Subject:
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Bipolar Stepper Motors
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 1 Mar 1999 21:41:57 GMT
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Original-From:
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Carlos Fernandez <softech@ptdprolog*stopspam*.net>
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Viewed:
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938 times
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Hi, everyone. I was wondering if somebody could help me.
I am trying to control a 2 phase bipolar stepper motor.
I found a web page at :
http://laguna.fmedic.unam.mx/~daniel/handy_bipolar.html
that talks about controlling bipolar stepper motors. But I just can't seem
to make it work.
When I use the code from the page the motors just vibrates, move forward,
backward and stop.
The stepper motors have four wires. Brown +A, Red -A, Blue +B, Yellow -B.
I connect them on the HB motor header: Brown, Skip,Red,Blue,Skip,Yellow
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.I wrote a small program trying to interpret this:
void Stepper(void);
int intSteps=30;
int intStep;
long 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.
If anybody could help me, I would really appreciate it.
Thanks
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Message has 1 Reply:
 | | Re: Bipolar Stepper Motors
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| First thing take an ohm meter and "read" your coils. From any wire you should have one other wire at a low resistance and two at a high resistance. This will first determine if you have it wired right. On my steppers the outside two form one coil (...) (26 years ago, 1-Mar-99, to lugnet.robotics.handyboard)
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