>>>>>> >         >
>>>>>>>> >         > On 18 April 2015 at 13:57, oliver Oliver
>>>>>>>> >         <oliver at oliverjenkins.com> wrote:
>>>>>>>> >         >>
>>>>>>>> >         >> Think about pulleys or gears.  I don't know if you
>>>>>>>> want the
>>>>>>>> >         pole to stop at a particular point or not.  Inertia in 1m
>>>>>>>> pole
>>>>>>>> >         will be higher than braking force of a stepper motor.  So
>>>>>>>> it
>>>>>>>> >         will continue to spin after you stop the motor. Giving
>>>>>>>> you an
>>>>>>>> >         unpredictable 180 plus rotation.
>>>>>>>> >         >>
>>>>>>>> >         >> For a pulley arrangement look at t5  timing belts.
>>>>>>>> you can
>>>>>>>> >         easily print the pulleys using a reprap.  There are
>>>>>>>> libraries
>>>>>>>> >         on thingiverse.
>>>>>>>> >         >>
>>>>>>>> >         >> A worm gear would be better,  but you can't print
>>>>>>>> those.
>>>>>>>> >         >>
>>>>>>>> >         >> Oli
>>>>>>>> >         >>
>>>>>>>> >         >> On 18 Apr 2015 12:33, "Tim Moore" <
>>>>>>>> timmoore47 at gmail.com>
>>>>>>>> >         wrote:
>>>>>>>> >         >>>
>>>>>>>> >         >>> I'm trying to carefully rorate a metre long light
>>>>>>>> weight
>>>>>>>> >         pole through 180 degrees.
>>>>>>>> >         >>>
>>>>>>>> >         >>> I've got a Stepper Motor type 28BYJ-48 working fine,
>>>>>>>> but
>>>>>>>> >         I'm sure I need one that is a bit more chunky !
>>>>>>>> >         >>>
>>>>>>>> >         >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high
>>>>>>>> torque
>>>>>>>> >         1.8 degree stepper motor  on the way with a controller
>>>>>>>> card
>>>>>>>> >         >>>
>>>>>>>> >         >>> But I've not got a very clear vision yet what else I
>>>>>>>> might
>>>>>>>> >         need and if there is any Arduino example software listing
>>>>>>>> that
>>>>>>>> >         would be good to use to get it to work ?
>>>>>>>> >         >>>
>>>>>>>> >         >>> I don't want to reinvent the wheel !  *LOL*
>>>>>>>> >         >>>
>>>>>>>> >         >>> Any thoughts anyone ?
>>>>>>>> >         >>>
>>>>>>>> >         >>> :  )))
>>>>>>>> >         >>>
>>>>>>>> >         >>> Tim_1
>>>>>>>> >         >>>
>>>>>>>> >         >>> _______________________________________________
>>>>>>>> >         >>> Hackspace mailing list
>>>>>>>> >         >>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> >         >>>
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>> >         >>>
>>>>>>>> >         >>
>>>>>>>> >         >> _______________________________________________
>>>>>>>> >         >> Hackspace mailing list
>>>>>>>> >         >> Hackspace at swansea.hackspace.org.uk
>>>>>>>> >         >>
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>> >         >>
>>>>>>>> >         >
>>>>>>>> >         _______________________________________________
>>>>>>>> >         Hackspace mailing list
>>>>>>>> >         Hackspace at swansea.hackspace.org.uk
>>>>>>>> >
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > _______________________________________________
>>>>>>>> > Hackspace mailing list
>>>>>>>> > Hackspace at swansea.hackspace.org.uk
>>>>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Hackspace mailing list
>>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>
> _______________________________________________
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>
>
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From ceri.clatworthy at gmail.com  Sat May  9 08:23:10 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Sat, 9 May 2015 08:23:10 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
	stepper motor.
In-Reply-To: <CAO=DJn_p4NWLgMf-Uxj0rPqW0U=Tq9Yc9iREOP3qBvPWNkJUfQ@mail.gmail.com>
References: <CAAEY5oOPDcZP3_OT6swXr7nEOHcVEmBnycCYnKJZGX_j7EfN6g@mail.gmail.com>
	<77cee00f-d08d-44bc-83f3-403b60b4bf66@email.android.com>
	<CAAEY5oM-kSvwXVPQNovDC_betjtgq7wy_1f1e7eHRDWSWW-xUQ@mail.gmail.com>
	<1429383539.17143.1.camel@emerald.geode.org.uk>
	<CAAEY5oPyCjrL6yO7NFVWY+YG2pEpwJOpM=2_B9jHNxp3fZNQKQ@mail.gmail.com>
	<CAAEY5oOERWHq9hZrhqyC8-h-+RPUmYqECWqYqR+cXBBfaocS-Q@mail.gmail.com>
	<CAAEY5oNusbtHrpCRAORDFYgKuvEy7UMSeowjPRKim7r33umSEw@mail.gmail.com>
	<CAO=DJn90igwUPOBr5K4c9c-ioPmPrx=oC4nU0sbSdajy-bXHiA@mail.gmail.com>
	<CAAEY5oNAx_gUzHX_N7vdyg5twW=2cU-YyhkauC9QUZUdhewRiA@mail.gmail.com>
	<CAO=DJn8C=sYB6NTJ_cqs5j0EBC2qpsRKyGB7b7rmsHH=opV6xQ@mail.gmail.com>
	<CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>
	<CAO=DJn_p4NWLgMf-Uxj0rPqW0U=Tq9Yc9iREOP3qBvPWNkJUfQ@mail.gmail.com>
Message-ID: <CAO=DJn_6bUHJ3CM0ict4NZYsiqE_7pr1-5U6=MxYhiHJ8v9NeQ@mail.gmail.com>

Add a photo! !!!
On 9 May 2015 08:22, "Ceri Clatworthy" <ceri.clatworthy at gmail.com> wrote:

> I am guessing that they are capacitors
> On 9 May 2015 07:09, "Tim Moore" <timmoore47 at gmail.com> wrote:
>
>> Magic blue smoke was released !  :  (((   So I've ordered another from
>> China.
>>
>> I'll double check everything, as H configuration can short +12V to ground
>> so easily !   Software can do that ! ?
>>
>> On another matter the L298N has two little cans marked '220 35V UT',
>> I've pnly recently come across them.  What are they ?
>>
>> Is there any favoured software to drive them that is known to work
>> Arduino friendly?
>>
>> Many many thanks for responding !
>>
>> :  )))
>>
>> Tim_1
>>
>> On 8 May 2015 at 22:03, Ceri Clatworthy <ceri.clatworthy at gmail.com>
>> wrote:
>>
>>> Fetch in in Monday an we will get it going
>>>
>>> Unless the magic blue smoke has been released
>>> Ceri
>>> On 8 May 2015 17:59, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>>
>>>> Well made sort of progress:-
>>>>
>>>> Got a 3D stepper type   17H16-2994S  in the hope it would be powerful
>>>> enough to drive the thing I want to rotate.
>>>>
>>>> Based on an Arduino Uno with a L298N stepper controller,
>>>>
>>>> I found this software which I adapted for just one motor.
>>>>
>>>> quote
>>>>
>>>> // connect motor controller pins to Arduino digital pins
>>>> // motor one
>>>> int enA = 10;
>>>> int in1 = 9;
>>>> int in2 = 8;
>>>> // motor two
>>>> // int enB = 5;
>>>> // int in3 = 7;
>>>> // int in4 = 6;
>>>> void setup()
>>>> {
>>>>   // set all the motor control pins to outputs
>>>>   pinMode(enA, OUTPUT);
>>>>   // pinMode(enB, OUTPUT);
>>>>   pinMode(in1, OUTPUT);
>>>>   pinMode(in2, OUTPUT);
>>>>   // pinMode(in3, OUTPUT);
>>>>   // pinMode(in4, OUTPUT);
>>>> }
>>>> void demoOne()
>>>> {
>>>>   // this function will run the motors in both directions at a fixed
>>>> speed
>>>>   // turn on motor A
>>>>   digitalWrite(in1, HIGH);
>>>>   digitalWrite(in2, LOW);
>>>>   // set speed to 200 out of possible range 0~255
>>>>   analogWrite(enA, 200);
>>>>   // turn on motor B
>>>>   // digitalWrite(in3, HIGH);
>>>>   // digitalWrite(in4, LOW);
>>>>   // set speed to 200 out of possible range 0~255
>>>>   // analogWrite(enB, 200);
>>>>   delay(2000);
>>>>   // now change motor directions
>>>>   digitalWrite(in1, LOW);
>>>>   digitalWrite(in2, HIGH);
>>>>   // digitalWrite(in3, LOW);
>>>>   // digitalWrite(in4, HIGH);
>>>>   //delay(2000);
>>>>   // now turn off motors
>>>>   digitalWrite(in1, LOW);
>>>>   digitalWrite(in2, LOW);
>>>>   // digitalWrite(in3, LOW);
>>>>   // digitalWrite(in4, LOW);
>>>> }
>>>> void demoTwo()
>>>> {
>>>>   // this function will run the motors across the range of possible
>>>> speeds
>>>>   // note that maximum speed is determined by the motor itself and the
>>>> operating voltage
>>>>   // the PWM values sent by analogWrite() are fractions of the maximum
>>>> speed possible
>>>>   // by your hardware
>>>>   // turn on motors
>>>>   digitalWrite(in1, LOW);
>>>>   digitalWrite(in2, HIGH);
>>>>   // digitalWrite(in3, LOW);
>>>>   // digitalWrite(in4, HIGH);
>>>>   // accelerate from zero to maximum speed
>>>>   for (int i = 0; i < 256; i++)
>>>>   {
>>>>     analogWrite(enA, i);
>>>>     // analogWrite(enB, i);
>>>>     delay(20);
>>>>   }
>>>>   // decelerate from maximum speed to zero
>>>>   for (int i = 255; i >= 0; --i)
>>>>   {
>>>>     analogWrite(enA, i);
>>>>     // analogWrite(enB, i);
>>>>     delay(20);
>>>>   }
>>>>   // now turn off motors
>>>>   digitalWrite(in1, LOW);
>>>>   digitalWrite(in2, LOW);
>>>>   // digitalWrite(in3, LOW);
>>>>   // digitalWrite(in4, LOW);
>>>> }
>>>> void loop()
>>>> {
>>>>   demoOne();
>>>>   delay(1000);
>>>>   demoTwo();
>>>>   delay(1000);
>>>> }
>>>>
>>>>
>>>> Wired it all up with a 12V 5A power supply and the stepper shaft
>>>> twitched a bit , but the L298N emitted a puff of smoke and the heatsink got
>>>> very hot !
>>>>
>>>> Now I've checked the Arduino Uno and it seems aok.
>>>>
>>>> The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor
>>>> pin, ditto earth to nearest pin.
>>>>
>>>> Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft
>>>> stops being rotatable.  the two motor wires are at infinity.
>>>>
>>>> I've assumed that's a sign that I've not killed the stepper motor.
>>>>
>>>> Now before I get another L298N, I thought a few precautions are worth
>>>> while !  Slaying a series of L298N's doesn't seem that smart !!!  *LOL*
>>>>
>>>> Any thoughts from anyone as to what to investigate next ?  (I thought
>>>> perhaps the software was wrong for this model of stepper motor ?  I'm
>>>> capable of making crass errors here..)
>>>>
>>>> :  )
>>>>
>>>> Tim_1
>>>>
>>>> On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com>
>>>> wrote:
>>>>
>>>>> Reverse. ..
>>>>>
>>>>> If ULN 2003...
>>>>> The wiggle pins in other direction! !!
>>>>> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>>>>
>>>>>> Many thanks Ceri for the tip !  Greatly appreciated !
>>>>>>
>>>>>> :  )))
>>>>>>
>>>>>> Tim_1
>>>>>>
>>>>>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>>
>>>>>>> Update:-
>>>>>>>
>>>>>>> It may not be very riveting but the change to 6400 (and the deletion
>>>>>>> of */ at the top of the code worked fine !
>>>>>>>
>>>>>>> the count for
>>>>>>> 90  deg was 500  and  time 52.5 secs
>>>>>>> 180 deg was 1000             105
>>>>>>> 270 deg was 1500             157.5
>>>>>>> 360 deg was 2000             210 secs ( 3m 30 secs)  approx
>>>>>>>
>>>>>>> (I hope !)
>>>>>>>
>>>>>>> Now this might be very boring, but it also might help a Newbie to
>>>>>>> stepper motors test their new purchase out too !
>>>>>>>
>>>>>>> Anyone know if the controller board can make it go in reverse ?
>>>>>>>
>>>>>>> :  )))
>>>>>>>
>>>>>>> Tim_1
>>>>>>>
>>>>>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>>>
>>>>>>>> I've been trying to get this working on a   28BYJ-48 with ULN2003
>>>>>>>> cheapest stepper motor set up.
>>>>>>>>
>>>>>>>>  Created 30 Nov. 2009
>>>>>>>>  by Tom Igoe
>>>>>>>>
>>>>>>>>  */
>>>>>>>>
>>>>>>>> #include <Stepper.h>
>>>>>>>>
>>>>>>>> const int stepsPerRevolution = 1440;  // change this to fit the
>>>>>>>> number of steps per revolution
>>>>>>>>                                      // for your motor
>>>>>>>>
>>>>>>>> // initialize the stepper library on pins 8 through 11:
>>>>>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);
>>>>>>>>
>>>>>>>> int stepCount = 0;         // number of steps the motor has taken
>>>>>>>>
>>>>>>>> void setup() {
>>>>>>>>   // initialize the serial port:
>>>>>>>>   Serial.begin(9600);
>>>>>>>> }
>>>>>>>>
>>>>>>>> void loop() {
>>>>>>>>   // step one step:
>>>>>>>>   myStepper.step(1);
>>>>>>>>   Serial.print("steps:" );
>>>>>>>>   Serial.println(stepCount);
>>>>>>>>   stepCount++;
>>>>>>>>   delay(100);
>>>>>>>> }
>>>>>>>>
>>>>>>>>
>>>>>>>> Spec:-
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>    -
>>>>>>>>    - Voltage : 5V
>>>>>>>>    - Diameter : 28mm
>>>>>>>>    - Step angle : 5.625 x 1 / 64
>>>>>>>>    - Reduction ratio : 1 / 64
>>>>>>>>    - 5 Line 4 phase
>>>>>>>>    - Current draw : 92mA
>>>>>>>>    - Operating Frequency : 100pps
>>>>>>>>    - Dimensions : 35mm x 28mm
>>>>>>>>    - 4 mounting holes
>>>>>>>>    - ULN2003 chip
>>>>>>>>    - A, B, C, D four-phase status LED
>>>>>>>>
>>>>>>>> ___
>>>>>>>>
>>>>>>>>
>>>>>>>> Now the divide by 64 seems to be a stumbling block ?
>>>>>>>>
>>>>>>>> What I'm trying to do is use the 1.8 degree characteristic to get
>>>>>>>> 100 pulses to achieve a total rotation of 180 degrees to the shaft.
>>>>>>>>
>>>>>>>> A period of anything up to two minutes is fine for the 180 degree
>>>>>>>> rotation.
>>>>>>>>
>>>>>>>> So far it twitches a bit but not much else e.g. not very exciting.
>>>>>>>>
>>>>>>>> Should the   stepsPerRevolution = 1440 be changed to stepsPerRevolution
>>>>>>>> = 6400 ?
>>>>>>>>
>>>>>>>> Maybe I've got the Arduino pins a tad wrong ?
>>>>>>>>
>>>>>>>> :  )
>>>>>>>>
>>>>>>>>
>>>>>>>> Tim_1
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On 18 April 2015 at 19:58, Justin Mitchell <
>>>>>>>> justin at swansea.hackspace.org.uk> wrote:
>>>>>>>>
>>>>>>>>> Yes, one motor one step-stick.
>>>>>>>>>
>>>>>>>>> Control it from an arduino, or any other micro, just needs two GPIO
>>>>>>>>> lines.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
>>>>>>>>> > So a single 'step-stick' would do it ?
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Many thanks for responding !
>>>>>>>>> >
>>>>>>>>> > :  )))
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > Tim_1
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <
>>>>>>>>> justin at discordia.org.uk>
>>>>>>>>> > wrote:
>>>>>>>>> >         It's an interface for all the stuff you need to drive a
>>>>>>>>> 3d
>>>>>>>>> >         printer, takes 5 step-sticks for stepper driving, has
>>>>>>>>> power
>>>>>>>>> >         MOSFETs to pwm the hotends and heated bed, and a bunch of
>>>>>>>>> >         inputs for end stops and thermistors. You plug it into an
>>>>>>>>> >         Arduino mega board, install some software like Marlin
>>>>>>>>> and it
>>>>>>>>> >         can run your printer, or mixed to control a CNC mill or
>>>>>>>>> laser
>>>>>>>>> >         cutter.
>>>>>>>>> >
>>>>>>>>> >         Way over kill for driving one motor :)
>>>>>>>>> >
>>>>>>>>> >         On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com>
>>>>>>>>> >         wrote:
>>>>>>>>> >         >
>>>>>>>>> >         > Wow !  Loads of interesting links and ideas !
>>>>>>>>> >         >
>>>>>>>>> >         > Its a very slow rotation, so inertia is not a problem.
>>>>>>>>> >         >
>>>>>>>>> >         > Is a 'RAMPS 1.4' useful ?  what does it do ?
>>>>>>>>> >         >
>>>>>>>>> >         > Many thanks to all who have responded !
>>>>>>>>> >         >
>>>>>>>>> >         > :  )))
>>>>>>>>> >         >
>>>>>>>>> >         > Tim_1
>>>>>>>>> >         >
>>>>>>>>> >         > On 18 April 2015 at 13:57, oliver Oliver
>>>>>>>>> >         <oliver at oliverjenkins.com> wrote:
>>>>>>>>> >         >>
>>>>>>>>> >         >> Think about pulleys or gears.  I don't know if you
>>>>>>>>> want the
>>>>>>>>> >         pole to stop at a particular point or not.  Inertia in
>>>>>>>>> 1m pole
>>>>>>>>> >         will be higher than braking force of a stepper motor.
>>>>>>>>> So it
>>>>>>>>> >         will continue to spin after you stop the motor. Giving
>>>>>>>>> you an
>>>>>>>>> >         unpredictable 180 plus rotation.
>>>>>>>>> >         >>
>>>>>>>>> >         >> For a pulley arrangement look at t5  timing belts.
>>>>>>>>> you can
>>>>>>>>> >         easily print the pulleys using a reprap.  There are
>>>>>>>>> libraries
>>>>>>>>> >         on thingiverse.
>>>>>>>>> >         >>
>>>>>>>>> >         >> A worm gear would be better,  but you can't print
>>>>>>>>> those.
>>>>>>>>> >         >>
>>>>>>>>> >         >> Oli
>>>>>>>>> >         >>
>>>>>>>>> >         >> On 18 Apr 2015 12:33, "Tim Moore" <
>>>>>>>>> timmoore47 at gmail.com>
>>>>>>>>> >         wrote:
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> I'm trying to carefully rorate a metre long light
>>>>>>>>> weight
>>>>>>>>> >         pole through 180 degrees.
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> I've got a Stepper Motor type 28BYJ-48 working fine,
>>>>>>>>> but
>>>>>>>>> >         I'm sure I need one that is a bit more chunky !
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high
>>>>>>>>> torque
>>>>>>>>> >         1.8 degree stepper motor  on the way with a controller
>>>>>>>>> card
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> But I've not got a very clear vision yet what else I
>>>>>>>>> might
>>>>>>>>> >         need and if there is any Arduino example software
>>>>>>>>> listing that
>>>>>>>>> >         would be good to use to get it to work ?
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> I don't want to reinvent the wheel !  *LOL*
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> Any thoughts anyone ?
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> :  )))
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> Tim_1
>>>>>>>>> >         >>>
>>>>>>>>> >         >>> _______________________________________________
>>>>>>>>> >         >>> Hackspace mailing list
>>>>>>>>> >         >>> Hackspace at swansea.hackspace.org.uk
>>>>>>>>> >         >>>
>>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>> >         >>>
>>>>>>>>> >         >>
>>>>>>>>> >         >> _______________________________________________
>>>>>>>>> >         >> Hackspace mailing list
>>>>>>>>> >         >> Hackspace at swansea.hackspace.org.uk
>>>>>>>>> >         >>
>>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>> >         >>
>>>>>>>>> >         >
>>>>>>>>> >         _______________________________________________
>>>>>>>>> >         Hackspace mailing list
>>>>>>>>> >         Hackspace at swansea.hackspace.org.uk
>>>>>>>>> >
>>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> >
>>>>>>>>> > _______________________________________________
>>>>>>>>> > Hackspace mailing list
>>>>>>>>> > Hackspace at swansea.hackspace.org.uk
>>>>>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> Hackspace mailing list
>>>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Hackspace mailing list
>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
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From justin at discordia.org.uk  Sat May  9 10:32:09 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Sat, 09 May 2015 10:32:09 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D
	printer	stepper motor.
In-Reply-To: <CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>
Message-ID: <037427b5-e5ae-479d-83cc-4298ec86c762@email.android.com>

This does seem the hard way to do things when something like an A4988 stepstick is a similar price and way simpler to use.

Did you need some specifically higher current or other requirement?

