<div dir="ltr"><div><div><div><div><div>Magic blue smoke was released ! : ((( So I've ordered another from China.<br><br></div>I'll double check everything, as H configuration can short +12V to ground so easily ! Software can do that ! ?<br><br></div>On another matter the L298N has two little cans marked '220 35V UT', I've pnly recently come across them. What are they ?<br><br></div>Is there any favoured software to drive them that is known to work Arduino friendly?<br><br></div>Many many thanks for responding !<br><br>: )))<br><br></div>Tim_1<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 8 May 2015 at 22:03, Ceri Clatworthy <span dir="ltr"><<a href="mailto:ceri.clatworthy@gmail.com" target="_blank">ceri.clatworthy@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Fetch in in Monday an we will get it going </p>
<p dir="ltr">Unless the magic blue smoke has been released <br><span class="HOEnZb"><font color="#888888">
Ceri</font></span></p><div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On 8 May 2015 17:59, "Tim Moore" <<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div><div>Well made sort of progress:-<br><br></div>Got a 3D stepper type 17H16-2994S in the hope it would be powerful enough to drive the thing I want to rotate.<br><br></div>Based on an Arduino Uno with a L298N stepper controller,<br><br></div>I found this software which I adapted for just one motor.<br><br></div>quote<br><br>// connect motor controller pins to Arduino digital pins<br>// motor one<br>int enA = 10;<br>int in1 = 9;<br>int in2 = 8;<br>// motor two<br>// int enB = 5;<br>// int in3 = 7;<br>// int in4 = 6;<br>void setup()<br>{<br> // set all the motor control pins to outputs<br> pinMode(enA, OUTPUT);<br> // pinMode(enB, OUTPUT);<br> pinMode(in1, OUTPUT);<br> pinMode(in2, OUTPUT);<br> // pinMode(in3, OUTPUT);<br> // pinMode(in4, OUTPUT);<br>}<br>void demoOne()<br>{<br> // this function will run the motors in both directions at a fixed speed<br> // turn on motor A<br> digitalWrite(in1, HIGH);<br> digitalWrite(in2, LOW);<br> // set speed to 200 out of possible range 0~255<br> analogWrite(enA, 200);<br> // turn on motor B<br> // digitalWrite(in3, HIGH);<br> // digitalWrite(in4, LOW);<br> // set speed to 200 out of possible range 0~255<br> // analogWrite(enB, 200);<br> delay(2000);<br> // now change motor directions<br> digitalWrite(in1, LOW);<br> digitalWrite(in2, HIGH); <br> // digitalWrite(in3, LOW);<br> // digitalWrite(in4, HIGH); <br> //delay(2000);<br> // now turn off motors<br> digitalWrite(in1, LOW);<br> digitalWrite(in2, LOW); <br> // digitalWrite(in3, LOW);<br> // digitalWrite(in4, LOW);<br>}<br>void demoTwo()<br>{<br> // this function will run the motors across the range of possible speeds<br> // note that maximum speed is determined by the motor itself and the operating voltage<br> // the PWM values sent by analogWrite() are fractions of the maximum speed possible <br> // by your hardware<br> // turn on motors<br> digitalWrite(in1, LOW);<br> digitalWrite(in2, HIGH); <br> // digitalWrite(in3, LOW);<br> // digitalWrite(in4, HIGH); <br> // accelerate from zero to maximum speed<br> for (int i = 0; i < 256; i++)<br> {<br> analogWrite(enA, i);<br> // analogWrite(enB, i);<br> delay(20);<br> } <br> // decelerate from maximum speed to zero<br> for (int i = 255; i >= 0; --i)<br> {<br> analogWrite(enA, i);<br> // analogWrite(enB, i);<br> delay(20);<br> } <br> // now turn off motors<br> digitalWrite(in1, LOW);<br> digitalWrite(in2, LOW); <br> // digitalWrite(in3, LOW);<br> // digitalWrite(in4, LOW); <br>}<br>void loop()<br>{<br> demoOne();<br> delay(1000);<br> demoTwo();<br> delay(1000);<br>}<br><br><br></div>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 !