[Swansea Hackspace] Arduino Uno interface to a 3D printer stepper motor.
Tim Moore
timmoore47 at gmail.com
Fri May 8 17:58:56 BST 2015
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
>>>>> > >>>
>>>>> > >>
>>>>> > >> _______________________________________________
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>>>>> > >
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