On 9 May 2015 7:09 am, Tim Moore <timmoore47 at gmail.com> wrote:
>
> Magic blue smoke was released !? :? (((?? So I've ordered another from China.
>
> I'll double check everything, as H configuration can short +12V to ground so easily !?? Software can do that ! ?
>
> On another matter the L298N has two little cans marked '220 35V UT',? I've pnly recently come across them.? What are they ?
>
> Is there any favoured software to drive them that is known to work Arduino friendly?
>
> Many many thanks for responding !
>
> :? )))
>
> Tim_1
>
> On 8 May 2015 at 22:03, Ceri Clatworthy <ceri.clatworthy at gmail.com> wrote:
>>
>> Fetch in in Monday an we will get it going
>>
>> Unless the magic blue smoke has been released 
>> Ceri
>>
>> On 8 May 2015 17:59, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>>
>>> Well made sort of progress:-
>>>
>>> Got a 3D stepper type?? 17H16-2994S? in the hope it would be powerful enough to drive the thing I want to rotate.
>>>
>>> Based on an Arduino Uno with a L298N stepper controller,
>>>
>>> I found this software which I adapted for just one motor.
>>>
>>> quote
>>>
>>> // connect motor controller pins to Arduino digital pins
>>> // motor one
>>> int enA = 10;
>>> int in1 = 9;
>>> int in2 = 8;
>>> // motor two
>>> // int enB = 5;
>>> // int in3 = 7;
>>> // int in4 = 6;
>>> void setup()
>>> {
>>> ? // set all the motor control pins to outputs
>>> ? pinMode(enA, OUTPUT);
>>> ? // pinMode(enB, OUTPUT);
>>> ? pinMode(in1, OUTPUT);
>>> ? pinMode(in2, OUTPUT);
>>> ? // pinMode(in3, OUTPUT);
>>> ? // pinMode(in4, OUTPUT);
>>> }
>>> void demoOne()
>>> {
>>> ? // this function will run the motors in both directions at a fixed speed
>>> ? // turn on motor A
>>> ? digitalWrite(in1, HIGH);
>>> ? digitalWrite(in2, LOW);
>>> ? // set speed to 200 out of possible range 0~255
>>> ? analogWrite(enA, 200);
>>> ? // turn on motor B
>>> ? // digitalWrite(in3, HIGH);
>>> ? // digitalWrite(in4, LOW);
>>> ? // set speed to 200 out of possible range 0~255
>>> ? // analogWrite(enB, 200);
>>> ? delay(2000);
>>> ? // now change motor directions
>>> ? digitalWrite(in1, LOW);
>>> ? digitalWrite(in2, HIGH);? 
>>> ? // digitalWrite(in3, LOW);
>>> ? // digitalWrite(in4, HIGH); 
>>> ? //delay(2000);
>>> ? // now turn off motors
>>> ? digitalWrite(in1, LOW);
>>> ? digitalWrite(in2, LOW);? 
>>> ? // digitalWrite(in3, LOW);
>>> ? // digitalWrite(in4, LOW);
>>> }
>>> void demoTwo()
>>> {
>>> ? // this function will run the motors across the range of possible speeds
>>> ? // note that maximum speed is determined by the motor itself and the operating voltage
>>> ? // the PWM values sent by analogWrite() are fractions of the maximum speed possible 
>>> ? // by your hardware
>>> ? // turn on motors
>>> ? digitalWrite(in1, LOW);
>>> ? digitalWrite(in2, HIGH);? 
>>> ? // digitalWrite(in3, LOW);
>>> ? // digitalWrite(in4, HIGH); 
>>> ? // accelerate from zero to maximum speed
>>> ? for (int i = 0; i < 256; i++)
>>> ? {
>>> ??? analogWrite(enA, i);
>>> ??? // analogWrite(enB, i);
>>> ??? delay(20);
>>> ? } 
>>> ? // decelerate from maximum speed to zero
>>> ? for (int i = 255; i >= 0; --i)
>>> ? {
>>> ??? analogWrite(enA, i);
>>> ??? // analogWrite(enB, i);
>>> ??? delay(20);
>>> ? } 
>>> ? // now turn off motors
>>> ? digitalWrite(in1, LOW);
>>> ? digitalWrite(in2, LOW);? 
>>> ? // digitalWrite(in3, LOW);
>>> ? // digitalWrite(in4, LOW);? 
>>> }
>>> void loop()
>>> {
>>> ? demoOne();
>>> ? delay(1000);
>>> ? demoTwo();
>>> ? delay(1000);
>>> }
>>>
>>>
>>> Wired it all up with a 12V 5A power supply and the stepper shaft twitched a bit , but the L298N emitted a puff of smoke and the heatsink got very hot !
>>>
>>> Now I've checked the Arduino Uno and it seems aok.
>>>
>>> The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor pin, ditto earth to nearest pin.
>>>
>>> Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft stops being rotatable.? the two motor wires are at infinity.
>>>
>>> I've assumed that's a sign that I've not killed the stepper motor.
>>>
>>> Now before I get another L298N, I thought a few precautions are worth while !? Slaying a series of L298N's doesn't seem that smart !!!? *LOL*
>>>
>>> Any thoughts from anyone as to what to investigate next ?? (I thought perhaps the software was wrong for this model of stepper motor ?? I'm capable of making crass errors here..)
>>>
>>> :? )
>>>
>>> Tim_1
>>>
>>> On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com> wrote:
>>>>
>>>> Reverse. ..
>>>>
>>>> If ULN 2003...
>>>> The wiggle pins in other direction! !!
>>>>
>>>> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
>>>>>
>>>>> Many thanks Ceri for the tip !? Greatly appreciated !
>>>>>
>>>>> :? )))
>>>>>
>>>>> Tim_1
>>>>>
>>>>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>>
>>>>>> Update:-
>>>>>>
>>>>>> It may not be very riveting but the change to 6400 (and the deletion of */ at the top of the code worked fine !
>>>>>>
>>>>>> the count for 
>>>>>> 90? deg was 500? and? time 52.5 secs
>>>>>> 180 deg was 1000???????????? 105
>>>>>> 270 deg was 1500???????????? 157.5
>>>>>> 360 deg was 2000??????? ? ?? 210 secs ( 3m 30 secs)? approx 
>>>>>>
>>>>>> (I hope !)
>>>>>>
>>>>>> Now this might be very boring, but it also might help a Newbie to stepper motors test their new purchase out too !
>>>>>>
>>>>>> Anyone know if the controller board can make it go in reverse ?
>>>>>>
>>>>>> :? )))
>>>>>>
>>>>>> Tim_1
>>>>>>
>>>>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
>>>>>>>
>>>>>>> I've been trying to get this working on a?? 28BYJ-48 with ULN2003 cheapest stepper motor set up.
>>>>>>>
>>>>>>> ?Created 30 Nov. 2009
>>>>>>> ?by Tom Igoe
>>>>>>> ?
>>>>>>> ?*/
>>>>>>>
>>>>>>> #include <Stepper.h>
>>>>>>>
>>>>>>> const int stepsPerRevolution = 1440;? // change this to fit the number of steps per revolution
>>>>>>> ???????????????????????????????????? // for your motor
>>>>>>>
>>>>>>> // initialize the stepper library on pins 8 through 11:
>>>>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);??????????? 
>>>>>>>
>>>>>>> int stepCount = 0;???????? // number of steps the motor has taken
>>>>>>>
>>>>>>> void setup() {
>>>>>>> ? // initialize the serial port:
>>>>>>> ? Serial.begin(9600);
>>>>>>> }
>>>>>>>
>>>>>>> void loop() {
>>>>>>> ? // step one step:
>>>>>>> ? myStepper.step(1);
>>>>>>> ? Serial.print("steps:" );
>>>>>>> ? Serial.println(stepCount);
>>>>>>> ? stepCount++;
>>>>>>> ? delay(100);
>>>>>>> }
>>>>>>>
>>>>>>>
>>>>>>> Spec:-
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Voltage : 5V
>>>>>>> Diameter : 28mm
>>>>>>> Step angle : 5.625 x 1 / 64
>>>>>>> Reduction ratio : 1 / 64
>>>>>>> 5 Line 4 phase
>>>>>>> Current draw : 92mA
>>>>>>> Operating Frequency : 100pps
>>>>>>> Dimensions : 35mm x 28mm
>>>>>>> 4 mounting holes
>>>>>>> ULN2003 chip
>>>>>>> A, B, C, D four-phase status LED
>>>>>>>
>>>>>>> ___
>>>>>>>
>>>>>>>
>>>>>>> Now the divide by 64 seems to be a stumbling block ?
>>>>>>>
>>>>>>> What I'm trying to do is use the 1.8 degree characteristic to get 100 pulses to achieve a total rotation of 180 degrees to the shaft.
>>>>>>>
>>>>>>> A period of anything up to two minutes is fine for the 180 degree rotation.
>>>>>>>
>>>>>>> So far it twitches a bit but not much else e.g. not very exciting.
>>>>>>>
>>>>>>> Should the?? stepsPerRevolution = 1440 be changed to stepsPerRevolution = 6400 ?
>>>>>>>
>>>>>>> Maybe I've got the Arduino pins a tad wrong ?
>>>>>>>
>>>>>>> :? )
>>>>>>>
>>>>>>>
>>>>>>> Tim_1
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 18 April 2015 at 19:58, Justin Mitchell <justin at swansea.hackspace.org.uk> wrote:
>>>>>>>>
>>>>>>>> Yes, one motor one step-stick.
>>>>>>>>
>>>>>>>> Control it from an arduino, or any other micro, just needs two GPIO
>>>>>>>> lines.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
>>>>>>>> > So a single 'step-stick' would do it ?
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Many thanks for responding !
>>>>>>>> >
>>>>>>>> > :? )))
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > Tim_1
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <justin at discordia.org.uk>
>>>>>>>> > wrote:
>>>>>>>> >? ? ? ? ?It's an interface for all the stuff you need to drive a 3d
>>>>>>>> >? ? ? ? ?printer, takes 5 step-sticks for stepper driving, has power
>>>>>>>> >? ? ? ? ?MOSFETs to pwm the hotends and heated bed, and a bunch of
>>>>>>>> >? ? ? ? ?inputs for end stops and thermistors. You plug it into an
>>>>>>>> >? ? ? ? ?Arduino mega board, install some software like Marlin and it
>>>>>>>> >? ? ? ? ?can run your printer, or mixed to control a CNC mill or laser
>>>>>>>> >? ? ? ? ?cutter.
>>>>>>>> >
>>>>>>>> >? ? ? ? ?Way over kill for driving one motor :)
>>>>>>>> >
>>>>>>>> >? ? ? ? ?On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com>
>>>>>>>> >? ? ? ? ?wrote:
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> Wow !? Loads of interesting links and ideas !
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> Its a very slow rotation, so inertia is not a problem.
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> Is a 'RAMPS 1.4' useful ?? what does it do ?
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> Many thanks to all who have responded !
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> :? )))
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> Tim_1
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?> On 18 April 2015 at 13:57, oliver Oliver
>>>>>>>> >? ? ? ? ?<oliver at oliverjenkins.com> wrote:
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>> Think about pulleys or gears.? I don't know if you want the
>>>>>>>> >? ? ? ? ?pole to stop at a particular point or not.? Inertia in 1m pole
>>>>>>>> >? ? ? ? ?will be higher than braking force of a stepper motor.? So it
>>>>>>>> >? ? ? ? ?will continue to spin after you stop the motor. Giving you an
>>>>>>>> >? ? ? ? ?unpredictable 180 plus rotation.
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>> For a pulley arrangement look at t5? timing belts.? you can
>>>>>>>> >? ? ? ? ?easily print the pulleys using a reprap.? There are libraries
>>>>>>>> >? ? ? ? ?on thingiverse.
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>> A worm gear would be better,? but you can't print those.
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>> Oli
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>> On 18 Apr 2015 12:33, "Tim Moore" <timmoore47 at gmail.com>
>>>>>>>> >? ? ? ? ?wrote:
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> I'm trying to carefully rorate a metre long light weight
>>>>>>>> >? ? ? ? ?pole through 180 degrees.
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> I've got a Stepper Motor type 28BYJ-48 working fine, but
>>>>>>>> >? ? ? ? ?I'm sure I need one that is a bit more chunky !
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high torque
>>>>>>>> >? ? ? ? ?1.8 degree stepper motor? on the way with a controller card
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> But I've not got a very clear vision yet what else I might
>>>>>>>> >? ? ? ? ?need and if there is any Arduino example software listing that
>>>>>>>> >? ? ? ? ?would be good to use to get it to work ?
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> I don't want to reinvent the wheel !? *LOL*
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> Any thoughts anyone ?
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> :? )))
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> Tim_1
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>> _______________________________________________
>>>>>>>> >? ? ? ? ?>>> Hackspace mailing list
>>>>>>>> >? ? ? ? ?>>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> >? ? ? ? ?>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>> >? ? ? ? ?>>>
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>> _______________________________________________
>>>>>>>> >? ? ? ? ?>> Hackspace mailing list
>>>>>>>> >? ? ? ? ?>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> >? ? ? ? ?>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>> >? ? ? ? ?>>
>>>>>>>> >? ? ? ? ?>
>>>>>>>> >? ? ? ? ?_______________________________________________
>>>>>>>> >? ? ? ? ?Hackspace mailing list
>>>>>>>> >? ? ? ? ?Hackspace at swansea.hackspace.org.uk
>>>>>>>> >? ? ? ? ?http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > _______________________________________________
>>>>>>>> > Hackspace mailing list
>>>>>>>> > Hackspace at swansea.hackspace.org.uk
>>>>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Hackspace mailing list
>>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>

From timmoore47 at gmail.com  Sat May  9 14:09:14 2015
From: timmoore47 at gmail.com (Tim Moore)
Date: Sat, 9 May 2015 14:09:14 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
	stepper motor.
In-Reply-To: <037427b5-e5ae-479d-83cc-4298ec86c762@email.android.com>
References: <CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>
	<037427b5-e5ae-479d-83cc-4298ec86c762@email.android.com>
Message-ID: <CAAEY5oMF38h=7wtM8zxBcskEL_K=FR5njQ3CkLwYHLeDBK1Y+g@mail.gmail.com>

What sort of current can a A4988 carry ?

Many thanks for responding.

(Can it support the Stepper Motor I'm using?)

:  )

Tim_1

On 9 May 2015 at 10:32, Justin Mitchell <justin at discordia.org.uk> wrote:

> This does seem the hard way to do things when something like an A4988
> stepstick is a similar price and way simpler to use.
>
> Did you need some specifically higher current or other requirement?
>
> On 9 May 2015 7:09 am, Tim Moore <timmoore47 at gmail.com> wrote:
> >
> > Magic blue smoke was released !  :  (((   So I've ordered another from
> China.
> >
> > I'll double check everything, as H configuration can short +12V to
> ground so easily !   Software can do that ! ?
> >
> > On another matter the L298N has two little cans marked '220 35V UT',
> I've pnly recently come across them.  What are they ?
> >
> > Is there any favoured software to drive them that is known to work
> Arduino friendly?
> >
> > Many many thanks for responding !
> >
> > :  )))
> >
> > Tim_1
> >
> > On 8 May 2015 at 22:03, Ceri Clatworthy <ceri.clatworthy at gmail.com>
> wrote:
> >>
> >> Fetch in in Monday an we will get it going
> >>
> >> Unless the magic blue smoke has been released
> >> Ceri
> >>
> >> On 8 May 2015 17:59, "Tim Moore" <timmoore47 at gmail.com> wrote:
> >>>
> >>> Well made sort of progress:-
> >>>
> >>> Got a 3D stepper type   17H16-2994S  in the hope it would be powerful
> enough to drive the thing I want to rotate.
> >>>
> >>> Based on an Arduino Uno with a L298N stepper controller,
> >>>
> >>> I found this software which I adapted for just one motor.
> >>>
> >>> quote
> >>>
> >>> // connect motor controller pins to Arduino digital pins
> >>> // motor one
> >>> int enA = 10;
> >>> int in1 = 9;
> >>> int in2 = 8;
> >>> // motor two
> >>> // int enB = 5;
> >>> // int in3 = 7;
> >>> // int in4 = 6;
> >>> void setup()
> >>> {
> >>>   // set all the motor control pins to outputs
> >>>   pinMode(enA, OUTPUT);
> >>>   // pinMode(enB, OUTPUT);
> >>>   pinMode(in1, OUTPUT);
> >>>   pinMode(in2, OUTPUT);
> >>>   // pinMode(in3, OUTPUT);
> >>>   // pinMode(in4, OUTPUT);
> >>> }
> >>> void demoOne()
> >>> {
> >>>   // this function will run the motors in both directions at a fixed
> speed
> >>>   // turn on motor A
> >>>   digitalWrite(in1, HIGH);
> >>>   digitalWrite(in2, LOW);
> >>>   // set speed to 200 out of possible range 0~255
> >>>   analogWrite(enA, 200);
> >>>   // turn on motor B
> >>>   // digitalWrite(in3, HIGH);
> >>>   // digitalWrite(in4, LOW);
> >>>   // set speed to 200 out of possible range 0~255
> >>>   // analogWrite(enB, 200);
> >>>   delay(2000);
> >>>   // now change motor directions
> >>>   digitalWrite(in1, LOW);
> >>>   digitalWrite(in2, HIGH);
> >>>   // digitalWrite(in3, LOW);
> >>>   // digitalWrite(in4, HIGH);
> >>>   //delay(2000);
> >>>   // now turn off motors
> >>>   digitalWrite(in1, LOW);
> >>>   digitalWrite(in2, LOW);
> >>>   // digitalWrite(in3, LOW);
> >>>   // digitalWrite(in4, LOW);
> >>> }
> >>> void demoTwo()
> >>> {
> >>>   // this function will run the motors across the range of possible
> speeds
> >>>   // note that maximum speed is determined by the motor itself and the
> operating voltage
> >>>   // the PWM values sent by analogWrite() are fractions of the maximum
> speed possible
> >>>   // by your hardware
> >>>   // turn on motors
> >>>   digitalWrite(in1, LOW);
> >>>   digitalWrite(in2, HIGH);
> >>>   // digitalWrite(in3, LOW);
> >>>   // digitalWrite(in4, HIGH);
> >>>   // accelerate from zero to maximum speed
> >>>   for (int i = 0; i < 256; i++)
> >>>   {
> >>>     analogWrite(enA, i);
> >>>     // analogWrite(enB, i);
> >>>     delay(20);
> >>>   }
> >>>   // decelerate from maximum speed to zero
> >>>   for (int i = 255; i >= 0; --i)
> >>>   {
> >>>     analogWrite(enA, i);
> >>>     // analogWrite(enB, i);
> >>>     delay(20);
> >>>   }
> >>>   // now turn off motors
> >>>   digitalWrite(in1, LOW);
> >>>   digitalWrite(in2, LOW);
> >>>   // digitalWrite(in3, LOW);
> >>>   // digitalWrite(in4, LOW);
> >>> }
> >>> void loop()
> >>> {
> >>>   demoOne();
> >>>   delay(1000);
> >>>   demoTwo();
> >>>   delay(1000);
> >>> }
> >>>
> >>>
> >>> Wired it all up with a 12V 5A power supply and the stepper shaft
> twitched a bit , but the L298N emitted a puff of smoke and the heatsink got
> very hot !
> >>>
> >>> Now I've checked the Arduino Uno and it seems aok.
> >>>
> >>> The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor
> pin, ditto earth to nearest pin.
> >>>
> >>> Applying 1.5V at 0.8 Amp to the each of the pair of wires the shaft
> stops being rotatable.  the two motor wires are at infinity.
> >>>
> >>> I've assumed that's a sign that I've not killed the stepper motor.
> >>>
> >>> Now before I get another L298N, I thought a few precautions are worth
> while !  Slaying a series of L298N's doesn't seem that smart !!!  *LOL*
> >>>
> >>> Any thoughts from anyone as to what to investigate next ?  (I thought
> perhaps the software was wrong for this model of stepper motor ?  I'm
> capable of making crass errors here..)
> >>>
> >>> :  )
> >>>
> >>> Tim_1
> >>>
> >>> On 19 April 2015 at 11:41, Ceri Clatworthy <ceri.clatworthy at gmail.com>
> wrote:
> >>>>
> >>>> Reverse. ..
> >>>>
> >>>> If ULN 2003...
> >>>> The wiggle pins in other direction! !!
> >>>>
> >>>> On 19 Apr 2015 11:23, "Tim Moore" <timmoore47 at gmail.com> wrote:
> >>>>>
> >>>>> Many thanks Ceri for the tip !  Greatly appreciated !
> >>>>>
> >>>>> :  )))
> >>>>>
> >>>>> Tim_1
> >>>>>
> >>>>> On 19 April 2015 at 11:21, Tim Moore <timmoore47 at gmail.com> wrote:
> >>>>>>
> >>>>>> Update:-
> >>>>>>
> >>>>>> It may not be very riveting but the change to 6400 (and the
> deletion of */ at the top of the code worked fine !
> >>>>>>
> >>>>>> the count for
> >>>>>> 90  deg was 500  and  time 52.5 secs
> >>>>>> 180 deg was 1000             105
> >>>>>> 270 deg was 1500             157.5
> >>>>>> 360 deg was 2000             210 secs ( 3m 30 secs)  approx
> >>>>>>
> >>>>>> (I hope !)
> >>>>>>
> >>>>>> Now this might be very boring, but it also might help a Newbie to
> stepper motors test their new purchase out too !
> >>>>>>
> >>>>>> Anyone know if the controller board can make it go in reverse ?
> >>>>>>
> >>>>>> :  )))
> >>>>>>
> >>>>>> Tim_1
> >>>>>>
> >>>>>> On 19 April 2015 at 10:23, Tim Moore <timmoore47 at gmail.com> wrote:
> >>>>>>>
> >>>>>>> I've been trying to get this working on a   28BYJ-48 with ULN2003
> cheapest stepper motor set up.
> >>>>>>>
> >>>>>>>  Created 30 Nov. 2009
> >>>>>>>  by Tom Igoe
> >>>>>>>
> >>>>>>>  */
> >>>>>>>
> >>>>>>> #include <Stepper.h>
> >>>>>>>
> >>>>>>> const int stepsPerRevolution = 1440;  // change this to fit the
> number of steps per revolution
> >>>>>>>                                      // for your motor
> >>>>>>>
> >>>>>>> // initialize the stepper library on pins 8 through 11:
> >>>>>>> Stepper myStepper(stepsPerRevolution, 8,9,10,11);
> >>>>>>>
> >>>>>>> int stepCount = 0;         // number of steps the motor has taken
> >>>>>>>
> >>>>>>> void setup() {
> >>>>>>>   // initialize the serial port:
> >>>>>>>   Serial.begin(9600);
> >>>>>>> }
> >>>>>>>
> >>>>>>> void loop() {
> >>>>>>>   // step one step:
> >>>>>>>   myStepper.step(1);
> >>>>>>>   Serial.print("steps:" );
> >>>>>>>   Serial.println(stepCount);
> >>>>>>>   stepCount++;
> >>>>>>>   delay(100);
> >>>>>>> }
> >>>>>>>
> >>>>>>>
> >>>>>>> Spec:-
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> Voltage : 5V
> >>>>>>> Diameter : 28mm
> >>>>>>> Step angle : 5.625 x 1 / 64
> >>>>>>> Reduction ratio : 1 / 64
> >>>>>>> 5 Line 4 phase
> >>>>>>> Current draw : 92mA
> >>>>>>> Operating Frequency : 100pps
> >>>>>>> Dimensions : 35mm x 28mm
> >>>>>>> 4 mounting holes
> >>>>>>> ULN2003 chip
> >>>>>>> A, B, C, D four-phase status LED
> >>>>>>>
> >>>>>>> ___
> >>>>>>>
> >>>>>>>
> >>>>>>> Now the divide by 64 seems to be a stumbling block ?
> >>>>>>>
> >>>>>>> What I'm trying to do is use the 1.8 degree characteristic to get
> 100 pulses to achieve a total rotation of 180 degrees to the shaft.
> >>>>>>>
> >>>>>>> A period of anything up to two minutes is fine for the 180 degree
> rotation.
> >>>>>>>
> >>>>>>> So far it twitches a bit but not much else e.g. not very exciting.
> >>>>>>>
> >>>>>>> Should the   stepsPerRevolution = 1440 be changed to
> stepsPerRevolution = 6400 ?
> >>>>>>>
> >>>>>>> Maybe I've got the Arduino pins a tad wrong ?
> >>>>>>>
> >>>>>>> :  )
> >>>>>>>
> >>>>>>>
> >>>>>>> Tim_1
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> On 18 April 2015 at 19:58, Justin Mitchell <
> justin at swansea.hackspace.org.uk> wrote:
> >>>>>>>>
> >>>>>>>> Yes, one motor one step-stick.
> >>>>>>>>
> >>>>>>>> Control it from an arduino, or any other micro, just needs two
> GPIO
> >>>>>>>> lines.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:
> >>>>>>>> > So a single 'step-stick' would do it ?
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> > Many thanks for responding !
> >>>>>>>> >
> >>>>>>>> > :  )))
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> > Tim_1
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> > On 18 April 2015 at 15:09, Justin Mitchell <
> justin at discordia.org.uk>
> >>>>>>>> > wrote:
> >>>>>>>> >         It's an interface for all the stuff you need to drive a
> 3d
> >>>>>>>> >         printer, takes 5 step-sticks for stepper driving, has
> power
> >>>>>>>> >         MOSFETs to pwm the hotends and heated bed, and a bunch
> of
> >>>>>>>> >         inputs for end stops and thermistors. You plug it into
> an
> >>>>>>>> >         Arduino mega board, install some software like Marlin
> and it
> >>>>>>>> >         can run your printer, or mixed to control a CNC mill or
> laser
> >>>>>>>> >         cutter.
> >>>>>>>> >
> >>>>>>>> >         Way over kill for driving one motor :)
> >>>>>>>> >
> >>>>>>>> >         On 18 Apr 2015 2:51 pm, Tim Moore <timmoore47 at gmail.com
> >
> >>>>>>>> >         wrote:
> >>>>>>>> >         >
> >>>>>>>> >         > Wow !  Loads of interesting links and ideas !
> >>>>>>>> >         >
> >>>>>>>> >         > Its a very slow rotation, so inertia is not a problem.
> >>>>>>>> >         >
> >>>>>>>> >         > Is a 'RAMPS 1.4' useful ?  what does it do ?
> >>>>>>>> >         >
> >>>>>>>> >         > Many thanks to all who have responded !
> >>>>>>>> >         >
> >>>>>>>> >         > :  )))
> >>>>>>>> >         >
> >>>>>>>> >         > Tim_1
> >>>>>>>> >         >
> >>>>>>>> >         > On 18 April 2015 at 13:57, oliver Oliver
> >>>>>>>> >         <oliver at oliverjenkins.com> wrote:
> >>>>>>>> >         >>
> >>>>>>>> >         >> Think about pulleys or gears.  I don't know if you
> want the
> >>>>>>>> >         pole to stop at a particular point or not.  Inertia in
> 1m pole
> >>>>>>>> >         will be higher than braking force of a stepper motor.
> So it
> >>>>>>>> >         will continue to spin after you stop the motor. Giving
> you an
> >>>>>>>> >         unpredictable 180 plus rotation.
> >>>>>>>> >         >>
> >>>>>>>> >         >> For a pulley arrangement look at t5  timing belts.
> you can
> >>>>>>>> >         easily print the pulleys using a reprap.  There are
> libraries
> >>>>>>>> >         on thingiverse.
> >>>>>>>> >         >>
> >>>>>>>> >         >> A worm gear would be better,  but you can't print
> those.
> >>>>>>>> >         >>
> >>>>>>>> >         >> Oli
> >>>>>>>> >         >>
> >>>>>>>> >         >> On 18 Apr 2015 12:33, "Tim Moore" <
> timmoore47 at gmail.com>
> >>>>>>>> >         wrote:
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> I'm trying to carefully rorate a metre long light
> weight
> >>>>>>>> >         pole through 180 degrees.
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> I've got a Stepper Motor type 28BYJ-48 working
> fine, but
> >>>>>>>> >         I'm sure I need one that is a bit more chunky !
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high
> torque
> >>>>>>>> >         1.8 degree stepper motor  on the way with a controller
> card
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> But I've not got a very clear vision yet what else
> I might
> >>>>>>>> >         need and if there is any Arduino example software
> listing that
> >>>>>>>> >         would be good to use to get it to work ?
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> I don't want to reinvent the wheel !  *LOL*
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> Any thoughts anyone ?
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> :  )))
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> Tim_1
> >>>>>>>> >         >>>
> >>>>>>>> >         >>> _______________________________________________
> >>>>>>>> >         >>> Hackspace mailing list
> >>>>>>>> >         >>> Hackspace at swansea.hackspace.org.uk
> >>>>>>>> >         >>>
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>>>>> >         >>>
> >>>>>>>> >         >>
> >>>>>>>> >         >> _______________________________________________
> >>>>>>>> >         >> Hackspace mailing list
> >>>>>>>> >         >> Hackspace at swansea.hackspace.org.uk
> >>>>>>>> >         >>
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>>>>> >         >>
> >>>>>>>> >         >
> >>>>>>>> >         _______________________________________________
> >>>>>>>> >         Hackspace mailing list
> >>>>>>>> >         Hackspace at swansea.hackspace.org.uk
> >>>>>>>> >
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> >
> >>>>>>>> > _______________________________________________
> >>>>>>>> > Hackspace mailing list
> >>>>>>>> > Hackspace at swansea.hackspace.org.uk
> >>>>>>>> > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> _______________________________________________
> >>>>>>>> Hackspace mailing list
> >>>>>>>> Hackspace at swansea.hackspace.org.uk
> >>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>>>>
> >>>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> Hackspace mailing list
> >>>>> Hackspace at swansea.hackspace.org.uk
> >>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>>
> >>>>
> >>>> _______________________________________________
> >>>> Hackspace mailing list
> >>>> Hackspace at swansea.hackspace.org.uk
> >>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Hackspace mailing list
> >>> Hackspace at swansea.hackspace.org.uk
> >>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>>
> >>
> >> _______________________________________________
> >> Hackspace mailing list
> >> Hackspace at swansea.hackspace.org.uk
> >> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >>
> >
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From justin at discordia.org.uk  Sat May  9 16:08:55 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Sat, 09 May 2015 16:08:55 +0100
Subject: [Swansea Hackspace] Arduino Uno interface to a 3D printer
 stepper motor.
In-Reply-To: <CAAEY5oMF38h=7wtM8zxBcskEL_K=FR5njQ3CkLwYHLeDBK1Y+g@mail.gmail.com>
References: <CAAEY5oNe0kkc-TjkuVGkewk+CJwxaf=5OH4PWPve9EKR7_qiRQ@mail.gmail.com>
	<037427b5-e5ae-479d-83cc-4298ec86c762@email.android.com>
	<CAAEY5oMF38h=7wtM8zxBcskEL_K=FR5njQ3CkLwYHLeDBK1Y+g@mail.gmail.com>
Message-ID: <1431184135.20164.8.camel@emerald.geode.org.uk>