<br><br></div>Now I've checked the Arduino Uno and it seems aok.<br><br></div>The stepper motor measure 2.7 Ohm from the +12v rail to nearest motor pin, ditto earth to nearest pin.<br><br></div>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.<br><br></div>I've assumed that's a sign that I've not killed the stepper motor.<br><br></div>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*<br><br></div>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..)<br><br>: )<br><br></div>Tim_1<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 19 April 2015 at 11:41, Ceri Clatworthy <span dir="ltr"><<a href="mailto:ceri.clatworthy@gmail.com" target="_blank">ceri.clatworthy@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Reverse. ..</p>
<p dir="ltr">If ULN 2003...<br>
The wiggle pins in other direction! !!</p><div><div>
<div class="gmail_quote">On 19 Apr 2015 11:23, "Tim Moore" <<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Many thanks Ceri for the tip ! Greatly appreciated !<br><br>: )))<br><br></div>Tim_1<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 19 April 2015 at 11:21, Tim Moore <span dir="ltr"><<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div>Update:-<br><br></div>It may not be very riveting but the change to 6400 (and the deletion of */ at the top of the code worked fine !<br><br></div>the count for <br>90 deg was 500 and time 52.5 secs<br></div>180 deg was 1000 105<br></div>270 deg was 1500 157.5<br></div>360 deg was 2000 210 secs ( 3m 30 secs) approx <br><br></div>(I hope !)<br><br></div>Now this might be very boring, but it also might help a Newbie to stepper motors test their new purchase out too !<br><br></div>Anyone know if the controller board can make it go in reverse ?<br><br>: )))<br><br></div>Tim_1<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On 19 April 2015 at 10:23, Tim Moore <span dir="ltr"><<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I've been trying to get this working on a 28BYJ-48 with ULN2003 cheapest stepper motor set up.<br><br><h1> Created 30 Nov. 2009<br> by Tom Igoe<br> <br> <font size="2">*/<span style="font-weight:normal"><br><br>#include <Stepper.h><br><br>const int stepsPerRevolution = 1440; // change this to fit the number of steps per revolution<br> </span></font><font size="2"><span style="font-weight:normal"> // for your motor<br><br>// initialize the stepper library on pins 8 through 11:<br>Stepper myStepper(stepsPerRevolution, 8,9,10,11); <br><br>int stepCount = 0; // number of steps the motor has taken<br><br>void setup() {<br> // initialize the serial port:<br> Serial.begin(9600);<br>}<br><br>void loop() {<br> // step one step:<br> myStepper.step(1);<br> Serial.print("steps:" );<br> Serial.println(stepCount);<br> stepCount++;<br> delay(100);<br>}</span></font></h1><p><br></p><p>Spec:-</p><p><br></p><ul><li><br></li><li>Voltage : 5V </li><li>Diameter : 28mm </li><li>Step angle : 5.625 x 1 / 64 </li><li>Reduction ratio : 1 / 64 </li><li>5 Line 4 phase </li><li>Current draw : 92mA </li><li>Operating Frequency : 100pps</li><li>Dimensions : 35mm x 28mm </li><li>4 mounting holes </li><li>ULN2003 chip </li><li>A, B, C, D four-phase status LED </li></ul><p>___</p><p><br></p><p>Now the divide by 64 seems to be a stumbling block ?<br></p><p>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.</p><p>A period of anything up to two minutes is fine for the 180 degree rotation.</p><p>So far it twitches a bit but not much else e.g. not very exciting.