Subject:
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Re: Stepper Motors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 3 Mar 1999 14:22:09 GMT
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Original-From:
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Carlos Fernandez <softech@ptdprolog.net=NoSpam=>
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Viewed:
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3172 times
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I purchase the motors from Jameco.
I connected the stepper motors on the motor headers.
From left to right ( left meaning next to the RJ jack ) in this sequence:
Brown, Skip,Red,Blue,Skip,Yellow.
What do you mean by the pattern in the LED's ?
-----Original Message-----
From: Daniel Kornhauser (Comp) <daniel@laguna.fmedic.unam.mx>
To: Carlos Fernandez <softech@ptdprolog.net>
Date: Tuesday, March 02, 1999 8:54 AM
Subject: Re: Stepper Motors
>
>
> On Mon, 1 Mar 1999, Carlos Fernandez wrote:
>
> > Hi, am just getting started with the Handy Board. I was wondering if you
> > could help me. I am trying to control some stepper motors. The steppers
> > are 2 phase bipolar stepper motors. I connected them just like you said • in
>
> Where did you get your motors from ????
>
> > your page, but when I tell them to move they don't. They move forward • and
> > backward and tremble then stop.
>
> This could be caused by :
>
> 1 Incorect wiring
> 2 You trying to move them to fast...
>
>
> >
> > This stepper motors have four wires. Brown +A, Red -A, Blue +B, • Yellow -B.
>
> This aren't exactly my colors :-(.
> I think The A means that the Brown and Red are in the same coil ??
>
> >
> > I connect them :
> > Brown, Skip,Red,Blue,Skip,Yellow.
>
> In what pins do you conect them ???
>
> >
> > With the stepper motors I received a paper that says:
> >
> > Step +A +B -A -B
> >
> > 1 + + - -
> > 2 - + + -
> > 3 - - + +
> > 4 + - - +
> > 5 + + - -
> >
> > I was not sure how to read this, but hey whats the worst that could
> > happened.
>
> Well it seems clear that A+ And A- are in a same coil because they are
> allways in oposite potencials...
> Did you check that the patern you generate with the leds in you handy
> board ???
>
> > I wrote a small program trying to interpret this:
> >
> > void Stepper(void);
> > int intSteps=30;
> > int intStep;
> > lng lngDelay = 5L;
> > for (intStep = 0; intStep < intSteps; intStep++) {
> > /* step 1 */
> > fd(0);
> > fd(1);
> > msleep(lngDelay);
> > /* step 2 */
> > fd(1);
> > bk(0);
> > msleep(lngDelay);
> > /* step 3 */
> > bk(0);
> > bk(1);
> > msleep(lngDelay);
> > /* step 4 */
> > fd(0);
> > bk(1);
> > msleep(lngDelay);
> > /* step 5 */
> > fd(0);
> > fd(1);
> > }
> > ao();
> > }
> >
> > The program does not work. The stepper motor does the same thing, it
> > varibrates, moves forward a little, moves back a little and stops.
>
> Sorry I don't remember what patern does fd and bk generate in the output
> of the handy board.
> But with the information you have on you motor the job does not appear
> dificult, you just have to try bk(0), bk(1), fd(0) and fd(1) and see what
> patern they generate and mach it with the specification you gave me above.
> Notest that steps 1 and 5 are the same, so you should have a 4 diferent
> paterns, the same that generates bk and fd....
>
> >
> > If you could give me any help I would really appreciate it.
>
> Hope I could help, you job seem fairly easy, you just have to try to find
> the solution a little more. And try to find an other motor to play with
> there is plenty of broken floppys. Sometimes the step motor can just be
> broken....
>
> >
> > Thanks
> De nada....
>
>
> Daniel Korhauser
>
>
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