On Sat, 2015-05-09 at 14:09 +0100, Tim Moore wrote:
> What sort of current can a A4988 carry ?
> 
> 
> Many thanks for responding.
> 
> 
> (Can it support the Stepper Motor I'm using?)

Looking back through the archive...

> 28BYJ-48 
5 wire unipolar - no

> 17HS16-2004S NEMA 17 
4 wire bipolar stepper
Most definitely yes

This is exactly the kind of motor used in 3d printers, and the A4988 is
one of the most common things used in 3d printer control boards.

https://www.pololu.com/product/1182
Motor drive: 8v to 32v
Motor current:
 uncooled: 1A per coil
 heatsink/forced air: 2A per coil.

the little trim pot you see on the board adjusts the built in current
limiter.

http://www.aliexpress.com/item//32296096239.html
87p including postage, cheaper in quantity.

no complex phasing or other driver code required, just supply one pulse
per step required, logic inputs to select direction and step size if
wanted.





From djdavies83 at hotmail.com  Sun May 10 21:36:35 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Sun, 10 May 2015 21:36:35 +0100
Subject: [Swansea Hackspace] Anyone used this?
Message-ID: <DUB406-EAS15D5ED935BF9015AE6AEF1C6DC0@phx.gbl>

https://github.com/esp8266/arduino

If I read it correcrly, this makes arguing ide compatible with the esp8266


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.
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From justin at discordia.org.uk  Sun May 10 22:20:36 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Sun, 10 May 2015 22:20:36 +0100
Subject: [Swansea Hackspace] Anyone used this?
In-Reply-To: <DUB406-EAS15D5ED935BF9015AE6AEF1C6DC0@phx.gbl>
Message-ID: <e3b51d42-5911-4c24-a6ee-f5a1ef774a35@email.android.com>

It has been talked about a lot on the web, but I have yet to try it. I know it allows programming the esp8266 from the Arduino ide, but I have yet to figure out how much else it integrates

On 10 May 2015 9:36 pm, David Davies-Day <djdavies83 at hotmail.com> wrote:
>
> https://github.com/esp8266/arduino
>
> If I read it correcrly, this makes arguing ide compatible with the esp8266
>
>
> No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.

From em at preseli.com  Mon May 11 14:31:27 2015
From: em at preseli.com (Emyr Morris)
Date: Mon, 11 May 2015 14:31:27 +0100
Subject: [Swansea Hackspace] 3d printing
Message-ID: <CAGAFX7PC=hCSLXuH-hzTk6XLVbdQa+4dEtBqtPy6gk_ZB+mdjg@mail.gmail.com>

I've loaded

A1 Spacer.gcode

into the Octoprint.

It is just under 8m of filament, the last I looked Blue was loaded into the
printer.

If somebody would be kind enough to start the print off for me I would be
grateful. I should be in at about 7ish regardless. I've already asked Tim
but he warned me that he might forget :-) :-) :-) :-)


If anybody else has something more pressing then that is fine - thank you

Emyr



-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
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From gwiondavies at live.co.uk  Mon May 11 18:00:35 2015
From: gwiondavies at live.co.uk (Gwion Davies)
Date: Mon, 11 May 2015 18:00:35 +0100
Subject: [Swansea Hackspace] 3d printing
In-Reply-To: <CAGAFX7PC=hCSLXuH-hzTk6XLVbdQa+4dEtBqtPy6gk_ZB+mdjg@mail.gmail.com>
References: <CAGAFX7PC=hCSLXuH-hzTk6XLVbdQa+4dEtBqtPy6gk_ZB+mdjg@mail.gmail.com>
Message-ID: <DUB404-EAS420F61A06113FA3FFAB79358ADB0@phx.gbl>

I can start your print at 6ish. If you want?



> On 11 May 2015, at 14:31, Emyr Morris <em at preseli.com> wrote:
> 
> I've loaded
> 
> A1 Spacer.gcode 
> 
> into the Octoprint.
> 
> It is just under 8m of filament, the last I looked Blue was loaded into the printer.
> 
> If somebody would be kind enough to start the print off for me I would be grateful. I should be in at about 7ish regardless. I've already asked Tim but he warned me that he might forget :-) :-) :-) :-)
> 
> 
> If anybody else has something more pressing then that is fine - thank you
> 
> Emyr
> 
> 
> 
> -- 
> This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed.
>  
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace


From dick at acm.org  Thu May 14 11:34:11 2015
From: dick at acm.org (Dick Porter)
Date: Thu, 14 May 2015 11:34:11 +0100
Subject: [Swansea Hackspace] Ideas for more maker kit
Message-ID: <307287D3-196A-42C3-8171-746DADBF093E@acm.org>

Here's an article in this week's LWN: Free software and fashion tech, http://lwn.net/SubscriberLink/643941/f03aae16fe233687/

"Other challenges are smaller, such as the difficulty of building custom hardware (such as the open-hardware knitting machine). Here, Dang said that the Fashiontec community is trying to reach out more to the maker movement?hacker spaces in particular, which she said could all benefit from adding a sewing or knitting machine to their stable of 3D printers and laser cutters."

- Dick



From sharon at swansea.hackspace.org.uk  Fri May 15 20:40:18 2015
From: sharon at swansea.hackspace.org.uk (Sharon Mitchell)
Date: Fri, 15 May 2015 20:40:18 +0100
Subject: [Swansea Hackspace] Ideas for more maker kit
In-Reply-To: <307287D3-196A-42C3-8171-746DADBF093E@acm.org>
References: <307287D3-196A-42C3-8171-746DADBF093E@acm.org>
Message-ID: <20150515204018.666565ab@picobox.apathetic.discordia.org.uk>

My 'Make it Sew' workshops (third Thursday of month) were so poorly
attended my sewing machine came home with me.  I believe there's a
laser cutter on that desk now..




From djdavies83 at hotmail.com  Sat May 16 09:38:44 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Sat, 16 May 2015 09:38:44 +0100
Subject: [Swansea Hackspace] Anyone in today?
Message-ID: <DUB406-EAS3105CE5D51D02217233A51C6C60@phx.gbl>

Hi Gang, anyone in today?

Really appreciate some help with arduino sonar (sr-04) and I don't have my Keys.?


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.
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From eclipse at sucs.org  Sat May 16 10:49:24 2015
From: eclipse at sucs.org (Tim)
Date: Sat, 16 May 2015 10:49:24 +0100
Subject: [Swansea Hackspace] Ideas for more maker kit
In-Reply-To: <20150515204018.666565ab@picobox.apathetic.discordia.org.uk>
References: <307287D3-196A-42C3-8171-746DADBF093E@acm.org>
	<20150515204018.666565ab@picobox.apathetic.discordia.org.uk>
Message-ID: <555712A4.40800@sucs.org>

The turnout to these was rather disappointing and I fully understand why 
the desision was made not to continue. However we do now have a page 
(http://swansea.hackspace.org.uk/Meetings/Suggestions) for people to 
suggest workshops they would like to attend and/or run so we can gauge 
interest in an attempt to prevent this kind of disappointment. If you 
would like some sewing (or anything else) workshops please request or 
like things there so we know people want and we can then make them happen.
The laser cutter is only in that space temporally while we work on it to 
make it safe and ready for use, it will move to a more permanent home 
after that.

Tim

On 15/05/15 20:40, Sharon Mitchell wrote:
> My 'Make it Sew' workshops (third Thursday of month) were so poorly
> attended my sewing machine came home with me.  I believe there's a
> laser cutter on that desk now..
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace



From djdavies83 at hotmail.com  Sun May 17 18:39:01 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Sun, 17 May 2015 18:39:01 +0100
Subject: [Swansea Hackspace] Swansea dad prints himself a new hand
Message-ID: <DUB406-EAS21574AF914C5CB7E3DC55D0C6C50@phx.gbl>

He went through e-Nable, he is looking to raise ?1000 for his own printer, I thought we may want to invite him over to see ours, maybe help him build his own.

http://www.southwales-eveningpost.co.uk/Swansea-dad-prints-new-hand-inspired-Iron-Man/story-26518585-detail/story.html#OiHHsT3X97fZ4xFu.03


I did a search for him on Facebook but could not find him, perhaps if one of our directors contacted the paper they let him know about us, maybe do a follow up with us helping him.


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.
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From neil at aurinia.co.uk  Sun May 17 18:53:13 2015
From: neil at aurinia.co.uk (Neil Jones)
Date: Sun, 17 May 2015 18:53:13 +0100
Subject: [Swansea Hackspace] Swansea dad prints himself a new hand
In-Reply-To: <DUB406-EAS21574AF914C5CB7E3DC55D0C6C50@phx.gbl>
References: <DUB406-EAS21574AF914C5CB7E3DC55D0C6C50@phx.gbl>
Message-ID: <5558D589.20708@aurinia.co.uk>


On 17/05/15 18:39, David Davies-Day wrote:
> He went through e-Nable, he is looking to raise ?1000 for his own 
> printer, I thought we may want to invite him over to see ours, maybe 
> help him build his own.
>
> http://www.southwales-eveningpost.co.uk/Swansea-dad-prints-new-hand-inspired-Iron-Man/story-26518585-detail/story.html#OiHHsT3X97fZ4xFu.03
>
>
> I did a search for him on Facebook but could not find him, perhaps if 
> one of our directors contacted the paper they let him know about us, 
> maybe do a follow up with us helping him.
>

There is an opportunity here for us to get some publicity for 
ourselves.  One of the directors write a letter to the paper along the 
lines of how wonderful it is that he has made his own hand . How 
wonderful the technology is, and that several of our members have these 
wonderful machines as do we and we would be happy to see if we could 
help him or anyone else who wants to learn about the technology.

I'd be happy to draft something if it is th
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From em at preseli.com  Sun May 17 23:09:20 2015
From: em at preseli.com (Emyr Morris)
Date: Sun, 17 May 2015 23:09:20 +0100
Subject: [Swansea Hackspace] Swansea dad prints himself a new hand
In-Reply-To: <5558D589.20708@aurinia.co.uk>
References: <DUB406-EAS21574AF914C5CB7E3DC55D0C6C50@phx.gbl>
	<5558D589.20708@aurinia.co.uk>
Message-ID: <CAGAFX7O4P7d08HMRvALL4xh1d2ZARxH1zds6fxVfhz53aA2fLA@mail.gmail.com>

how about dropping a note to e-nable offering a hand?

On 17 May 2015 at 18:53, Neil Jones <neil at aurinia.co.uk> wrote:
>
> On 17/05/15 18:39, David Davies-Day wrote:
>
> He went through e-Nable, he is looking to raise ?1000 for his own printer, I
> thought we may want to invite him over to see ours, maybe help him build his
> own.
>
> http://www.southwales-eveningpost.co.uk/Swansea-dad-prints-new-hand-inspired-Iron-Man/story-26518585-detail/story.html#OiHHsT3X97fZ4xFu.03
>
>
> I did a search for him on Facebook but could not find him, perhaps if one of
> our directors contacted the paper they let him know about us, maybe do a
> follow up with us helping him.
>
>
> There is an opportunity here for us to get some publicity for ourselves.
> One of the directors write a letter to the paper along the lines of how
> wonderful it is that he has made his own hand . How wonderful the technology
> is, and that several of our members have these wonderful machines as do we
> and we would be happy to see if we could help him or anyone else who wants
> to learn about the technology.
>
> I'd be happy to draft something if it is th
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>



-- 
This e-mail and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy
atynt yn unig.


From djdavies83 at hotmail.com  Sun May 17 23:22:25 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Sun, 17 May 2015 23:22:25 +0100
Subject: [Swansea Hackspace] Swansea dad prints himself a new hand
Message-ID: <DUB406-EAS4315378EB833443E0EBD2B3C6C50@phx.gbl>

"how about dropping a note to e-nable offering a hand?"

Haha BA-DUM-TISSSSSHHH! I like what you there Emyr, but seriously though we do need to contact Stephan, the paper, e-nable/all the above to see how much we can help.


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.

-------- Original message --------
From: Emyr Morris <em at preseli.com>
Date:17/05/2015 23:10 (GMT+00:00)
To: Swansea Hackspace <hackspace at swansea.hackspace.org.uk>
Cc:
Subject: Re: [Swansea Hackspace] Swansea dad prints himself a new hand 

how about dropping a note to e-nable offering a hand?

On 17 May 2015 at 18:53, Neil Jones <neil at aurinia.co.uk> wrote:
>
> On 17/05/15 18:39, David Davies-Day wrote:
>
> He went through e-Nable, he is looking to raise ?1000 for his own printer, I
> thought we may want to invite him over to see ours, maybe help him build his
> own.
>
> http://www.southwales-eveningpost.co.uk/Swansea-dad-prints-new-hand-inspired-Iron-Man/story-26518585-detail/story.html#OiHHsT3X97fZ4xFu.03
>
>
> I did a search for him on Facebook but could not find him, perhaps if one of
> our directors contacted the paper they let him know about us, maybe do a
> follow up with us helping him.
>
>
> There is an opportunity here for us to get some publicity for ourselves.
> One of the directors write a letter to the paper along the lines of how
> wonderful it is that he has made his own hand . How wonderful the technology
> is, and that several of our members have these wonderful machines as do we
> and we would be happy to see if we could help him or anyone else who wants
> to learn about the technology.
>
> I'd be happy to draft something if it is th
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>



-- 
This e-mail and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy
atynt yn unig.
_______________________________________________
Hackspace mailing list
Hackspace at swansea.hackspace.org.uk
http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
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From em at preseli.com  Sun May 17 23:39:31 2015
From: em at preseli.com (Emyr Morris)
Date: Sun, 17 May 2015 23:39:31 +0100
Subject: [Swansea Hackspace] Swansea dad prints himself a new hand
In-Reply-To: <DUB406-EAS4315378EB833443E0EBD2B3C6C50@phx.gbl>
References: <DUB406-EAS4315378EB833443E0EBD2B3C6C50@phx.gbl>
Message-ID: <CAGAFX7Of8O95gRYC8Q6tacjqNJDggvexAo0O83ivwqzCcN+f8w@mail.gmail.com>

I'm not denying any of that - but to contact stephen - the best way is
via the people who helped him print the first hand - the whole ethos
of the enable project is that people like us join enable so next time
instead of having to travel to say cardiff or bristol, he (ar any
other person who needs help) would come to us in their own city...

once we have made that contact then we can do all the other things....