<br></p><p>Should the <font size="2"><span style="font-weight:normal">s</span></font><font size="2"><span style="font-weight:normal">tepsPerRevolution = 1440 be changed to </span></font><font size="2"><span style="font-weight:normal">stepsPerRevolution = 6400 ?<br></span></font></p><p>Maybe I've got the Arduino pins a tad wrong ?</p><p>: )</p><p><br></p><p>Tim_1<br></p><br><br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On 18 April 2015 at 19:58, Justin Mitchell <span dir="ltr"><<a href="mailto:justin@swansea.hackspace.org.uk" target="_blank">justin@swansea.hackspace.org.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Yes, one motor one step-stick.<br>
<br>
Control it from an arduino, or any other micro, just needs two GPIO<br>
lines.<br>
<div><div><br>
<br>
On Sat, 2015-04-18 at 16:04 +0100, Tim Moore wrote:<br>
> So a single 'step-stick' would do it ?<br>
><br>
><br>
> Many thanks for responding !<br>
><br>
> : )))<br>
><br>
><br>
> Tim_1<br>
><br>
><br>
> On 18 April 2015 at 15:09, Justin Mitchell <<a href="mailto:justin@discordia.org.uk" target="_blank">justin@discordia.org.uk</a>><br>
> wrote:<br>
> It's an interface for all the stuff you need to drive a 3d<br>
> printer, takes 5 step-sticks for stepper driving, has power<br>
> MOSFETs to pwm the hotends and heated bed, and a bunch of<br>
> inputs for end stops and thermistors. You plug it into an<br>
> Arduino mega board, install some software like Marlin and it<br>
> can run your printer, or mixed to control a CNC mill or laser<br>
> cutter.<br>
><br>
> Way over kill for driving one motor :)<br>
><br>
> On 18 Apr 2015 2:51 pm, Tim Moore <<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>><br>
> wrote:<br>
> ><br>
> > Wow ! Loads of interesting links and ideas !<br>
> ><br>
> > Its a very slow rotation, so inertia is not a problem.<br>
> ><br>
> > Is a 'RAMPS 1.4' useful ? what does it do ?<br>
> ><br>
> > Many thanks to all who have responded !<br>
> ><br>
> > : )))<br>
> ><br>
> > Tim_1<br>
> ><br>
> > On 18 April 2015 at 13:57, oliver Oliver<br>
> <<a href="mailto:oliver@oliverjenkins.com" target="_blank">oliver@oliverjenkins.com</a>> wrote:<br>
> >><br>
> >> Think about pulleys or gears. I don't know if you want the<br>
> pole to stop at a particular point or not. Inertia in 1m pole<br>
> will be higher than braking force of a stepper motor. So it<br>
> will continue to spin after you stop the motor. Giving you an<br>
> unpredictable 180 plus rotation.<br>
> >><br>
> >> For a pulley arrangement look at t5 timing belts. you can<br>
> easily print the pulleys using a reprap. There are libraries<br>
> on thingiverse.<br>
> >><br>
> >> A worm gear would be better, but you can't print those.<br>
> >><br>
> >> Oli<br>
> >><br>
> >> On 18 Apr 2015 12:33, "Tim Moore" <<a href="mailto:timmoore47@gmail.com" target="_blank">timmoore47@gmail.com</a>><br>
> wrote:<br>
> >>><br>
> >>> I'm trying to carefully rorate a metre long light weight<br>
> pole through 180 degrees.<br>
> >>><br>
> >>> I've got a Stepper Motor type 28BYJ-48 working fine, but<br>
> I'm sure I need one that is a bit more chunky !<br>
> >>><br>
> >>> I've got a 17HS16-2004S NEMA 17 (42 x 42 mm) high torque<br>
> 1.8 degree stepper motor on the way with a controller card<br>
> >>><br>
> >>> But I've not got a very clear vision yet what else I might<br>
> need and if there is any Arduino example software listing that<br>
> would be good to use to get it to work ?<br>
> >>><br>
> >>> I don't want to reinvent the wheel ! *LOL*<br>
> >>><br>
> >>> Any thoughts anyone ?<br>
> >>><br>
> >>> : )))<br>
> >>><br>
> >>> Tim_1<br>
> >>><br>
> >>> _______________________________________________<br>
> >>> Hackspace mailing list<br>
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