Em

On 17 May 2015 at 23:22, David Davies-Day <djdavies83 at hotmail.com> wrote:
> "how about dropping a note to e-nable offering a hand?"
>
> Haha BA-DUM-TISSSSSHHH! I like what you there Emyr, but seriously though we
> do need to contact Stephan, the paper, e-nable/all the above to see how much
> we can help.
>
>
> No animals were harmed in the making of this email. However, several
> thousand electrons were severely inconvenienced.
>
> -------- Original message --------
> From: Emyr Morris <em at preseli.com>
> Date:17/05/2015 23:10 (GMT+00:00)
> To: Swansea Hackspace <hackspace at swansea.hackspace.org.uk>
> Cc:
> Subject: Re: [Swansea Hackspace] Swansea dad prints himself a new hand
>
> how about dropping a note to e-nable offering a hand?
>
> On 17 May 2015 at 18:53, Neil Jones <neil at aurinia.co.uk> wrote:
>>
>> On 17/05/15 18:39, David Davies-Day wrote:
>>
>> He went through e-Nable, he is looking to raise ?1000 for his own printer,
>> I
>> thought we may want to invite him over to see ours, maybe help him build
>> his
>> own.
>>
>>
>> http://www.southwales-eveningpost.co.uk/Swansea-dad-prints-new-hand-inspired-Iron-Man/story-26518585-detail/story.html#OiHHsT3X97fZ4xFu.03
>>
>>
>> I did a search for him on Facebook but could not find him, perhaps if one
>> of
>> our directors contacted the paper they let him know about us, maybe do a
>> follow up with us helping him.
>>
>>
>> There is an opportunity here for us to get some publicity for ourselves.
>> One of the directors write a letter to the paper along the lines of how
>> wonderful it is that he has made his own hand . How wonderful the
>> technology
>> is, and that several of our members have these wonderful machines as do we
>> and we would be happy to see if we could help him or anyone else who wants
>> to learn about the technology.
>>
>> I'd be happy to draft something if it is th
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>
>
>
> --
> This e-mail and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they
> are addressed.
>
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy
> atynt yn unig.
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>



-- 
This e-mail and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy
atynt yn unig.


From timmoore47 at gmail.com  Mon May 18 09:32:57 2015
From: timmoore47 at gmail.com (Tim Moore)
Date: Mon, 18 May 2015 09:32:57 +0100
Subject: [Swansea Hackspace] MicroMite Mk 2 - joint purchase ?
Message-ID: <CAAEY5oMwq96Qv36Te5b8R+R400FzpZKsWxKCcPLNtx0Vugg53w@mail.gmail.com>

PIC32MX170F256B  is available from Farnell for a lot less if bought in
blocks of 10. less than ?5.00  each delivered  is my guess.

Now it uses BASIC as a language and has just gone up in a major spec
improvement.

This version comes in a 28 pin DIL version so is easy to solder in to a
stripboard priotoboard.

I'm happy to fund the initial purchase provided I can find 6 people who
would also like one.

http://geoffg.net/micromite.html

I got the Mk1 working fine a few months ago.

:  )))

Tim_1
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From alan at lxorguk.ukuu.org.uk  Mon May 18 12:05:23 2015
From: alan at lxorguk.ukuu.org.uk (Alan Cox)
Date: Mon, 18 May 2015 12:05:23 +0100
Subject: [Swansea Hackspace] MicroMite Mk 2 - joint purchase ?
In-Reply-To: <CAAEY5oMwq96Qv36Te5b8R+R400FzpZKsWxKCcPLNtx0Vugg53w@mail.gmail.com>
References: <CAAEY5oMwq96Qv36Te5b8R+R400FzpZKsWxKCcPLNtx0Vugg53w@mail.gmail.com>
Message-ID: <20150518120523.74c45339@www.etchedpixels.co.uk>

On Mon, 18 May 2015 09:32:57 +0100
Tim Moore <timmoore47 at gmail.com> wrote:

> PIC32MX170F256B  is available from Farnell for a lot less if bought in
> blocks of 10. less than ?5.00  each delivered  is my guess.
> 
> Now it uses BASIC as a language and has just gone up in a major spec
> improvement.

You can run much more useful stuff on it. See 

http://www.retrobsd.org

That also has a rather handy simulator for whatever work you want to do
with the chip.

Alan


From grahamowensuk at googlemail.com  Mon May 18 14:24:02 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Mon, 18 May 2015 14:24:02 +0100
Subject: [Swansea Hackspace] SQL Help
Message-ID: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>

Hi all,

Is anyone coming tonight that has good SQL skills?

Im having a problem with some joins and subquery type stuff.  Just to
clarify though, I can do what I am trying to achieve by using php as some
glue for the SQL, and now im up to a 25-35 seconds for the queries to
execute and my fake CRON doesnt like it - i get an email warning at 30, and
the process is killed at 35 seconds.

I believe it is achievable in MUCH less time doing all the work at the
database end - just now I have had to resort to creating a cache for the
results when it server load is low enough that it lets me process in under
30 seconds :(

if it helps the table format is something like this

table1
table1.id: autonum
active: bool
t2id_1: int
t2id_2: int
t2id_3: int
t2id_4: int
t2id_5: int
t2id_6: int

table2
table2.id: autonum
expected_date:  datetime
actual_date:   datetime
claim_date: datetime
value: datetime


what i need is
for every item in table1 that is active, get the items from table2 that
match t2id_1 ... t2id_6, from this i need a count and value  for the next
'x' months where the claim_date is blank

[month]['count'] = 3
[month]['value'] = 600

[month+n]['count'] = 7
[month+n]['value'] = 450

an so on..

I will have my laptop with me so i can demonstrate the actual database
format, and the results I desire if anyone can help :)

Thanks

G
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From grahamowensuk at googlemail.com  Mon May 18 14:32:35 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Mon, 18 May 2015 14:32:35 +0100
Subject: [Swansea Hackspace] Ideas for more maker kit
In-Reply-To: <555712A4.40800@sucs.org>
References: <307287D3-196A-42C3-8171-746DADBF093E@acm.org>
	<20150515204018.666565ab@picobox.apathetic.discordia.org.uk>
	<555712A4.40800@sucs.org>
Message-ID: <CAJqsN4Tv5-xhhaVkU_OpLbd+CGQqSYQABZ=mJLHwLOhb0fEVhg@mail.gmail.com>

Hi Sharon

Im gutted to hear that and wish that I could have made it along to a couple
of them, It has been absolutely hectic for me over the past few months -
the only time I have made it into swansea since the agm has been at random
o'clock and no-one has been around. In other news, have tried a few of the
box pleats, and think I have the hang of it now.  Will drop your book in
either with yourself or Justin depending on who is around - Thanks :)

On 16 May 2015 at 10:49, Tim <eclipse at sucs.org> wrote:

> The turnout to these was rather disappointing and I fully understand why
> the desision was made not to continue. However we do now have a page (
> http://swansea.hackspace.org.uk/Meetings/Suggestions) for people to
> suggest workshops they would like to attend and/or run so we can gauge
> interest in an attempt to prevent this kind of disappointment. If you would
> like some sewing (or anything else) workshops please request or like things
> there so we know people want and we can then make them happen.
> The laser cutter is only in that space temporally while we work on it to
> make it safe and ready for use, it will move to a more permanent home after
> that.
>
> Tim
>
>
> On 15/05/15 20:40, Sharon Mitchell wrote:
>
>> My 'Make it Sew' workshops (third Thursday of month) were so poorly
>> attended my sewing machine came home with me.  I believe there's a
>> laser cutter on that desk now..
>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From em at preseli.com  Mon May 18 14:44:50 2015
From: em at preseli.com (Emyr Morris)
Date: Mon, 18 May 2015 14:44:50 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
Message-ID: <CAGAFX7PtieLtsqXs7w3=9Qhj0y6VXVKAaDDRyNobvGVkGsZQPQ@mail.gmail.com>

I'll be there but I am guessing that you have probably tried all the
possibilities that I know - I'm at schoolboy level of SQL ;-)

On 18 May 2015 at 14:24, Graham Owens <grahamowensuk at googlemail.com> wrote:
> Hi all,
>
> Is anyone coming tonight that has good SQL skills?
>
> Im having a problem with some joins and subquery type stuff.  Just to
> clarify though, I can do what I am trying to achieve by using php as some
> glue for the SQL, and now im up to a 25-35 seconds for the queries to
> execute and my fake CRON doesnt like it - i get an email warning at 30, and
> the process is killed at 35 seconds.
>
> I believe it is achievable in MUCH less time doing all the work at the
> database end - just now I have had to resort to creating a cache for the
> results when it server load is low enough that it lets me process in under
> 30 seconds :(
>
> if it helps the table format is something like this
>
> table1
> table1.id: autonum
> active: bool
> t2id_1: int
> t2id_2: int
> t2id_3: int
> t2id_4: int
> t2id_5: int
> t2id_6: int
>
> table2
> table2.id: autonum
> expected_date:  datetime
> actual_date:   datetime
> claim_date: datetime
> value: datetime
>
>
> what i need is
> for every item in table1 that is active, get the items from table2 that
> match t2id_1 ... t2id_6, from this i need a count and value  for the next
> 'x' months where the claim_date is blank
>
> [month]['count'] = 3
> [month]['value'] = 600
>
> [month+n]['count'] = 7
> [month+n]['value'] = 450
>
> an so on..
>
> I will have my laptop with me so i can demonstrate the actual database
> format, and the results I desire if anyone can help :)
>
> Thanks
>
> G
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>



-- 
This e-mail and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy
atynt yn unig.


From grahamowensuk at googlemail.com  Mon May 18 14:45:32 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Mon, 18 May 2015 14:45:32 +0100
Subject: [Swansea Hackspace] Brass Fittings for melting things :)
Message-ID: <CAJqsN4Q8P96hey8kByoXVs3pHUnh=GNEyhYdJdyPEL1eoiYteg@mail.gmail.com>

Hi Everyone,

I am DESPERATE to find a brass fitting as follows.

1/2" (POSSIBLY 3/4") male threaded - not 100% sure what thread but it is
the one that fits into cookers etc (NOT the bayonet end, the end that
screws into the cooker, or bbq or whatever) and an 8mm hose barb on the
other end.

Or even a set of adaptors that will allow a connection from the threaded
end to the barb.

Something like this

http://guideimg.alibaba.com/images/shop/79/09/24/6/m-1-2-x-8mm-barbs-connector-male-hose-connector-plumbing-fittings-no-10022_1240316.jpg

if you have anything like it lying around, in a box in your shed,  could
you please bring it with you, and we can arrange a trade.

Last week i finally got round to getting:

Propane Bottle (FULL)
Adjustable Propane Regulator
Duel Burners
Sand
Bentonite Clay
Gas Hose
Hose Clamps

and already have the furnace, spare refractory, mould boxes, crucible,
safety gear and tongs.

So this really is the last thing I need, and the trade could be in the form
of an aluminium casting of your choosing - nothing too big or complex - as
it has been a loooong time since I have done any casting.

Also looking to experiment on 'Lost 3D Print - Casting' if anyone is
interested.

Thanks Again

G
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From em at preseli.com  Mon May 18 14:49:16 2015
From: em at preseli.com (Emyr Morris)
Date: Mon, 18 May 2015 14:49:16 +0100
Subject: [Swansea Hackspace] Brass Fittings for melting things :)
In-Reply-To: <CAJqsN4Q8P96hey8kByoXVs3pHUnh=GNEyhYdJdyPEL1eoiYteg@mail.gmail.com>
References: <CAJqsN4Q8P96hey8kByoXVs3pHUnh=GNEyhYdJdyPEL1eoiYteg@mail.gmail.com>
Message-ID: <CAGAFX7Motoh9C1RnmcW_MP37ZbsvQn=3Js1GNFb2Qa7u+PXVnA@mail.gmail.com>

is that for hooking up to a calor gas bottle?

On 18 May 2015 at 14:45, Graham Owens <grahamowensuk at googlemail.com> wrote:
> Hi Everyone,
>
> I am DESPERATE to find a brass fitting as follows.
>
> 1/2" (POSSIBLY 3/4") male threaded - not 100% sure what thread but it is the
> one that fits into cookers etc (NOT the bayonet end, the end that screws
> into the cooker, or bbq or whatever) and an 8mm hose barb on the other end.
>
> Or even a set of adaptors that will allow a connection from the threaded end
> to the barb.
>
> Something like this
>
> http://guideimg.alibaba.com/images/shop/79/09/24/6/m-1-2-x-8mm-barbs-connector-male-hose-connector-plumbing-fittings-no-10022_1240316.jpg
>
> if you have anything like it lying around, in a box in your shed,  could you
> please bring it with you, and we can arrange a trade.
>
> Last week i finally got round to getting:
>
> Propane Bottle (FULL)
> Adjustable Propane Regulator
> Duel Burners
> Sand
> Bentonite Clay
> Gas Hose
> Hose Clamps
>
> and already have the furnace, spare refractory, mould boxes, crucible,
> safety gear and tongs.
>
> So this really is the last thing I need, and the trade could be in the form
> of an aluminium casting of your choosing - nothing too big or complex - as
> it has been a loooong time since I have done any casting.
>
> Also looking to experiment on 'Lost 3D Print - Casting' if anyone is
> interested.
>
> Thanks Again
>
> G
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>



-- 
This e-mail and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy
atynt yn unig.


From justin at discordia.org.uk  Mon May 18 14:50:37 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Mon, 18 May 2015 14:50:37 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
Message-ID: <1431957037.24312.9.camel@justin.llw.rokcorp.com>

On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:


> table1
> table1.id: autonum
> active: bool
> t2id_1: int
> t2id_2: int
> t2id_3: int
> t2id_4: int
> t2id_5: int
> t2id_6: int


This is going to cause you problems, i forget which Normal Form it
breaks, but its going to make it much harder to perform the query you
want. Should probably be in a link table

Should be a few of us there tonight that can bend you ear about database
structures :)






From steve at chygwyn.com  Mon May 18 14:52:47 2015
From: steve at chygwyn.com (Steven Whitehouse)
Date: Mon, 18 May 2015 14:52:47 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
Message-ID: <1431957167.2691.6.camel@localhost>

Hi,

On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
> Hi all,
> 
> 
> Is anyone coming tonight that has good SQL skills?
> 
> 
> Im having a problem with some joins and subquery type stuff.  Just to
> clarify though, I can do what I am trying to achieve by using php as
> some glue for the SQL, and now im up to a 25-35 seconds for the
> queries to execute and my fake CRON doesnt like it - i get an email
> warning at 30, and the process is killed at 35 seconds.
> 
> 
> I believe it is achievable in MUCH less time doing all the work at the
> database end - just now I have had to resort to creating a cache for
> the results when it server load is low enough that it lets me process
> in under 30 seconds :(
> 
> 
> if it helps the table format is something like this
> 
> 
> table1
> table1.id: autonum
> active: bool
> t2id_1: int
> t2id_2: int
> 
> t2id_3: int
> 
> t2id_4: int
> 
> t2id_5: int
> 
> t2id_6: int
> 
> 
> 
> table2
> table2.id: autonum
> expected_date:  datetime
> actual_date:   datetime
> claim_date: datetime
> value: datetime
> 
> 
> 
> 
> what i need is
> for every item in table1 that is active, get the items from table2
> that match t2id_1 ... t2id_6, from this i need a count and value  for
> the next 'x' months where the claim_date is blank
> 
> 
I suspect that your data is structured wrongly... for table one you
might be able to rearrange like this:

table1
table1.id: autonum
active: bool
t2id: int
kind: int

So that now you only need to join the tables on one field. The new kind
column then tells you whether the entry is for t2id_1... t2id_6. That
would make it much simpler. I don't know what "active" is for, so maybe
you need to break that into two tables, if there should be only one
"active" per table 6 entries.

Anyway, once you've done your join, then you should be able to order by
months, and add a limit so that you only get the next N entries. You
could also use a where clause to limit the number returned too, as it
was not very clear as to which would be preferable in this case,

Steve.


> [month]['count'] = 3
> 
> [month]['value'] = 600
> 
> 
> [month+n]['count'] = 7
> 
> [month+n]['value'] = 450
> 
> 
> an so on..
> 
> 
> I will have my laptop with me so i can demonstrate the actual database
> format, and the results I desire if anyone can help :)
> 
> 
> Thanks
> 
> 
> G
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace




From justin at discordia.org.uk  Mon May 18 15:06:09 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Mon, 18 May 2015 15:06:09 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
Message-ID: <1431957969.24312.14.camel@justin.llw.rokcorp.com>

On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:


> table1
> table1.id: autonum
> active: bool
> t2id_1: int
> t2id_2: int
> t2id_3: int
> t2id_4: int
> t2id_5: int
> t2id_6: int
> 
> 
> 
> table2
> table2.id: autonum
> expected_date:  datetime
> actual_date:   datetime
> claim_date: datetime
> value: datetime

There are several questions about the data structure that need to be
asked here, will one table2 entry only be used once, or could it be
referenced by multiple table1 entries ?

if the former, then the t2id_* fields are unnessary
if the latter, then they should be replaced with a link table.

but the list might not be the place to thrash this out, will see you
later.





From justin at discordia.org.uk  Mon May 18 15:18:28 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Mon, 18 May 2015 15:18:28 +0100
Subject: [Swansea Hackspace] Brass Fittings for melting things :)
In-Reply-To: <CAJqsN4Q8P96hey8kByoXVs3pHUnh=GNEyhYdJdyPEL1eoiYteg@mail.gmail.com>
References: <CAJqsN4Q8P96hey8kByoXVs3pHUnh=GNEyhYdJdyPEL1eoiYteg@mail.gmail.com>
Message-ID: <1431958708.24312.18.camel@justin.llw.rokcorp.com>

On Mon, 2015-05-18 at 14:45 +0100, Graham Owens wrote:


> 1/2" (POSSIBLY 3/4") male threaded - not 100% sure what thread but it
> is the one that fits into cookers etc (NOT the bayonet end, the end
> that screws into the cooker, or bbq or whatever) and an 8mm hose barb
> on the other end.

3/8" BSP to 8mm hosetail ?

http://www.ebay.co.uk/itm//121340171848


I don't have one though sorry, just bought the inverse (female thread)
for use on the laser cutters flow sensor



From grahamowensuk at googlemail.com  Mon May 18 15:51:30 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Mon, 18 May 2015 15:51:30 +0100
Subject: [Swansea Hackspace] Brass Fittings for melting things :)
In-Reply-To: <1431958708.24312.18.camel@justin.llw.rokcorp.com>
References: <CAJqsN4Q8P96hey8kByoXVs3pHUnh=GNEyhYdJdyPEL1eoiYteg@mail.gmail.com>
	<1431958708.24312.18.camel@justin.llw.rokcorp.com>
Message-ID: <CAJqsN4TGhtcUfu-4OM7529SBvGcVKhspD1KJjn0DpO1w_P5mYQ@mail.gmail.com>

I don't know if its the same as the gas bottle end (i have the regulator
and hose attached at that end), but the furnace has the female on it, and
it runs the gas under the the furnace and splits it for the two seperate
burners.  (this is a commercial furnace - not one I knocked up myself - I
would have just duct taped the pipe to the burner ;) but I want to have
this set up properly as a tool that I can just switch on and use)

I will bring in the fitting I have that fits on one side, but has a 15mm
compression joint on the other and measure it - that's why I never ordered
one from fleabay - need to confirm exactly what I need.

On 18 May 2015 at 15:18, Justin Mitchell <justin at discordia.org.uk> wrote:

> On Mon, 2015-05-18 at 14:45 +0100, Graham Owens wrote:
>
>
> > 1/2" (POSSIBLY 3/4") male threaded - not 100% sure what thread but it
> > is the one that fits into cookers etc (NOT the bayonet end, the end
> > that screws into the cooker, or bbq or whatever) and an 8mm hose barb
> > on the other end.
>
> 3/8" BSP to 8mm hosetail ?
>
> http://www.ebay.co.uk/itm//121340171848
>
>
> I don't have one though sorry, just bought the inverse (female thread)
> for use on the laser cutters flow sensor
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From grahamowensuk at googlemail.com  Mon May 18 15:56:49 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Mon, 18 May 2015 15:56:49 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <1431957969.24312.14.camel@justin.llw.rokcorp.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
Message-ID: <CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>

Justin, I think you might be right - we can thrash it out a bit more later

Thanks for all the input, once we have a chat later - and formalize the
problem better (there are normalization rules????? - just kidding - i was
between a rock and a hard place, this works - just needs improved)

If it still is giving me problems, we can pick up the conversation then.

Thanks

G

On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk> wrote:

> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>
>
> > table1
> > table1.id: autonum
> > active: bool
> > t2id_1: int
> > t2id_2: int
> > t2id_3: int
> > t2id_4: int
> > t2id_5: int
> > t2id_6: int
> >
> >
> >
> > table2
> > table2.id: autonum
> > expected_date:  datetime
> > actual_date:   datetime
> > claim_date: datetime
> > value: datetime
>
> There are several questions about the data structure that need to be
> asked here, will one table2 entry only be used once, or could it be
> referenced by multiple table1 entries ?
>
> if the former, then the t2id_* fields are unnessary
> if the latter, then they should be replaced with a link table.
>
> but the list might not be the place to thrash this out, will see you
> later.
>
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From em at preseli.com  Mon May 18 16:00:31 2015
From: em at preseli.com (Emyr Morris)
Date: Mon, 18 May 2015 16:00:31 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
	<CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
Message-ID: <CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>

I can show you some real world examples later of working tables full of
data. I find it much easier to explain that way

On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com> wrote:

> Justin, I think you might be right - we can thrash it out a bit more later
>
> Thanks for all the input, once we have a chat later - and formalize the
> problem better (there are normalization rules????? - just kidding - i was
> between a rock and a hard place, this works - just needs improved)
>
> If it still is giving me problems, we can pick up the conversation then.
>
> Thanks
>
> G
>
> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk
> <javascript:_e(%7B%7D,'cvml','justin at discordia.org.uk');>> wrote:
>
>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>
>>
>> > table1
>> > table1.id: autonum
>> > active: bool
>> > t2id_1: int
>> > t2id_2: int
>> > t2id_3: int
>> > t2id_4: int
>> > t2id_5: int
>> > t2id_6: int
>> >
>> >
>> >
>> > table2
>> > table2.id: autonum
>> > expected_date:  datetime
>> > actual_date:   datetime
>> > claim_date: datetime
>> > value: datetime
>>
>> There are several questions about the data structure that need to be
>> asked here, will one table2 entry only be used once, or could it be
>> referenced by multiple table1 entries ?
>>
>> if the former, then the t2id_* fields are unnessary
>> if the latter, then they should be replaced with a link table.
>>
>> but the list might not be the place to thrash this out, will see you
>> later.
>>
>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> <javascript:_e(%7B%7D,'cvml','Hackspace at swansea.hackspace.org.uk');>
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>
>

-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
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From djdavies83 at hotmail.com  Tue May 19 07:23:20 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Tue, 19 May 2015 07:23:20 +0100
Subject: [Swansea Hackspace] Just found SCAD android
Message-ID: <DUB406-EAS83F005DB91CA466A8B8C29C6C30@phx.gbl>

It's called scorchcad, a few feature not present yet, but it's a start!?


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.
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From grahamowensuk at googlemail.com  Wed May 20 17:03:53 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Wed, 20 May 2015 17:03:53 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
	<CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
	<CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>
Message-ID: <CAJqsN4QRxqHLw4-4psBLCCeZY4MxqEkPucPrbGKep6y_YEXxVQ@mail.gmail.com>

Better??

 Column Type Null Default Comments   xxxx_id int(11) No       xxxx_modified
timestamp No  CURRENT_TIMESTAMP     xxxx_created timestamp No  0000-00-00
00:00:00     xxxx_title varchar(16) No       xxxx_first varchar(50) No
xxxx_last varchar(50) No       xxxx_dob date No       xxxx_active int(4) No
0     xxxx_start_date date No       xxxx_exp_end_date date No
xxxx_start_payment_value decimal(10,2) No
xxxx_start_payment_claim_date date Yes  *NULL*
xxxx_outcome_payment_value decimal(10,2) No
xxxx_outcome_payment_claim_date date Yes  *NULL*

 Column Type Null Default Comments   ms_id int(11) No       xxxx_id int(11)
No       ms_weight tinyint(4) No       ms_exp_date date No
ms_act_date date Yes  *NULL*     ms_claim_date date Yes  *NULL*
ms_value decimal(6,2) No


SELECT EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`) AS
period, COUNT(*) as ms_count, IFNULL(SUM(`milestone_value`),0) as ms_value,
  (
  SELECT COUNT(*)
  FROM `xxxx`
  WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
FROM `calendar_month`.`calendar_month_date`) AND
`xxxx_outcome_payment_claim_date` IS NULL
  ) as fin_count,
  IFNULL((
  SELECT SUM(`xxxx_outcome_payment_value`)
  FROM `xxxx`
  WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
FROM `calendar_month`.`calendar_month_date`) AND
`xxxx_outcome_payment_claim_date` IS NULL
  ),0) as fin_value
FROM `ms`
RIGHT JOIN `calendar_month`
ON EXTRACT(YEAR_MONTH FROM `ms`.`ms_exp_date`)=EXTRACT(YEAR_MONTH FROM
`calendar_month`.`calendar_month_date`)
WHERE `calendar_month`.`calendar_month_date` BETWEEN DATE_FORMAT(NOW()
,'%Y-%m-01') AND DATE_ADD(DATE_FORMAT(NOW() ,'%Y-%m-01'),INTERVAL 12 MONTH)
AND `ms`.`ms_claim_date` IS NULL
GROUP BY EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
LIMIT 12

Managed to get it down from *35.6576* seconds to *0.0139* seconds [?]

Thanks everyone.  Can this be made any more efficient, table row counts for
'ms' just now are 10's of thousands, but will be into the several hundred
thousand (possibly millions within a year)



On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:

> I can show you some real world examples later of working tables full of
> data. I find it much easier to explain that way
>
>
> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
> wrote:
>
>> Justin, I think you might be right - we can thrash it out a bit more later
>>
>> Thanks for all the input, once we have a chat later - and formalize the
>> problem better (there are normalization rules????? - just kidding - i was
>> between a rock and a hard place, this works - just needs improved)
>>
>> If it still is giving me problems, we can pick up the conversation then.
>>
>> Thanks
>>
>> G
>>
>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk> wrote:
>>
>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>
>>>
>>> > table1
>>> > table1.id: autonum
>>> > active: bool
>>> > t2id_1: int
>>> > t2id_2: int
>>> > t2id_3: int
>>> > t2id_4: int
>>> > t2id_5: int
>>> > t2id_6: int
>>> >
>>> >
>>> >
>>> > table2
>>> > table2.id: autonum
>>> > expected_date:  datetime
>>> > actual_date:   datetime
>>> > claim_date: datetime
>>> > value: datetime
>>>
>>> There are several questions about the data structure that need to be
>>> asked here, will one table2 entry only be used once, or could it be
>>> referenced by multiple table1 entries ?
>>>
>>> if the former, then the t2id_* fields are unnessary
>>> if the latter, then they should be replaced with a link table.
>>>
>>> but the list might not be the place to thrash this out, will see you
>>> later.
>>>
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>
>>
>
> --
> This e-mail and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed.
>
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
> ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:

> I can show you some real world examples later of working tables full of
> data. I find it much easier to explain that way
>
>
> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
> wrote:
>
>> Justin, I think you might be right - we can thrash it out a bit more later
>>
>> Thanks for all the input, once we have a chat later - and formalize the
>> problem better (there are normalization rules????? - just kidding - i was
>> between a rock and a hard place, this works - just needs improved)
>>
>> If it still is giving me problems, we can pick up the conversation then.
>>
>> Thanks
>>
>> G
>>
>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk> wrote:
>>
>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>
>>>
>>> > table1
>>> > table1.id: autonum
>>> > active: bool
>>> > t2id_1: int
>>> > t2id_2: int
>>> > t2id_3: int
>>> > t2id_4: int
>>> > t2id_5: int
>>> > t2id_6: int
>>> >
>>> >
>>> >
>>> > table2
>>> > table2.id: autonum
>>> > expected_date:  datetime
>>> > actual_date:   datetime
>>> > claim_date: datetime
>>> > value: datetime
>>>
>>> There are several questions about the data structure that need to be
>>> asked here, will one table2 entry only be used once, or could it be
>>> referenced by multiple table1 entries ?
>>>
>>> if the former, then the t2id_* fields are unnessary
>>> if the latter, then they should be replaced with a link table.
>>>
>>> but the list might not be the place to thrash this out, will see you
>>> later.
>>>
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>
>>
>
> --
> This e-mail and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed.
>
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
> ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From em at preseli.com  Wed May 20 20:28:08 2015
From: em at preseli.com (Emyr Morris)
Date: Wed, 20 May 2015 20:28:08 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4QRxqHLw4-4psBLCCeZY4MxqEkPucPrbGKep6y_YEXxVQ@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
	<CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
	<CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>
	<CAJqsN4QRxqHLw4-4psBLCCeZY4MxqEkPucPrbGKep6y_YEXxVQ@mail.gmail.com>
Message-ID: <CAGAFX7N=tRuGGTdjqCqdiVsp7o+_i40W1YCc3RSuROqDmiBT4A@mail.gmail.com>

it is amazing how a bit of tidying up makes such a difference! Chuffed for
you.

Smashes that old saying "A problem shared is a problem halved"!

Emyr



On 20 May 2015 at 17:03, Graham Owens <grahamowensuk at googlemail.com> wrote:

> Better??
>
>  Column Type Null Default Comments   xxxx_id int(11) No
> xxxx_modified timestamp No  CURRENT_TIMESTAMP     xxxx_created timestamp
> No  0000-00-00 00:00:00     xxxx_title varchar(16) No       xxxx_first
> varchar(50) No       xxxx_last varchar(50) No       xxxx_dob date No
> xxxx_active int(4) No  0     xxxx_start_date date No
> xxxx_exp_end_date date No       xxxx_start_payment_value decimal(10,2) No
>      xxxx_start_payment_claim_date date Yes  *NULL*
> xxxx_outcome_payment_value decimal(10,2) No
> xxxx_outcome_payment_claim_date date Yes  *NULL*
>
>  Column Type Null Default Comments   ms_id int(11) No       xxxx_id
> int(11) No       ms_weight tinyint(4) No       ms_exp_date date No
> ms_act_date date Yes  *NULL*     ms_claim_date date Yes  *NULL*
> ms_value decimal(6,2) No
>
>
> SELECT EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`) AS
> period, COUNT(*) as ms_count, IFNULL(SUM(`milestone_value`),0) as ms_value,
>   (
>   SELECT COUNT(*)
>   FROM `xxxx`
>   WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
> FROM `calendar_month`.`calendar_month_date`) AND
> `xxxx_outcome_payment_claim_date` IS NULL
>   ) as fin_count,
>   IFNULL((
>   SELECT SUM(`xxxx_outcome_payment_value`)
>   FROM `xxxx`
>   WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
> FROM `calendar_month`.`calendar_month_date`) AND
> `xxxx_outcome_payment_claim_date` IS NULL
>   ),0) as fin_value
> FROM `ms`
> RIGHT JOIN `calendar_month`
> ON EXTRACT(YEAR_MONTH FROM `ms`.`ms_exp_date`)=EXTRACT(YEAR_MONTH FROM
> `calendar_month`.`calendar_month_date`)
> WHERE `calendar_month`.`calendar_month_date` BETWEEN DATE_FORMAT(NOW()
> ,'%Y-%m-01') AND DATE_ADD(DATE_FORMAT(NOW() ,'%Y-%m-01'),INTERVAL 12 MONTH)
> AND `ms`.`ms_claim_date` IS NULL
> GROUP BY EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
> LIMIT 12
>
> Managed to get it down from *35.6576* seconds to *0.0139* seconds [?]
>
> Thanks everyone.  Can this be made any more efficient, table row counts
> for 'ms' just now are 10's of thousands, but will be into the several
> hundred thousand (possibly millions within a year)
>
>
>
> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>
>> I can show you some real world examples later of working tables full of
>> data. I find it much easier to explain that way
>>
>>
>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>> wrote:
>>
>>> Justin, I think you might be right - we can thrash it out a bit more
>>> later
>>>
>>> Thanks for all the input, once we have a chat later - and formalize the
>>> problem better (there are normalization rules????? - just kidding - i was
>>> between a rock and a hard place, this works - just needs improved)
>>>
>>> If it still is giving me problems, we can pick up the conversation then.
>>>
>>> Thanks
>>>
>>> G
>>>
>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>  wrote:
>>>
>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>
>>>>
>>>> > table1
>>>> > table1.id: autonum
>>>> > active: bool
>>>> > t2id_1: int
>>>> > t2id_2: int
>>>> > t2id_3: int
>>>> > t2id_4: int
>>>> > t2id_5: int
>>>> > t2id_6: int
>>>> >
>>>> >
>>>> >
>>>> > table2
>>>> > table2.id: autonum
>>>> > expected_date:  datetime
>>>> > actual_date:   datetime
>>>> > claim_date: datetime
>>>> > value: datetime
>>>>
>>>> There are several questions about the data structure that need to be
>>>> asked here, will one table2 entry only be used once, or could it be
>>>> referenced by multiple table1 entries ?
>>>>
>>>> if the former, then the t2id_* fields are unnessary
>>>> if the latter, then they should be replaced with a link table.
>>>>
>>>> but the list might not be the place to thrash this out, will see you
>>>> later.
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>
>>>
>>
>> --
>> This e-mail and any files transmitted with it are confidential and
>> intended solely for the use of the individual or entity to whom they are
>> addressed.
>>
>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>> yn unig.
>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>
>> I can show you some real world examples later of working tables full of
>> data. I find it much easier to explain that way
>>
>>
>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>> wrote:
>>
>>> Justin, I think you might be right - we can thrash it out a bit more
>>> later
>>>
>>> Thanks for all the input, once we have a chat later - and formalize the
>>> problem better (there are normalization rules????? - just kidding - i was
>>> between a rock and a hard place, this works - just needs improved)
>>>
>>> If it still is giving me problems, we can pick up the conversation then.
>>>
>>> Thanks
>>>
>>> G
>>>
>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>> wrote:
>>>
>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>
>>>>
>>>> > table1
>>>> > table1.id: autonum
>>>> > active: bool
>>>> > t2id_1: int
>>>> > t2id_2: int
>>>> > t2id_3: int
>>>> > t2id_4: int
>>>> > t2id_5: int
>>>> > t2id_6: int
>>>> >
>>>> >
>>>> >
>>>> > table2
>>>> > table2.id: autonum
>>>> > expected_date:  datetime
>>>> > actual_date:   datetime
>>>> > claim_date: datetime
>>>> > value: datetime
>>>>
>>>> There are several questions about the data structure that need to be
>>>> asked here, will one table2 entry only be used once, or could it be
>>>> referenced by multiple table1 entries ?
>>>>
>>>> if the former, then the t2id_* fields are unnessary
>>>> if the latter, then they should be replaced with a link table.
>>>>
>>>> but the list might not be the place to thrash this out, will see you
>>>> later.
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>
>>>
>>
>> --
>> This e-mail and any files transmitted with it are confidential and
>> intended solely for the use of the individual or entity to whom they are
>> addressed.
>>
>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>> yn unig.
>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>


-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
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From grahamowensuk at googlemail.com  Wed May 20 20:35:10 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Wed, 20 May 2015 20:35:10 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAGAFX7N=tRuGGTdjqCqdiVsp7o+_i40W1YCc3RSuROqDmiBT4A@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
	<CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
	<CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>
	<CAJqsN4QRxqHLw4-4psBLCCeZY4MxqEkPucPrbGKep6y_YEXxVQ@mail.gmail.com>
	<CAGAFX7N=tRuGGTdjqCqdiVsp7o+_i40W1YCc3RSuROqDmiBT4A@mail.gmail.com>
Message-ID: <CAJqsN4T3+5S9CDYbVskx4BBMH+4d4Nia62N1xsrHS6V2MS54AA@mail.gmail.com>

Yeah deffo,

Im so glad we had that chat on Monday, there were some bits that I knew,
but some awesome additional info - you will also be please to not that I
have been through and fixed ALL the date usages in my code so that
everything is handled on the database end. :)

If you want a challenge, this is my next problem
http://stackoverflow.com/questions/30358486/mysql-query-using-id-in-subquery-or-join

Same as before, I have something that works, using PHP in the middle to
pass in variables to the sub-queries but its very inefficient and makes the
PHP almost unreadable.

Thanks,

G



On 20 May 2015 at 20:28, Emyr Morris <em at preseli.com> wrote:

> it is amazing how a bit of tidying up makes such a difference! Chuffed for
> you.
>
> Smashes that old saying "A problem shared is a problem halved"!
>
> Emyr
>
>
>
> On 20 May 2015 at 17:03, Graham Owens <grahamowensuk at googlemail.com>
> wrote:
>
>> Better??
>>
>>  Column Type Null Default Comments   xxxx_id int(11) No
>> xxxx_modified timestamp No  CURRENT_TIMESTAMP     xxxx_created timestamp
>> No  0000-00-00 00:00:00     xxxx_title varchar(16) No       xxxx_first
>> varchar(50) No       xxxx_last varchar(50) No       xxxx_dob date No
>> xxxx_active int(4) No  0     xxxx_start_date date No
>> xxxx_exp_end_date date No       xxxx_start_payment_value decimal(10,2)
>> No       xxxx_start_payment_claim_date date Yes  *NULL*
>> xxxx_outcome_payment_value decimal(10,2) No
>> xxxx_outcome_payment_claim_date date Yes  *NULL*
>>
>>  Column Type Null Default Comments   ms_id int(11) No       xxxx_id
>> int(11) No       ms_weight tinyint(4) No       ms_exp_date date No
>> ms_act_date date Yes  *NULL*     ms_claim_date date Yes  *NULL*
>> ms_value decimal(6,2) No
>>
>>
>> SELECT EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`) AS
>> period, COUNT(*) as ms_count, IFNULL(SUM(`milestone_value`),0) as ms_value,
>>   (
>>   SELECT COUNT(*)
>>   FROM `xxxx`
>>   WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
>> FROM `calendar_month`.`calendar_month_date`) AND
>> `xxxx_outcome_payment_claim_date` IS NULL
>>   ) as fin_count,
>>   IFNULL((
>>   SELECT SUM(`xxxx_outcome_payment_value`)
>>   FROM `xxxx`
>>   WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
>> FROM `calendar_month`.`calendar_month_date`) AND
>> `xxxx_outcome_payment_claim_date` IS NULL
>>   ),0) as fin_value
>> FROM `ms`
>> RIGHT JOIN `calendar_month`
>> ON EXTRACT(YEAR_MONTH FROM `ms`.`ms_exp_date`)=EXTRACT(YEAR_MONTH FROM
>> `calendar_month`.`calendar_month_date`)
>> WHERE `calendar_month`.`calendar_month_date` BETWEEN DATE_FORMAT(NOW()
>> ,'%Y-%m-01') AND DATE_ADD(DATE_FORMAT(NOW() ,'%Y-%m-01'),INTERVAL 12 MONTH)
>> AND `ms`.`ms_claim_date` IS NULL
>> GROUP BY EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
>> LIMIT 12
>>
>> Managed to get it down from *35.6576* seconds to *0.0139* seconds [?]
>>
>> Thanks everyone.  Can this be made any more efficient, table row counts
>> for 'ms' just now are 10's of thousands, but will be into the several
>> hundred thousand (possibly millions within a year)
>>
>>
>>
>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>
>>> I can show you some real world examples later of working tables full of
>>> data. I find it much easier to explain that way
>>>
>>>
>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>> wrote:
>>>
>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>> later
>>>>
>>>> Thanks for all the input, once we have a chat later - and formalize the
>>>> problem better (there are normalization rules????? - just kidding - i was
>>>> between a rock and a hard place, this works - just needs improved)
>>>>
>>>> If it still is giving me problems, we can pick up the conversation then.
>>>>
>>>> Thanks
>>>>
>>>> G
>>>>
>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>  wrote:
>>>>
>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>
>>>>>
>>>>> > table1
>>>>> > table1.id: autonum
>>>>> > active: bool
>>>>> > t2id_1: int
>>>>> > t2id_2: int
>>>>> > t2id_3: int
>>>>> > t2id_4: int
>>>>> > t2id_5: int
>>>>> > t2id_6: int
>>>>> >
>>>>> >
>>>>> >
>>>>> > table2
>>>>> > table2.id: autonum
>>>>> > expected_date:  datetime
>>>>> > actual_date:   datetime
>>>>> > claim_date: datetime
>>>>> > value: datetime
>>>>>
>>>>> There are several questions about the data structure that need to be
>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>> referenced by multiple table1 entries ?
>>>>>
>>>>> if the former, then the t2id_* fields are unnessary
>>>>> if the latter, then they should be replaced with a link table.
>>>>>
>>>>> but the list might not be the place to thrash this out, will see you
>>>>> later.
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>
>>>>
>>>
>>> --
>>> This e-mail and any files transmitted with it are confidential and
>>> intended solely for the use of the individual or entity to whom they are
>>> addressed.
>>>
>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>> yn unig.
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>
>>> I can show you some real world examples later of working tables full of
>>> data. I find it much easier to explain that way
>>>
>>>
>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>> wrote:
>>>
>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>> later
>>>>
>>>> Thanks for all the input, once we have a chat later - and formalize the
>>>> problem better (there are normalization rules????? - just kidding - i was
>>>> between a rock and a hard place, this works - just needs improved)
>>>>
>>>> If it still is giving me problems, we can pick up the conversation then.
>>>>
>>>> Thanks
>>>>
>>>> G
>>>>
>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>> wrote:
>>>>
>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>
>>>>>
>>>>> > table1
>>>>> > table1.id: autonum
>>>>> > active: bool
>>>>> > t2id_1: int
>>>>> > t2id_2: int
>>>>> > t2id_3: int
>>>>> > t2id_4: int
>>>>> > t2id_5: int
>>>>> > t2id_6: int
>>>>> >
>>>>> >
>>>>> >
>>>>> > table2
>>>>> > table2.id: autonum
>>>>> > expected_date:  datetime
>>>>> > actual_date:   datetime
>>>>> > claim_date: datetime
>>>>> > value: datetime
>>>>>
>>>>> There are several questions about the data structure that need to be
>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>> referenced by multiple table1 entries ?
>>>>>
>>>>> if the former, then the t2id_* fields are unnessary
>>>>> if the latter, then they should be replaced with a link table.
>>>>>
>>>>> but the list might not be the place to thrash this out, will see you
>>>>> later.
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>
>>>>
>>>
>>> --
>>> This e-mail and any files transmitted with it are confidential and
>>> intended solely for the use of the individual or entity to whom they are
>>> addressed.
>>>
>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>> yn unig.
>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>
>
> --
> This e-mail and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed.
>
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
> ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From em at preseli.com  Wed May 20 21:19:01 2015
From: em at preseli.com (Emyr Morris)
Date: Wed, 20 May 2015 21:19:01 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAJqsN4T3+5S9CDYbVskx4BBMH+4d4Nia62N1xsrHS6V2MS54AA@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
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Message-ID: <CAGAFX7MkvhMDDK3iJn2wZObzp7sPNDfwib3pkGVSuLH_xnmt9A@mail.gmail.com>

is this the perfect time to run a CRON job to calculate who is due a
review... producing a new table... and then query the results of the cron
job?

I'm thinking run the Cron every 24 hours and then any day that a manager
wants a report it can be fetched easily

That would simplify the SQL a lot

On 20 May 2015 at 20:35, Graham Owens <grahamowensuk at googlemail.com> wrote:

> Yeah deffo,
>
> Im so glad we had that chat on Monday, there were some bits that I knew,
> but some awesome additional info - you will also be please to not that I
> have been through and fixed ALL the date usages in my code so that
> everything is handled on the database end. :)
>
> If you want a challenge, this is my next problem
> http://stackoverflow.com/questions/30358486/mysql-query-using-id-in-subquery-or-join
>
> Same as before, I have something that works, using PHP in the middle to
> pass in variables to the sub-queries but its very inefficient and makes the
> PHP almost unreadable.
>
> Thanks,
>
> G
>
>
>
> On 20 May 2015 at 20:28, Emyr Morris <em at preseli.com> wrote:
>
>> it is amazing how a bit of tidying up makes such a difference! Chuffed
>> for you.
>>
>> Smashes that old saying "A problem shared is a problem halved"!
>>
>> Emyr
>>
>>
>>
>> On 20 May 2015 at 17:03, Graham Owens <grahamowensuk at googlemail.com>
>> wrote:
>>
>>> Better??
>>>
>>>  Column Type Null Default Comments   xxxx_id int(11) No
>>> xxxx_modified timestamp No  CURRENT_TIMESTAMP     xxxx_created timestamp
>>> No  0000-00-00 00:00:00     xxxx_title varchar(16) No       xxxx_first
>>> varchar(50) No       xxxx_last varchar(50) No       xxxx_dob date No
>>>    xxxx_active int(4) No  0     xxxx_start_date date No
>>> xxxx_exp_end_date date No       xxxx_start_payment_value decimal(10,2)
>>> No       xxxx_start_payment_claim_date date Yes  *NULL*
>>> xxxx_outcome_payment_value decimal(10,2) No
>>> xxxx_outcome_payment_claim_date date Yes  *NULL*
>>>
>>>  Column Type Null Default Comments   ms_id int(11) No       xxxx_id
>>> int(11) No       ms_weight tinyint(4) No       ms_exp_date date No
>>> ms_act_date date Yes  *NULL*     ms_claim_date date Yes  *NULL*
>>> ms_value decimal(6,2) No
>>>
>>>
>>> SELECT EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
>>> AS period, COUNT(*) as ms_count, IFNULL(SUM(`milestone_value`),0) as
>>> ms_value,
>>>   (
>>>   SELECT COUNT(*)
>>>   FROM `xxxx`
>>>   WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
>>> FROM `calendar_month`.`calendar_month_date`) AND
>>> `xxxx_outcome_payment_claim_date` IS NULL
>>>   ) as fin_count,
>>>   IFNULL((
>>>   SELECT SUM(`xxxx_outcome_payment_value`)
>>>   FROM `xxxx`
>>>   WHERE EXTRACT(YEAR_MONTH FROM `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH
>>> FROM `calendar_month`.`calendar_month_date`) AND
>>> `xxxx_outcome_payment_claim_date` IS NULL
>>>   ),0) as fin_value
>>> FROM `ms`
>>> RIGHT JOIN `calendar_month`
>>> ON EXTRACT(YEAR_MONTH FROM `ms`.`ms_exp_date`)=EXTRACT(YEAR_MONTH FROM
>>> `calendar_month`.`calendar_month_date`)
>>> WHERE `calendar_month`.`calendar_month_date` BETWEEN DATE_FORMAT(NOW()
>>> ,'%Y-%m-01') AND DATE_ADD(DATE_FORMAT(NOW() ,'%Y-%m-01'),INTERVAL 12 MONTH)
>>> AND `ms`.`ms_claim_date` IS NULL
>>> GROUP BY EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
>>> LIMIT 12
>>>
>>> Managed to get it down from *35.6576* seconds to *0.0139* seconds [?]
>>>
>>> Thanks everyone.  Can this be made any more efficient, table row counts
>>> for 'ms' just now are 10's of thousands, but will be into the several
>>> hundred thousand (possibly millions within a year)
>>>
>>>
>>>
>>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>>
>>>> I can show you some real world examples later of working tables full of
>>>> data. I find it much easier to explain that way
>>>>
>>>>
>>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>>> wrote:
>>>>
>>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>>> later
>>>>>
>>>>> Thanks for all the input, once we have a chat later - and formalize
>>>>> the problem better (there are normalization rules????? - just kidding - i
>>>>> was between a rock and a hard place, this works - just needs improved)
>>>>>
>>>>> If it still is giving me problems, we can pick up the conversation
>>>>> then.
>>>>>
>>>>> Thanks
>>>>>
>>>>> G
>>>>>
>>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>>  wrote:
>>>>>
>>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>>
>>>>>>
>>>>>> > table1
>>>>>> > table1.id: autonum
>>>>>> > active: bool
>>>>>> > t2id_1: int
>>>>>> > t2id_2: int
>>>>>> > t2id_3: int
>>>>>> > t2id_4: int
>>>>>> > t2id_5: int
>>>>>> > t2id_6: int
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > table2
>>>>>> > table2.id: autonum
>>>>>> > expected_date:  datetime
>>>>>> > actual_date:   datetime
>>>>>> > claim_date: datetime
>>>>>> > value: datetime
>>>>>>
>>>>>> There are several questions about the data structure that need to be
>>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>>> referenced by multiple table1 entries ?
>>>>>>
>>>>>> if the former, then the t2id_* fields are unnessary
>>>>>> if the latter, then they should be replaced with a link table.
>>>>>>
>>>>>> but the list might not be the place to thrash this out, will see you
>>>>>> later.
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Hackspace mailing list
>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> This e-mail and any files transmitted with it are confidential and
>>>> intended solely for the use of the individual or entity to whom they are
>>>> addressed.
>>>>
>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>> yn unig.
>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>>
>>>> I can show you some real world examples later of working tables full of
>>>> data. I find it much easier to explain that way
>>>>
>>>>
>>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>>> wrote:
>>>>
>>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>>> later
>>>>>
>>>>> Thanks for all the input, once we have a chat later - and formalize
>>>>> the problem better (there are normalization rules????? - just kidding - i
>>>>> was between a rock and a hard place, this works - just needs improved)
>>>>>
>>>>> If it still is giving me problems, we can pick up the conversation
>>>>> then.
>>>>>
>>>>> Thanks
>>>>>
>>>>> G
>>>>>
>>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>> wrote:
>>>>>
>>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>>
>>>>>>
>>>>>> > table1
>>>>>> > table1.id: autonum
>>>>>> > active: bool
>>>>>> > t2id_1: int
>>>>>> > t2id_2: int
>>>>>> > t2id_3: int
>>>>>> > t2id_4: int
>>>>>> > t2id_5: int
>>>>>> > t2id_6: int
>>>>>> >
>>>>>> >
>>>>>> >
>>>>>> > table2
>>>>>> > table2.id: autonum
>>>>>> > expected_date:  datetime
>>>>>> > actual_date:   datetime
>>>>>> > claim_date: datetime
>>>>>> > value: datetime
>>>>>>
>>>>>> There are several questions about the data structure that need to be
>>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>>> referenced by multiple table1 entries ?
>>>>>>
>>>>>> if the former, then the t2id_* fields are unnessary
>>>>>> if the latter, then they should be replaced with a link table.
>>>>>>
>>>>>> but the list might not be the place to thrash this out, will see you
>>>>>> later.
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Hackspace mailing list
>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>
>>>>>
>>>>
>>>> --
>>>> This e-mail and any files transmitted with it are confidential and
>>>> intended solely for the use of the individual or entity to whom they are
>>>> addressed.
>>>>
>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>> yn unig.
>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>>
>> --
>> This e-mail and any files transmitted with it are confidential and
>> intended solely for the use of the individual or entity to whom they are
>> addressed.
>>
>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>> yn unig.
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>


-- 
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From em at preseli.com  Wed May 20 21:20:45 2015
From: em at preseli.com (Emyr Morris)
Date: Wed, 20 May 2015 21:20:45 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAGAFX7MkvhMDDK3iJn2wZObzp7sPNDfwib3pkGVSuLH_xnmt9A@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
	<CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
	<CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>
	<CAJqsN4QRxqHLw4-4psBLCCeZY4MxqEkPucPrbGKep6y_YEXxVQ@mail.gmail.com>
	<CAGAFX7N=tRuGGTdjqCqdiVsp7o+_i40W1YCc3RSuROqDmiBT4A@mail.gmail.com>
	<CAJqsN4T3+5S9CDYbVskx4BBMH+4d4Nia62N1xsrHS6V2MS54AA@mail.gmail.com>
	<CAGAFX7MkvhMDDK3iJn2wZObzp7sPNDfwib3pkGVSuLH_xnmt9A@mail.gmail.com>
Message-ID: <CAGAFX7M3wsQxz+ZqH7axTM+a5myRjyLiQmXQLB-n00uopSK_Xg@mail.gmail.com>

Again... is the 'review' data stored in the 'candidate' table or in a sub
table?

If you record the reviews in a sub table 'review-logs' then it would be
easier to fetch results or the lack of results

On 20 May 2015 at 21:19, Emyr Morris <em at preseli.com> wrote:

> is this the perfect time to run a CRON job to calculate who is due a
> review... producing a new table... and then query the results of the cron
> job?
>
> I'm thinking run the Cron every 24 hours and then any day that a manager
> wants a report it can be fetched easily
>
> That would simplify the SQL a lot
>
> On 20 May 2015 at 20:35, Graham Owens <grahamowensuk at googlemail.com>
> wrote:
>
>> Yeah deffo,
>>
>> Im so glad we had that chat on Monday, there were some bits that I knew,
>> but some awesome additional info - you will also be please to not that I
>> have been through and fixed ALL the date usages in my code so that
>> everything is handled on the database end. :)
>>
>> If you want a challenge, this is my next problem
>> http://stackoverflow.com/questions/30358486/mysql-query-using-id-in-subquery-or-join
>>
>> Same as before, I have something that works, using PHP in the middle to
>> pass in variables to the sub-queries but its very inefficient and makes the
>> PHP almost unreadable.
>>
>> Thanks,
>>
>> G
>>
>>
>>
>> On 20 May 2015 at 20:28, Emyr Morris <em at preseli.com> wrote:
>>
>>> it is amazing how a bit of tidying up makes such a difference! Chuffed
>>> for you.
>>>
>>> Smashes that old saying "A problem shared is a problem halved"!
>>>
>>> Emyr
>>>
>>>
>>>
>>> On 20 May 2015 at 17:03, Graham Owens <grahamowensuk at googlemail.com>
>>> wrote:
>>>
>>>> Better??
>>>>
>>>>  Column Type Null Default Comments   xxxx_id int(11) No
>>>> xxxx_modified timestamp No  CURRENT_TIMESTAMP     xxxx_created
>>>> timestamp No  0000-00-00 00:00:00     xxxx_title varchar(16) No
>>>> xxxx_first varchar(50) No       xxxx_last varchar(50) No
>>>> xxxx_dob date No       xxxx_active int(4) No  0     xxxx_start_date
>>>> date No       xxxx_exp_end_date date No       xxxx_start_payment_value
>>>> decimal(10,2) No       xxxx_start_payment_claim_date date Yes  *NULL*
>>>>    xxxx_outcome_payment_value decimal(10,2) No
>>>> xxxx_outcome_payment_claim_date date Yes  *NULL*
>>>>
>>>>  Column Type Null Default Comments   ms_id int(11) No       xxxx_id
>>>> int(11) No       ms_weight tinyint(4) No       ms_exp_date date No
>>>> ms_act_date date Yes  *NULL*     ms_claim_date date Yes  *NULL*
>>>> ms_value decimal(6,2) No
>>>>
>>>>
>>>> SELECT EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
>>>> AS period, COUNT(*) as ms_count, IFNULL(SUM(`milestone_value`),0) as
>>>> ms_value,
>>>>   (
>>>>   SELECT COUNT(*)
>>>>   FROM `xxxx`
>>>>   WHERE EXTRACT(YEAR_MONTH FROM
>>>> `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH FROM
>>>> `calendar_month`.`calendar_month_date`) AND
>>>> `xxxx_outcome_payment_claim_date` IS NULL
>>>>   ) as fin_count,
>>>>   IFNULL((
>>>>   SELECT SUM(`xxxx_outcome_payment_value`)
>>>>   FROM `xxxx`
>>>>   WHERE EXTRACT(YEAR_MONTH FROM
>>>> `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH FROM
>>>> `calendar_month`.`calendar_month_date`) AND
>>>> `xxxx_outcome_payment_claim_date` IS NULL
>>>>   ),0) as fin_value
>>>> FROM `ms`
>>>> RIGHT JOIN `calendar_month`
>>>> ON EXTRACT(YEAR_MONTH FROM `ms`.`ms_exp_date`)=EXTRACT(YEAR_MONTH FROM
>>>> `calendar_month`.`calendar_month_date`)
>>>> WHERE `calendar_month`.`calendar_month_date` BETWEEN DATE_FORMAT(NOW()
>>>> ,'%Y-%m-01') AND DATE_ADD(DATE_FORMAT(NOW() ,'%Y-%m-01'),INTERVAL 12 MONTH)
>>>> AND `ms`.`ms_claim_date` IS NULL
>>>> GROUP BY EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
>>>> LIMIT 12
>>>>
>>>> Managed to get it down from *35.6576* seconds to *0.0139* seconds [?]
>>>>
>>>> Thanks everyone.  Can this be made any more efficient, table row counts
>>>> for 'ms' just now are 10's of thousands, but will be into the several
>>>> hundred thousand (possibly millions within a year)
>>>>
>>>>
>>>>
>>>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>>>
>>>>> I can show you some real world examples later of working tables full
>>>>> of data. I find it much easier to explain that way
>>>>>
>>>>>
>>>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>>>> wrote:
>>>>>
>>>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>>>> later
>>>>>>
>>>>>> Thanks for all the input, once we have a chat later - and formalize
>>>>>> the problem better (there are normalization rules????? - just kidding - i
>>>>>> was between a rock and a hard place, this works - just needs improved)
>>>>>>
>>>>>> If it still is giving me problems, we can pick up the conversation
>>>>>> then.
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> G
>>>>>>
>>>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>>>  wrote:
>>>>>>
>>>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>>>
>>>>>>>
>>>>>>> > table1
>>>>>>> > table1.id: autonum
>>>>>>> > active: bool
>>>>>>> > t2id_1: int
>>>>>>> > t2id_2: int
>>>>>>> > t2id_3: int
>>>>>>> > t2id_4: int
>>>>>>> > t2id_5: int
>>>>>>> > t2id_6: int
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> > table2
>>>>>>> > table2.id: autonum
>>>>>>> > expected_date:  datetime
>>>>>>> > actual_date:   datetime
>>>>>>> > claim_date: datetime
>>>>>>> > value: datetime
>>>>>>>
>>>>>>> There are several questions about the data structure that need to be
>>>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>>>> referenced by multiple table1 entries ?
>>>>>>>
>>>>>>> if the former, then the t2id_* fields are unnessary
>>>>>>> if the latter, then they should be replaced with a link table.
>>>>>>>
>>>>>>> but the list might not be the place to thrash this out, will see you
>>>>>>> later.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Hackspace mailing list
>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> This e-mail and any files transmitted with it are confidential and
>>>>> intended solely for the use of the individual or entity to whom they are
>>>>> addressed.
>>>>>
>>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>>> yn unig.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>>
>>>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>>>
>>>>> I can show you some real world examples later of working tables full
>>>>> of data. I find it much easier to explain that way
>>>>>
>>>>>
>>>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>>>> wrote:
>>>>>
>>>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>>>> later
>>>>>>
>>>>>> Thanks for all the input, once we have a chat later - and formalize
>>>>>> the problem better (there are normalization rules????? - just kidding - i
>>>>>> was between a rock and a hard place, this works - just needs improved)
>>>>>>
>>>>>> If it still is giving me problems, we can pick up the conversation
>>>>>> then.
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> G
>>>>>>
>>>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>>> wrote:
>>>>>>
>>>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>>>
>>>>>>>
>>>>>>> > table1
>>>>>>> > table1.id: autonum
>>>>>>> > active: bool
>>>>>>> > t2id_1: int
>>>>>>> > t2id_2: int
>>>>>>> > t2id_3: int
>>>>>>> > t2id_4: int
>>>>>>> > t2id_5: int
>>>>>>> > t2id_6: int
>>>>>>> >
>>>>>>> >
>>>>>>> >
>>>>>>> > table2
>>>>>>> > table2.id: autonum
>>>>>>> > expected_date:  datetime
>>>>>>> > actual_date:   datetime
>>>>>>> > claim_date: datetime
>>>>>>> > value: datetime
>>>>>>>
>>>>>>> There are several questions about the data structure that need to be
>>>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>>>> referenced by multiple table1 entries ?
>>>>>>>
>>>>>>> if the former, then the t2id_* fields are unnessary
>>>>>>> if the latter, then they should be replaced with a link table.
>>>>>>>
>>>>>>> but the list might not be the place to thrash this out, will see you
>>>>>>> later.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Hackspace mailing list
>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> This e-mail and any files transmitted with it are confidential and
>>>>> intended solely for the use of the individual or entity to whom they are
>>>>> addressed.
>>>>>
>>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>>> yn unig.
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>>
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>>
>>>
>>> --
>>> This e-mail and any files transmitted with it are confidential and
>>> intended solely for the use of the individual or entity to whom they are
>>> addressed.
>>>
>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>> yn unig.
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>
>
> --
> This e-mail and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed.
>
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
> ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
>



-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
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From grahamowensuk at googlemail.com  Wed May 20 21:58:06 2015
From: grahamowensuk at googlemail.com (Graham Owens)
Date: Wed, 20 May 2015 21:58:06 +0100
Subject: [Swansea Hackspace] SQL Help
In-Reply-To: <CAGAFX7M3wsQxz+ZqH7axTM+a5myRjyLiQmXQLB-n00uopSK_Xg@mail.gmail.com>
References: <CAJqsN4T8c_bWSJ8SeOV67d0QwzY2ayrPk_JYVaZ4hh_ZkX+PKg@mail.gmail.com>
	<1431957969.24312.14.camel@justin.llw.rokcorp.com>
	<CAJqsN4RHsyTE9JafNUw=56wg_Xx0MBv6-eAPj_t5fbBEC7d=pw@mail.gmail.com>
	<CAGAFX7PSfk6jrA94cC4e4FuH9xmqpujoLoVBdMUK4Y0KEGmg=A@mail.gmail.com>
	<CAJqsN4QRxqHLw4-4psBLCCeZY4MxqEkPucPrbGKep6y_YEXxVQ@mail.gmail.com>
	<CAGAFX7N=tRuGGTdjqCqdiVsp7o+_i40W1YCc3RSuROqDmiBT4A@mail.gmail.com>
	<CAJqsN4T3+5S9CDYbVskx4BBMH+4d4Nia62N1xsrHS6V2MS54AA@mail.gmail.com>
	<CAGAFX7MkvhMDDK3iJn2wZObzp7sPNDfwib3pkGVSuLH_xnmt9A@mail.gmail.com>
	<CAGAFX7M3wsQxz+ZqH7axTM+a5myRjyLiQmXQLB-n00uopSK_Xg@mail.gmail.com>
Message-ID: <CAJqsN4SENti+iUuoYLZtm5hw-a0u5UF9oqjJs+2ccxJyABEmZQ@mail.gmail.com>

I added a sql fiddle to the post including tables and sample data :)
On 20 May 2015 21:21, "Emyr Morris" <em at preseli.com> wrote:

> Again... is the 'review' data stored in the 'candidate' table or in a sub
> table?
>
> If you record the reviews in a sub table 'review-logs' then it would be
> easier to fetch results or the lack of results
>
> On 20 May 2015 at 21:19, Emyr Morris <em at preseli.com> wrote:
>
>> is this the perfect time to run a CRON job to calculate who is due a
>> review... producing a new table... and then query the results of the cron
>> job?
>>
>> I'm thinking run the Cron every 24 hours and then any day that a manager
>> wants a report it can be fetched easily
>>
>> That would simplify the SQL a lot
>>
>> On 20 May 2015 at 20:35, Graham Owens <grahamowensuk at googlemail.com>
>> wrote:
>>
>>> Yeah deffo,
>>>
>>> Im so glad we had that chat on Monday, there were some bits that I knew,
>>> but some awesome additional info - you will also be please to not that I
>>> have been through and fixed ALL the date usages in my code so that
>>> everything is handled on the database end. :)
>>>
>>> If you want a challenge, this is my next problem
>>> http://stackoverflow.com/questions/30358486/mysql-query-using-id-in-subquery-or-join
>>>
>>> Same as before, I have something that works, using PHP in the middle to
>>> pass in variables to the sub-queries but its very inefficient and makes the
>>> PHP almost unreadable.
>>>
>>> Thanks,
>>>
>>> G
>>>
>>>
>>>
>>> On 20 May 2015 at 20:28, Emyr Morris <em at preseli.com> wrote:
>>>
>>>> it is amazing how a bit of tidying up makes such a difference! Chuffed
>>>> for you.
>>>>
>>>> Smashes that old saying "A problem shared is a problem halved"!
>>>>
>>>> Emyr
>>>>
>>>>
>>>>
>>>> On 20 May 2015 at 17:03, Graham Owens <grahamowensuk at googlemail.com>
>>>> wrote:
>>>>
>>>>> Better??
>>>>>
>>>>>  Column Type Null Default Comments   xxxx_id int(11) No
>>>>> xxxx_modified timestamp No  CURRENT_TIMESTAMP     xxxx_created
>>>>> timestamp No  0000-00-00 00:00:00     xxxx_title varchar(16) No
>>>>> xxxx_first varchar(50) No       xxxx_last varchar(50) No
>>>>> xxxx_dob date No       xxxx_active int(4) No  0     xxxx_start_date
>>>>> date No       xxxx_exp_end_date date No
>>>>> xxxx_start_payment_value decimal(10,2) No
>>>>> xxxx_start_payment_claim_date date Yes  *NULL*
>>>>> xxxx_outcome_payment_value decimal(10,2) No
>>>>> xxxx_outcome_payment_claim_date date Yes  *NULL*
>>>>>
>>>>>  Column Type Null Default Comments   ms_id int(11) No       xxxx_id
>>>>> int(11) No       ms_weight tinyint(4) No       ms_exp_date date No
>>>>>    ms_act_date date Yes  *NULL*     ms_claim_date date Yes  *NULL*
>>>>> ms_value decimal(6,2) No
>>>>>
>>>>>
>>>>> SELECT EXTRACT(YEAR_MONTH FROM `calendar_month`.`calendar_month_date`)
>>>>> AS period, COUNT(*) as ms_count, IFNULL(SUM(`milestone_value`),0) as
>>>>> ms_value,
>>>>>   (
>>>>>   SELECT COUNT(*)
>>>>>   FROM `xxxx`
>>>>>   WHERE EXTRACT(YEAR_MONTH FROM
>>>>> `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH FROM
>>>>> `calendar_month`.`calendar_month_date`) AND
>>>>> `xxxx_outcome_payment_claim_date` IS NULL
>>>>>   ) as fin_count,
>>>>>   IFNULL((
>>>>>   SELECT SUM(`xxxx_outcome_payment_value`)
>>>>>   FROM `xxxx`
>>>>>   WHERE EXTRACT(YEAR_MONTH FROM
>>>>> `xxxx_exp_end_date`)=EXTRACT(YEAR_MONTH FROM
>>>>> `calendar_month`.`calendar_month_date`) AND
>>>>> `xxxx_outcome_payment_claim_date` IS NULL
>>>>>   ),0) as fin_value
>>>>> FROM `ms`
>>>>> RIGHT JOIN `calendar_month`
>>>>> ON EXTRACT(YEAR_MONTH FROM `ms`.`ms_exp_date`)=EXTRACT(YEAR_MONTH FROM
>>>>> `calendar_month`.`calendar_month_date`)
>>>>> WHERE `calendar_month`.`calendar_month_date` BETWEEN DATE_FORMAT(NOW()
>>>>> ,'%Y-%m-01') AND DATE_ADD(DATE_FORMAT(NOW() ,'%Y-%m-01'),INTERVAL 12 MONTH)
>>>>> AND `ms`.`ms_claim_date` IS NULL
>>>>> GROUP BY EXTRACT(YEAR_MONTH FROM
>>>>> `calendar_month`.`calendar_month_date`)
>>>>> LIMIT 12
>>>>>
>>>>> Managed to get it down from *35.6576* seconds to *0.0139* seconds [?]
>>>>>
>>>>> Thanks everyone.  Can this be made any more efficient, table row
>>>>> counts for 'ms' just now are 10's of thousands, but will be into the
>>>>> several hundred thousand (possibly millions within a year)
>>>>>
>>>>>
>>>>>
>>>>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>>>>
>>>>>> I can show you some real world examples later of working tables full
>>>>>> of data. I find it much easier to explain that way
>>>>>>
>>>>>>
>>>>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>>>>> later
>>>>>>>
>>>>>>> Thanks for all the input, once we have a chat later - and formalize
>>>>>>> the problem better (there are normalization rules????? - just kidding - i
>>>>>>> was between a rock and a hard place, this works - just needs improved)
>>>>>>>
>>>>>>> If it still is giving me problems, we can pick up the conversation
>>>>>>> then.
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>> G
>>>>>>>
>>>>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>>>>  wrote:
>>>>>>>
>>>>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>> > table1
>>>>>>>> > table1.id: autonum
>>>>>>>> > active: bool
>>>>>>>> > t2id_1: int
>>>>>>>> > t2id_2: int
>>>>>>>> > t2id_3: int
>>>>>>>> > t2id_4: int
>>>>>>>> > t2id_5: int
>>>>>>>> > t2id_6: int
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > table2
>>>>>>>> > table2.id: autonum
>>>>>>>> > expected_date:  datetime
>>>>>>>> > actual_date:   datetime
>>>>>>>> > claim_date: datetime
>>>>>>>> > value: datetime
>>>>>>>>
>>>>>>>> There are several questions about the data structure that need to be
>>>>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>>>>> referenced by multiple table1 entries ?
>>>>>>>>
>>>>>>>> if the former, then the t2id_* fields are unnessary
>>>>>>>> if the latter, then they should be replaced with a link table.
>>>>>>>>
>>>>>>>> but the list might not be the place to thrash this out, will see you
>>>>>>>> later.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Hackspace mailing list
>>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> --
>>>>>> This e-mail and any files transmitted with it are confidential and
>>>>>> intended solely for the use of the individual or entity to whom they are
>>>>>> addressed.
>>>>>>
>>>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>>>> yn unig.
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Hackspace mailing list
>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>>
>>>>> On 18 May 2015 at 16:00, Emyr Morris <em at preseli.com> wrote:
>>>>>
>>>>>> I can show you some real world examples later of working tables full
>>>>>> of data. I find it much easier to explain that way
>>>>>>
>>>>>>
>>>>>> On Monday, May 18, 2015, Graham Owens <grahamowensuk at googlemail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Justin, I think you might be right - we can thrash it out a bit more
>>>>>>> later
>>>>>>>
>>>>>>> Thanks for all the input, once we have a chat later - and formalize
>>>>>>> the problem better (there are normalization rules????? - just kidding - i
>>>>>>> was between a rock and a hard place, this works - just needs improved)
>>>>>>>
>>>>>>> If it still is giving me problems, we can pick up the conversation
>>>>>>> then.
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>>> G
>>>>>>>
>>>>>>> On 18 May 2015 at 15:06, Justin Mitchell <justin at discordia.org.uk>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> On Mon, 2015-05-18 at 14:24 +0100, Graham Owens wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>> > table1
>>>>>>>> > table1.id: autonum
>>>>>>>> > active: bool
>>>>>>>> > t2id_1: int
>>>>>>>> > t2id_2: int
>>>>>>>> > t2id_3: int
>>>>>>>> > t2id_4: int
>>>>>>>> > t2id_5: int
>>>>>>>> > t2id_6: int
>>>>>>>> >
>>>>>>>> >
>>>>>>>> >
>>>>>>>> > table2
>>>>>>>> > table2.id: autonum
>>>>>>>> > expected_date:  datetime
>>>>>>>> > actual_date:   datetime
>>>>>>>> > claim_date: datetime
>>>>>>>> > value: datetime
>>>>>>>>
>>>>>>>> There are several questions about the data structure that need to be
>>>>>>>> asked here, will one table2 entry only be used once, or could it be
>>>>>>>> referenced by multiple table1 entries ?
>>>>>>>>
>>>>>>>> if the former, then the t2id_* fields are unnessary
>>>>>>>> if the latter, then they should be replaced with a link table.
>>>>>>>>
>>>>>>>> but the list might not be the place to thrash this out, will see you
>>>>>>>> later.
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Hackspace mailing list
>>>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> --
>>>>>> This e-mail and any files transmitted with it are confidential and
>>>>>> intended solely for the use of the individual or entity to whom they are
>>>>>> addressed.
>>>>>>
>>>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>>>> yn unig.
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Hackspace mailing list
>>>>>> Hackspace at swansea.hackspace.org.uk
>>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>>
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Hackspace mailing list
>>>>> Hackspace at swansea.hackspace.org.uk
>>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> This e-mail and any files transmitted with it are confidential and
>>>> intended solely for the use of the individual or entity to whom they are
>>>> addressed.
>>>>
>>>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>>>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>>>> yn unig.
>>>>
>>>> _______________________________________________
>>>> Hackspace mailing list
>>>> Hackspace at swansea.hackspace.org.uk
>>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>>
>>>>
>>>
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>>
>>>
>>
>>
>> --
>> This e-mail and any files transmitted with it are confidential and
>> intended solely for the use of the individual or entity to whom they are
>> addressed.
>>
>> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn
>> gyfrinachol ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt
>> yn unig.
>>
>
>
>
> --
> This e-mail and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they are
> addressed.
>
> Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
> ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From timmoore47 at gmail.com  Wed May 20 21:58:18 2015
From: timmoore47 at gmail.com (Tim Moore)
Date: Wed, 20 May 2015 21:58:18 +0100
Subject: [Swansea Hackspace] Serial usb ports - Help
Message-ID: <CAAEY5oMMaEuvdsH=6aY4+Ej0ta8-aEXwE6nDC3ksSWDRD=NhWw@mail.gmail.com>

I've got a aged Thinkpad with 4 USB 2 ports,

Its running Ubuntu 14.04 32 bit.

I'm trying to talk to a MicroMite using picocom.

But it doesn't find ttyusb0

Looking in /dev/  there are loads of tty's but not ttyusb0

Is it hiden in a sub-directoy ?

Any thoughts anyone as to how to use this laptop to access the MicroMite ?

( I suspect I used a RPi to access it last time, just before Christmas)

a puzzled,

Tim_1
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From alan at lxorguk.ukuu.org.uk  Wed May 20 22:52:20 2015
From: alan at lxorguk.ukuu.org.uk (Alan Cox)
Date: Wed, 20 May 2015 22:52:20 +0100
Subject: [Swansea Hackspace] Serial usb ports - Help
In-Reply-To: <CAAEY5oMMaEuvdsH=6aY4+Ej0ta8-aEXwE6nDC3ksSWDRD=NhWw@mail.gmail.com>
References: <CAAEY5oMMaEuvdsH=6aY4+Ej0ta8-aEXwE6nDC3ksSWDRD=NhWw@mail.gmail.com>
Message-ID: <20150520225220.0887a60d@www.etchedpixels.co.uk>

On Wed, 20 May 2015 21:58:18 +0100
Tim Moore <timmoore47 at gmail.com> wrote:

> I've got a aged Thinkpad with 4 USB 2 ports,
> 
> Its running Ubuntu 14.04 32 bit.
> 
> I'm trying to talk to a MicroMite using picocom.
> 
> But it doesn't find ttyusb0
> 
> Looking in /dev/  there are loads of tty's but not ttyusb0

What tty you get may depend upon the device your USB-serial dongle is
using. Generic ACM interfaces will be /dev/ttyACM* while the various USB
dongles will be /dev/ttyUSB* (note caps)

If the dongle USB identifier isn't known then you've got another problem
8)

Also check lsusb - make sure the device is visible!

Alan


From ceri.clatworthy at gmail.com  Thu May 21 06:14:30 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Thu, 21 May 2015 06:14:30 +0100
Subject: [Swansea Hackspace] Serial usb ports - Help
In-Reply-To: <20150520225220.0887a60d@www.etchedpixels.co.uk>
References: <CAAEY5oMMaEuvdsH=6aY4+Ej0ta8-aEXwE6nDC3ksSWDRD=NhWw@mail.gmail.com>
	<20150520225220.0887a60d@www.etchedpixels.co.uk>
Message-ID: <CAO=DJn_a1y4E9dsKEX9p3bW-TqMxUDGH1R8ZLb0-s319GORUZQ@mail.gmail.com>

You need a USB to Serial device.
Like the FTDI cable

Just a usb port is not a serial port
Ceri
On 20 May 2015 22:52, "Alan Cox" <alan at lxorguk.ukuu.org.uk> wrote:

> On Wed, 20 May 2015 21:58:18 +0100
> Tim Moore <timmoore47 at gmail.com> wrote:
>
> > I've got a aged Thinkpad with 4 USB 2 ports,
> >
> > Its running Ubuntu 14.04 32 bit.
> >
> > I'm trying to talk to a MicroMite using picocom.
> >
> > But it doesn't find ttyusb0
> >
> > Looking in /dev/  there are loads of tty's but not ttyusb0
>
> What tty you get may depend upon the device your USB-serial dongle is
> using. Generic ACM interfaces will be /dev/ttyACM* while the various USB
> dongles will be /dev/ttyUSB* (note caps)
>
> If the dongle USB identifier isn't known then you've got another problem
> 8)
>
> Also check lsusb - make sure the device is visible!
>
> Alan
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From rankin.dc at gmail.com  Thu May 21 09:31:52 2015
From: rankin.dc at gmail.com (David Rankin)
Date: Thu, 21 May 2015 09:31:52 +0100
Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin to
	350Kelvin)
Message-ID: <CAERuT19F1yJD4kJvTM87hCs-m19A6VfbaaaRqJsqtLrZF+nu5A@mail.gmail.com>

Hi All,

I am just messing around with my Audino and the temperature sensor. I
am wondering if it is this is even possible but I am trying to measure
low temperature sub -100Celsuis

So being very niave I tried it out in dry ice but when the sensor got
only got close to its limit, I took it out (-35).

I also looked around for better sensors and found these:
http://www.scientificinstruments.com/product-detail/model-si-440-silicon-diode-temperature-sensors/
http://www.scientificinstruments.com/product-detail/model-si-430-silicon-diode-temperature-sensors/

So what I was wondering. Is it even possible to put a aurdiono in a
cold cold fridge and meassure low temprtures with a better sensor? If
not why not?

Any advice or guidance would be really helpful?


From t.davies at swansea.ac.uk  Thu May 21 10:03:32 2015
From: t.davies at swansea.ac.uk (Davies T.)
Date: Thu, 21 May 2015 09:03:32 +0000
Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin
	to	350Kelvin)
In-Reply-To: <CAERuT19F1yJD4kJvTM87hCs-m19A6VfbaaaRqJsqtLrZF+nu5A@mail.gmail.com>
References: <CAERuT19F1yJD4kJvTM87hCs-m19A6VfbaaaRqJsqtLrZF+nu5A@mail.gmail.com>
Message-ID: <6FB643A267727643884C49BA9D61C9D66729DB96@ISS-MBX04.tawe.swan.ac.uk>

Dear David,

Are we measuring temperature on the Celsius or Rankine scale?
Well, that's got that over with.

Most commercial semiconductor devices are only specified from
0 to 50 Celsius. If you pay a bit more you can get extended temp
ranges e.g. -20 to +70, but beyond that you are looking at very
exotic (and expensive) parts. If you can place the sensor in the
fridge and keep the micro outside, you stand a chance.

Solid-state sensors e.g. Dallas are out, we are looking at
thermocouples and platinum 100 sensors - with their
associated amps outside the fridge, of course!

regards

Timothy Davies

________________________________________
From: hackspace-bounces at swansea.hackspace.org.uk [hackspace-bounces at swansea.hackspace.org.uk] on behalf of David Rankin [rankin.dc at gmail.com]
Sent: 21 May 2015 09:31
To: hackspace at swansea.hackspace.org.uk
Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin to  350Kelvin)
ve 
Hi All,

I am just messing around with my Audino and the temperature sensor. I
am wondering if it is this is even possible but I am trying to measure
low temperature sub -100Celsuis

So being very niave I tried it out in dry ice but when the sensor got
only got close to its limit, I took it out (-35).

I also looked around for better sensors and found these:
http://www.scientificinstruments.com/product-detail/model-si-440-silicon-diode-temperature-sensors/
http://www.scientificinstruments.com/product-detail/model-si-430-silicon-diode-temperature-sensors/

So what I was wondering. Is it even possible to put a aurdiono in a
cold cold fridge and meassure low temprtures with a better sensor? If
not why not?

Any advice or guidance would be really helpful?
_______________________________________________
Hackspace mailing list
Hackspace at swansea.hackspace.org.uk
http://swansea.hackspace.org.uk/mailman/listinfo/hackspace


From ceri.clatworthy at gmail.com  Thu May 21 10:05:07 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Thu, 21 May 2015 10:05:07 +0100
Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin to
	350Kelvin)
In-Reply-To: <CAERuT19F1yJD4kJvTM87hCs-m19A6VfbaaaRqJsqtLrZF+nu5A@mail.gmail.com>
References: <CAERuT19F1yJD4kJvTM87hCs-m19A6VfbaaaRqJsqtLrZF+nu5A@mail.gmail.com>
Message-ID: <CAO=DJn_XMDGnfHw4H9O3A0PsN7rzTeCsVxNMpNOrJZQD6cZpbQ@mail.gmail.com>

I would recommend a thermocouple,

cheep K type 0 - 1024 Cent.

but according to Wikipedia (http://en.wikipedia.org/wiki/Thermocouple)
'T' Type can go down to -185 C.

Normally I would use MAX6675, or MAX31855

which is a bit expensive but the latter claims to go down to -270 C

But I cannot test that :)

also both chips have a digital interface, - no messy analogue. nice clean
number :)

I have one set up on some kit here if you got some dry ice (Ha,Ha,)
Cheers

Ceri

On Thu, May 21, 2015 at 9:31 AM, David Rankin <rankin.dc at gmail.com> wrote:

> Hi All,
>
> I am just messing around with my Audino and the temperature sensor. I
> am wondering if it is this is even possible but I am trying to measure
> low temperature sub -100Celsuis
>
> So being very niave I tried it out in dry ice but when the sensor got
> only got close to its limit, I took it out (-35).
>
> I also looked around for better sensors and found these:
>
> http://www.scientificinstruments.com/product-detail/model-si-440-silicon-diode-temperature-sensors/
>
> http://www.scientificinstruments.com/product-detail/model-si-430-silicon-diode-temperature-sensors/
>
> So what I was wondering. Is it even possible to put a aurdiono in a
> cold cold fridge and meassure low temprtures with a better sensor? If
> not why not?
>
> Any advice or guidance would be really helpful?
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From ceri.clatworthy at gmail.com  Thu May 21 10:32:30 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Thu, 21 May 2015 10:32:30 +0100
Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin to
	350Kelvin)
In-Reply-To: <6FB643A267727643884C49BA9D61C9D66729DB96@ISS-MBX04.tawe.swan.ac.uk>
References: <CAERuT19F1yJD4kJvTM87hCs-m19A6VfbaaaRqJsqtLrZF+nu5A@mail.gmail.com>
	<6FB643A267727643884C49BA9D61C9D66729DB96@ISS-MBX04.tawe.swan.ac.uk>
Message-ID: <CAO=DJn-kHMOSqwQH8vFt164QxA=KT5iW7RkmgUkgiSVquMhAJA@mail.gmail.com>

The butie of the MAX 31855 is there is only Thermocouple, (connector)
 MAX31855, micro !!

No amps etc.

On Thu, May 21, 2015 at 10:03 AM, Davies T. <t.davies at swansea.ac.uk> wrote:

> Dear David,
>
> Are we measuring temperature on the Celsius or Rankine scale?
> Well, that's got that over with.
>
> Most commercial semiconductor devices are only specified from
> 0 to 50 Celsius. If you pay a bit more you can get extended temp
> ranges e.g. -20 to +70, but beyond that you are looking at very
> exotic (and expensive) parts. If you can place the sensor in the
> fridge and keep the micro outside, you stand a chance.
>
> Solid-state sensors e.g. Dallas are out, we are looking at
> thermocouples and platinum 100 sensors - with their
> associated amps outside the fridge, of course!
>
> regards
>
> Timothy Davies
>
> ________________________________________
> From: hackspace-bounces at swansea.hackspace.org.uk [
> hackspace-bounces at swansea.hackspace.org.uk] on behalf of David Rankin [
> rankin.dc at gmail.com]
> Sent: 21 May 2015 09:31
> To: hackspace at swansea.hackspace.org.uk
> Subject: [Swansea Hackspace] Help with Tempreture sensor (100Kelvin to
> 350Kelvin)
> ve
> Hi All,
>
> I am just messing around with my Audino and the temperature sensor. I
> am wondering if it is this is even possible but I am trying to measure
> low temperature sub -100Celsuis
>
> So being very niave I tried it out in dry ice but when the sensor got
> only got close to its limit, I took it out (-35).
>
> I also looked around for better sensors and found these:
>
> http://www.scientificinstruments.com/product-detail/model-si-440-silicon-diode-temperature-sensors/
>
> http://www.scientificinstruments.com/product-detail/model-si-430-silicon-diode-temperature-sensors/
>
> So what I was wondering. Is it even possible to put a aurdiono in a
> cold cold fridge and meassure low temprtures with a better sensor? If
> not why not?
>
> Any advice or guidance would be really helpful?
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From ceri.clatworthy at gmail.com  Fri May 22 15:24:19 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Fri, 22 May 2015 15:24:19 +0100
Subject: [Swansea Hackspace] Laser safety
Message-ID: <CAO=DJn8nzuo9YNBR1QTdY5vhRuCpgbM=PkkAmKgD4CuyLotz0w@mail.gmail.com>

Found these. ..

0.2" pitch screw terminal. . And some
PCB s
For interlock chain. ...
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From em at preseli.com  Sat May 23 18:32:43 2015
From: em at preseli.com (Emyr Morris)
Date: Sat, 23 May 2015 18:32:43 +0100
Subject: [Swansea Hackspace] article on hackaday - Video Truptych
Message-ID: <CAGAFX7Mds8fafmSwJDT2rnY3jT7L1Her67QBVWVuHSUmRg-iow@mail.gmail.com>

http://hackaday.com/2015/05/19/raspberry-pis-and-a-video-triptych/

nice!

-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
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From djdavies83 at hotmail.com  Sat May 23 21:04:43 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Sat, 23 May 2015 21:04:43 +0100
Subject: [Swansea Hackspace] Battery dying, help.
Message-ID: <DUB406-EAS1284D659D0E9059B4772254C6CF0@phx.gbl>

Hey guys, out on wind street for the first time in ages...

Down to 15% battery, is there a micro usb cable in the hacks pace so I can leave it on charge there for a bit?


No animals were harmed in the making of this email. However, several thousand electrons were severely inconvenienced.
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From eclipse at sucs.org  Sat May 23 21:10:54 2015
From: eclipse at sucs.org (Tim)
Date: Sat, 23 May 2015 21:10:54 +0100
Subject: [Swansea Hackspace] Battery dying, help.
In-Reply-To: <DUB406-EAS1284D659D0E9059B4772254C6CF0@phx.gbl>
References: <DUB406-EAS1284D659D0E9059B4772254C6CF0@phx.gbl>
Message-ID: <5560DECE.2050608@sucs.org>

Sorry, I don?t think we have microusb

Tim

On 23/05/15 21:04, David Davies-Day wrote:
> Hey guys, out on wind street for the first time in ages...
>
> Down to 15% battery, is there a micro usb cable in the hacks pace so I 
> can leave it on charge there for a bit?
>
>
> No animals were harmed in the making of this email. However, several 
> thousand electrons were severely inconvenienced.
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace

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From djdavies83 at hotmail.com  Sat May 23 21:34:17 2015
From: djdavies83 at hotmail.com (David Davies-Day)
Date: Sat, 23 May 2015 20:34:17 +0000
Subject: [Swansea Hackspace] Battery dying, help.
In-Reply-To: <5560DECE.2050608@sucs.org>
References: <DUB406-EAS1284D659D0E9059B4772254C6CF0@phx.gbl>,
	<5560DECE.2050608@sucs.org>
Message-ID: <DUB116-W91E43D9B5F44E6258F6A59C6CF0@phx.gbl>

Bummer, thanks Tim, might have a squint on my way passed. 

Date: Sat, 23 May 2015 21:10:54 +0100
From: eclipse at sucs.org
To: hackspace at swansea.hackspace.org.uk
Subject: Re: [Swansea Hackspace] Battery dying, help.


  
    
  
  
    Sorry, I don?t think we have microusb

    

    Tim

    

    On 23/05/15 21:04, David Davies-Day
      wrote:

    
    
      
      Hey guys, out on wind street for the first time in ages...
      

      
      Down to 15% battery, is there a micro usb cable in the hacks
        pace so I can leave it on charge there for a bit?
      

      
      

      
      No animals
        were harmed in the making of this email. However, several
        thousand electrons were severely inconvenienced.

      
      

      _______________________________________________
Hackspace mailing list
Hackspace at swansea.hackspace.org.uk
http://swansea.hackspace.org.uk/mailman/listinfo/hackspace

    
    

  


_______________________________________________
Hackspace mailing list
Hackspace at swansea.hackspace.org.uk
http://swansea.hackspace.org.uk/mailman/listinfo/hackspace 		 	   		  
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From em at preseli.com  Sun May 24 16:52:32 2015
From: em at preseli.com (Emyr Morris)
Date: Sun, 24 May 2015 16:52:32 +0100
Subject: [Swansea Hackspace] scary
Message-ID: <CAGAFX7PydOHVcqYyNKCsiU_pnYT1+ya=RcchVd4aEA3PdeHR1Q@mail.gmail.com>

http://hackaday.com/2015/05/23/pictures-that-defeat-key-locks/



-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
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From ceri.clatworthy at gmail.com  Mon May 25 17:53:35 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Mon, 25 May 2015 17:53:35 +0100
Subject: [Swansea Hackspace] RS485
Message-ID: <CAO=DJn_0TvrwvhL779fzKSyL8k3sWHz4HsmcS4EB7_TQqjHR_g@mail.gmail.com>

Hi does anyone have a RS485 to USB
Or RS485 to RS232

I Can borrow for a day or two.
Got a new bit of kit.
But can't get my PC to communicate with
It.

Think it uses pins 2.3. And 5 of 9 Way D.

But don't think unit is serial RS232.

Cheers
Ceri
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From eclipse at sucs.org  Mon May 25 21:15:33 2015
From: eclipse at sucs.org (Tim)
Date: Mon, 25 May 2015 21:15:33 +0100
Subject: [Swansea Hackspace] RS485
In-Reply-To: <CAO=DJn_0TvrwvhL779fzKSyL8k3sWHz4HsmcS4EB7_TQqjHR_g@mail.gmail.com>
References: <CAO=DJn_0TvrwvhL779fzKSyL8k3sWHz4HsmcS4EB7_TQqjHR_g@mail.gmail.com>
Message-ID: <556382E5.8060901@sucs.org>

I have some of these 
http://uk.farnell.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=15001&langId=44&urlRequestType=Base&partNumber=1470451&storeId=10151 
somwhere if they are any use, no usb though.

Tim

On 25/05/15 17:53, Ceri Clatworthy wrote:
>
> Hi does anyone have a RS485 to USB
> Or RS485 to RS232
>
> I Can borrow for a day or two.
> Got a new bit of kit.
> But can't get my PC to communicate with
> It.
>
> Think it uses pins 2.3. And 5 of 9 Way D.
>
> But don't think unit is serial RS232.
>
> Cheers
> Ceri
>
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace

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From justin at discordia.org.uk  Mon May 25 21:26:49 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Mon, 25 May 2015 21:26:49 +0100
Subject: [Swansea Hackspace] RS485
In-Reply-To: <CAO=DJn_0TvrwvhL779fzKSyL8k3sWHz4HsmcS4EB7_TQqjHR_g@mail.gmail.com>
References: <CAO=DJn_0TvrwvhL779fzKSyL8k3sWHz4HsmcS4EB7_TQqjHR_g@mail.gmail.com>
Message-ID: <1432585609.31417.0.camel@emerald.geode.org.uk>

On Mon, 2015-05-25 at 17:53 +0100, Ceri Clatworthy wrote:
> Hi does anyone have a RS485 to USB 
> Or RS485 to RS232
> 
> I Can borrow for a day or two. 
> Got a new bit of kit.
> But can't get my PC to communicate with
> It.

Think i have some MAX485 chips somewhere, but thats about it.




From ceri.clatworthy at gmail.com  Tue May 26 07:36:42 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Tue, 26 May 2015 07:36:42 +0100
Subject: [Swansea Hackspace] RS485
In-Reply-To: <1432585609.31417.0.camel@emerald.geode.org.uk>
References: <CAO=DJn_0TvrwvhL779fzKSyL8k3sWHz4HsmcS4EB7_TQqjHR_g@mail.gmail.com>
	<1432585609.31417.0.camel@emerald.geode.org.uk>
Message-ID: <CAO=DJn-As1c-QWQhuJr5HZuAckp=im5zto8WXn_xH0FDpbgjQQ@mail.gmail.com>

Thanks guys. .
Would appreciate that.
I will make an adapter in anticipation. .

Cheers
Ceri
On 25 May 2015 21:27, "Justin Mitchell" <justin at discordia.org.uk> wrote:

> On Mon, 2015-05-25 at 17:53 +0100, Ceri Clatworthy wrote:
> > Hi does anyone have a RS485 to USB
> > Or RS485 to RS232
> >
> > I Can borrow for a day or two.
> > Got a new bit of kit.
> > But can't get my PC to communicate with
> > It.
>
> Think i have some MAX485 chips somewhere, but thats about it.
>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From gerrit.niezen at gmail.com  Tue May 26 12:20:44 2015
From: gerrit.niezen at gmail.com (Gerrit Niezen)
Date: Tue, 26 May 2015 12:20:44 +0100
Subject: [Swansea Hackspace] Meridian tower soldering kit
Message-ID: <CAPqi54BGwcRzsqOaUy_QSQqbQrpfRf-Et66+FXPHw=0Moba4aQ@mail.gmail.com>

Hi there! :)

Inspired by the Blinky Buildings Kit (
http://www.lunchboxelectronics.com/product/blinkybuildings) from the book
"Building Open Source Hardware", I wanted to make a soldering kit that
features Swansea's Meridian Tower instead of the boring old Empire State
building.

What does it do? You can program the little microcontroller to have the 20
LEDs blink different sequences (using charlieplexing).

I'm attaching a draft(!) image of what the board will look like. (For
example, I still want to do manual routing instead of auto-routing, and
move the components around to include a coin-cell battery holder). If you'd
be interested in getting a board like this, let me know!

Cheers,
Gerrit



PS - The tower silkscreen was re-mixed from a design by Jade Lundie who
works in TechHub - you can see her her original design on Dribble:
https://dribbble.com/shots/2021302-Sky-Tower
?
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From em at preseli.com  Tue May 26 12:28:08 2015
From: em at preseli.com (Emyr Morris)
Date: Tue, 26 May 2015 12:28:08 +0100
Subject: [Swansea Hackspace] Meridian tower soldering kit
In-Reply-To: <CAPqi54BGwcRzsqOaUy_QSQqbQrpfRf-Et66+FXPHw=0Moba4aQ@mail.gmail.com>
References: <CAPqi54BGwcRzsqOaUy_QSQqbQrpfRf-Et66+FXPHw=0Moba4aQ@mail.gmail.com>
Message-ID: <CAGAFX7OczYBMQOxcAFdHPg_T1=MmwSg-RfoQNG=kGEYVwDV1iw@mail.gmail.com>

that is lovely - put me down for two please (in case I break one)

ta

Em

On 26 May 2015 at 12:20, Gerrit Niezen <gerrit.niezen at gmail.com> wrote:

> Hi there! :)
>
> Inspired by the Blinky Buildings Kit (
> http://www.lunchboxelectronics.com/product/blinkybuildings) from the book
> "Building Open Source Hardware", I wanted to make a soldering kit that
> features Swansea's Meridian Tower instead of the boring old Empire State
> building.
>
> What does it do? You can program the little microcontroller to have the 20
> LEDs blink different sequences (using charlieplexing).
>
> I'm attaching a draft(!) image of what the board will look like. (For
> example, I still want to do manual routing instead of auto-routing, and
> move the components around to include a coin-cell battery holder). If you'd
> be interested in getting a board like this, let me know!
>
> Cheers,
> Gerrit
>
>
>
> PS - The tower silkscreen was re-mixed from a design by Jade Lundie who
> works in TechHub - you can see her her original design on Dribble:
> https://dribbble.com/shots/2021302-Sky-Tower
> ?
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>


-- 
This e-mail and any files transmitted with it are confidential and intended
solely for the use of the individual or entity to whom they are addressed.

Mae'r e-bost hwn ac unrhyw ffeiliau a drosglwyddir gydag ef yn gyfrinachol
ac at ddefnydd yr unigolyn neu'r corff y cyfeiriwyd hwy atynt yn unig.
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From jon.j.lilley at gmail.com  Tue May 26 12:32:39 2015
From: jon.j.lilley at gmail.com (jon lilley)
Date: Tue, 26 May 2015 12:32:39 +0100
Subject: [Swansea Hackspace] Meridian tower soldering kit
In-Reply-To: <CAPqi54BGwcRzsqOaUy_QSQqbQrpfRf-Et66+FXPHw=0Moba4aQ@mail.gmail.com>
References: <CAPqi54BGwcRzsqOaUy_QSQqbQrpfRf-Et66+FXPHw=0Moba4aQ@mail.gmail.com>
Message-ID: <CAHLFiFDth5MmwohtH-e=1CkL7eTs1jZmaAt0nHdeqXTbQmiMug@mail.gmail.com>

Could I suggest a tasteful "A Present From Swansea" on the silkscreen to
cater for the tourist trade? :)
On 26 May 2015 12:21 pm, "Gerrit Niezen" <gerrit.niezen at gmail.com> wrote:

> Hi there! :)
>
> Inspired by the Blinky Buildings Kit (
> http://www.lunchboxelectronics.com/product/blinkybuildings) from the book
> "Building Open Source Hardware", I wanted to make a soldering kit that
> features Swansea's Meridian Tower instead of the boring old Empire State
> building.
>
> What does it do? You can program the little microcontroller to have the 20
> LEDs blink different sequences (using charlieplexing).
>
> I'm attaching a draft(!) image of what the board will look like. (For
> example, I still want to do manual routing instead of auto-routing, and
> move the components around to include a coin-cell battery holder). If you'd
> be interested in getting a board like this, let me know!
>
> Cheers,
> Gerrit
>
>
>
> PS - The tower silkscreen was re-mixed from a design by Jade Lundie who
> works in TechHub - you can see her her original design on Dribble:
> https://dribbble.com/shots/2021302-Sky-Tower
> ?
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From justin at swansea.hackspace.org.uk  Tue May 26 13:10:27 2015
From: justin at swansea.hackspace.org.uk (Justin Mitchell)
Date: Tue, 26 May 2015 13:10:27 +0100
Subject: [Swansea Hackspace] Laser Cutter progress
Message-ID: <1432642227.6184.16.camel@justin.llw.rokcorp.com>

We are making excellent progress with the laser cutter, it has now been
fitted with many interlocks and safeguards to prevent accidental
exposure to the laser when it is operating, and to obscure all those
places where you could previously peek inside.

We have one more safeguard to complete, which will ensure that the water
cooling is operating before you can fire the laser, which is for it's
protection more than ours.

Once this is complete and we update the various safety notices we should
be able to run some real jobs through it, and give training to the very
keenest of members. The software to drive it is still the supplied
windows tool, and is therefore not the easiest to work with, but we will
be replacing the control electronics and offering a more familiar
interface to it in the near future, we just wanted to get the device
operational as soon as possible.

Can people please login to the website and vote on the courses they
would most like to see so that we can prepare notes and materials.


Image: Minimum Power setting cutting text into paper
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From ceri.clatworthy at gmail.com  Tue May 26 13:34:45 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Tue, 26 May 2015 13:34:45 +0100
Subject: [Swansea Hackspace] Laser Cutter progress
In-Reply-To: <1432642227.6184.16.camel@justin.llw.rokcorp.com>
References: <1432642227.6184.16.camel@justin.llw.rokcorp.com>
Message-ID: <CAO=DJn8Fi=a-VaBUKFeni8oRTfKB-TAjwO5XMNRO+_S9ShL=kg@mail.gmail.com>

Whoop Whoop

Definitely got a few things to cut !!
Ceri

On Tue, May 26, 2015 at 1:10 PM, Justin Mitchell <
justin at swansea.hackspace.org.uk> wrote:

>  We are making excellent progress with the laser cutter, it has now been
> fitted with many interlocks and safeguards to prevent accidental exposure
> to the laser when it is operating, and to obscure all those places where
> you could previously peek inside.
>
> We have one more safeguard to complete, which will ensure that the water
> cooling is operating before you can fire the laser, which is for it's
> protection more than ours.
>
> Once this is complete and we update the various safety notices we should
> be able to run some real jobs through it, and give training to the very
> keenest of members. The software to drive it is still the supplied windows
> tool, and is therefore not the easiest to work with, but we will be
> replacing the control electronics and offering a more familiar interface to
> it in the near future, we just wanted to get the device operational as soon
> as possible.
>
> Can people please login to the website and vote on the courses they would
> most like to see so that we can prepare notes and materials.
>
>
> Image: Minimum Power setting cutting text into paper
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From djdavies83 at hotmail.com  Sat May 30 15:10:06 2015
From: djdavies83 at hotmail.com (David davies)
Date: Sat, 30 May 2015 15:10:06 +0100
Subject: [Swansea Hackspace] NodeMcu Lua WIFI Development Board For ESP8266
	Module Sale-Banggood.com
Message-ID: <DUB406-EAS27059B96133E078269240A0C6C80@phx.gbl>

http://www.banggood.com/NodeMcu-Lua-WIFI-Development-Board-For-ESP8266-Module-p-976440.html

All my ESP8266 boards are currently MIA, so I was looking at ordering another from Banggood.

Does this one look like a HUZZAH clone with added usb-serial? Do you think it will work with Arduino IDE mentioned in the Ladyada article?

https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide

From ceri.clatworthy at gmail.com  Sat May 30 16:53:17 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Sat, 30 May 2015 16:53:17 +0100
Subject: [Swansea Hackspace] NodeMcu Lua WIFI Development Board For
 ESP8266 Module Sale-Banggood.com
In-Reply-To: <DUB406-EAS27059B96133E078269240A0C6C80@phx.gbl>
References: <DUB406-EAS27059B96133E078269240A0C6C80@phx.gbl>
Message-ID: <CAO=DJn9fEx1sSBfdB0NuM1wLo20oP0sORWKHjH0yhxcsn7JSsw@mail.gmail.com>

I want one
Ceri
On 30 May 2015 15:10, "David davies" <djdavies83 at hotmail.com> wrote:

>
> http://www.banggood.com/NodeMcu-Lua-WIFI-Development-Board-For-ESP8266-Module-p-976440.html
>
> All my ESP8266 boards are currently MIA, so I was looking at ordering
> another from Banggood.
>
> Does this one look like a HUZZAH clone with added usb-serial? Do you think
> it will work with Arduino IDE mentioned in the Ladyada article?
>
>
> https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/using-arduino-ide
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From richard.morgan at avocation.co.uk  Sun May 31 11:04:58 2015
From: richard.morgan at avocation.co.uk (Richard Morgan)
Date: Sun, 31 May 2015 10:04:58 +0000
Subject: [Swansea Hackspace] Laser Cutter progress
In-Reply-To: <1432642227.6184.16.camel@justin.llw.rokcorp.com>
References: <1432642227.6184.16.camel@justin.llw.rokcorp.com>
Message-ID: <CANSRvvAzOVTmLupJSMT-CjFJ8wbgAwkzjsqWzFVqghq9t92NdQ@mail.gmail.com>

Well done all.

Can you put a link to the 'voting' page on the site for the courses - might
be user error but I can't find it...

Thanks,

Richard


On Tue, 26 May 2015 at 13:10 Justin Mitchell <
justin at swansea.hackspace.org.uk> wrote:

>  We are making excellent progress with the laser cutter, it has now been
> fitted with many interlocks and safeguards to prevent accidental exposure
> to the laser when it is operating, and to obscure all those places where
> you could previously peek inside.
>
> We have one more safeguard to complete, which will ensure that the water
> cooling is operating before you can fire the laser, which is for it's
> protection more than ours.
>
> Once this is complete and we update the various safety notices we should
> be able to run some real jobs through it, and give training to the very
> keenest of members. The software to drive it is still the supplied windows
> tool, and is therefore not the easiest to work with, but we will be
> replacing the control electronics and offering a more familiar interface to
> it in the near future, we just wanted to get the device operational as soon
> as possible.
>
> Can people please login to the website and vote on the courses they would
> most like to see so that we can prepare notes and materials.
>
>
> Image: Minimum Power setting cutting text into paper
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
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From ceri.clatworthy at gmail.com  Sun May 31 15:54:29 2015
From: ceri.clatworthy at gmail.com (Ceri Clatworthy)
Date: Sun, 31 May 2015 15:54:29 +0100
Subject: [Swansea Hackspace] Laser Cutter progress
In-Reply-To: <CANSRvvAzOVTmLupJSMT-CjFJ8wbgAwkzjsqWzFVqghq9t92NdQ@mail.gmail.com>
References: <1432642227.6184.16.camel@justin.llw.rokcorp.com>
	<CANSRvvAzOVTmLupJSMT-CjFJ8wbgAwkzjsqWzFVqghq9t92NdQ@mail.gmail.com>
Message-ID: <CAO=DJn-v8i0XgyzjHrq8OATZF61UP-YegJsOUPoi3iy0pEvwgg@mail.gmail.com>

Did anyone get the aluminium L section
For the front and back doors? ?

I have been out today. .
Bun can't find any..
At a sensible price / size

Looks like a trip to B&Q
If now one else has....

Ceri
On 31 May 2015 11:09, "Richard Morgan" <richard.morgan at avocation.co.uk>
wrote:

> Well done all.
>
> Can you put a link to the 'voting' page on the site for the courses -
> might be user error but I can't find it...
>
> Thanks,
>
> Richard
>
>
> On Tue, 26 May 2015 at 13:10 Justin Mitchell <
> justin at swansea.hackspace.org.uk> wrote:
>
>>  We are making excellent progress with the laser cutter, it has now been
>> fitted with many interlocks and safeguards to prevent accidental exposure
>> to the laser when it is operating, and to obscure all those places where
>> you could previously peek inside.
>>
>> We have one more safeguard to complete, which will ensure that the water
>> cooling is operating before you can fire the laser, which is for it's
>> protection more than ours.
>>
>> Once this is complete and we update the various safety notices we should
>> be able to run some real jobs through it, and give training to the very
>> keenest of members. The software to drive it is still the supplied windows
>> tool, and is therefore not the easiest to work with, but we will be
>> replacing the control electronics and offering a more familiar interface to
>> it in the near future, we just wanted to get the device operational as soon
>> as possible.
>>
>> Can people please login to the website and vote on the courses they would
>> most like to see so that we can prepare notes and materials.
>>
>>
>> Image: Minimum Power setting cutting text into paper
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>
> _______________________________________________
> Hackspace mailing list
> Hackspace at swansea.hackspace.org.uk
> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>
>
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From justin at discordia.org.uk  Sun May 31 16:05:13 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Sun, 31 May 2015 16:05:13 +0100
Subject: [Swansea Hackspace] Laser Cutter progress
In-Reply-To: <CAO=DJn-v8i0XgyzjHrq8OATZF61UP-YegJsOUPoi3iy0pEvwgg@mail.gmail.com>
Message-ID: <80805872-4bb3-4a1a-b95a-bea10e0fd821@email.android.com>

Yes, been, done, and fitted a week or so ago, I found 10x15mm ALU corner in b&q.

Need some help in working out why the flow sensor is playing up but it's otherwise ready to use, albeit with the original control board.

On 31 May 2015 3:54 pm, Ceri Clatworthy <ceri.clatworthy at gmail.com> wrote:
>
> Did anyone get the aluminium L section 
> For the front and back doors? ?
>
> I have been out today. .
> Bun can't find any..
> At a sensible price / size
>
> Looks like a trip to B&Q
> If now one else has....
>
> Ceri
>
> On 31 May 2015 11:09, "Richard Morgan" <richard.morgan at avocation.co.uk> wrote:
>>
>> Well done all.
>>
>> Can you put a link to the 'voting' page on?the site for the courses - might be user error but I can't find it...
>>
>> Thanks,
>>
>> Richard
>>
>>
>> On Tue, 26 May 2015 at 13:10 Justin Mitchell <justin at swansea.hackspace.org.uk> wrote:
>>>
>>> We are making excellent progress with the laser cutter, it has now been fitted with many interlocks and safeguards to prevent accidental exposure to the laser when it is operating, and to obscure all those places where you could previously peek inside.
>>>
>>> We have one more safeguard to complete, which will ensure that the water cooling is operating before you can fire the laser, which is for it's protection more than ours.
>>>
>>> Once this is complete and we update the various safety notices we should be able to run some real jobs through it, and give training to the very keenest of members. The software to drive it is still the supplied windows tool, and is therefore not the easiest to work with, but we will be replacing the control electronics and offering a more familiar interface to it in the near future, we just wanted to get the device operational as soon as possible.
>>>
>>> Can people please login to the website and vote on the courses they would most like to see so that we can prepare notes and materials.
>>>
>>>
>>> Image: Minimum Power setting cutting text into paper
>>> _______________________________________________
>>> Hackspace mailing list
>>> Hackspace at swansea.hackspace.org.uk
>>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
>>

From justin at discordia.org.uk  Sun May 31 19:13:05 2015
From: justin at discordia.org.uk (Justin Mitchell)
Date: Sun, 31 May 2015 19:13:05 +0100
Subject: [Swansea Hackspace] RS485
In-Reply-To: <CAO=DJn-As1c-QWQhuJr5HZuAckp=im5zto8WXn_xH0FDpbgjQQ@mail.gmail.com>
Message-ID: <289d96b6-aad6-4466-a77f-cc0d193fd434@email.android.com>

Found SCMAX485CPA and SCLTC485CN8 of they are of any use to you

On 26 May 2015 7:36 am, Ceri Clatworthy <ceri.clatworthy at gmail.com> wrote:
>
> Thanks guys. .
> Would appreciate that.
> I will make an adapter in anticipation. .
>
> Cheers 
> Ceri
>
> On 25 May 2015 21:27, "Justin Mitchell" <justin at discordia.org.uk> wrote:
>>
>> On Mon, 2015-05-25 at 17:53 +0100, Ceri Clatworthy wrote:
>> > Hi does anyone have a RS485 to USB
>> > Or RS485 to RS232
>> >
>> > I Can borrow for a day or two.
>> > Got a new bit of kit.
>> > But can't get my PC to communicate with
>> > It.
>>
>> Think i have some MAX485 chips somewhere, but thats about it.
>>
>>
>> _______________________________________________
>> Hackspace mailing list
>> Hackspace at swansea.hackspace.org.uk
>> http://swansea.hackspace.org.uk/mailman/listinfo/hackspace

From justin at swansea.hackspace.org.uk  Sun May 31 20:35:41 2015
From: justin at swansea.hackspace.org.uk (Justin Mitchell)
Date: Sun, 31 May 2015 20:35:41 +0100
Subject: [Swansea Hackspace] Laser Cutter progress
In-Reply-To: <CANSRvvAzOVTmLupJSMT-CjFJ8wbgAwkzjsqWzFVqghq9t92NdQ@mail.gmail.com>
References: <1432642227.6184.16.camel@justin.llw.rokcorp.com>
	<CANSRvvAzOVTmLupJSMT-CjFJ8wbgAwkzjsqWzFVqghq9t92NdQ@mail.gmail.com>
Message-ID: <1433100941.17613.4.camel@emerald.geode.org.uk>

On Sun, 2015-05-31 at 10:04 +0000, Richard Morgan wrote:


> Can you put a link to the 'voting' page on the site for the courses -
> might be user error but I can't find it...

Front page, top right corner where the 'next meeting' link usually is.

Also on the upcoming meetings page where the future meetings aren't.


Someone really should get on and actually arrange one soon, but there is
hesitation to do anything before the impending move.