Newsgroups: comp.robotics
Path: brunix!uunet!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!pkdutta
From: pkdutta@magnus.acs.ohio-state.edu (Prabal K Dutta)
Subject: Re: Stepper motors
Message-ID: <1993Apr1.181351.18276@magnus.acs.ohio-state.edu>
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Date: Thu, 1 Apr 1993 18:13:51 GMT
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In article <1pdah8INNqdc@dns1.NMSU.Edu> mcole@scotty (COLE) writes:
>I am having trouble driving a stepper motor.  I am driving each of the
>phases with an IRF510 FET.  At around 1KHz the motor just sits there and
>hums.  Any suggestions?

     Could be that you're trying to drive them too FAST. I have found that many
stepper motors tend not to operate well when you drive them significantly 
faster then 500 pulses per second. The motors I used were rated for 500 
steps/sec. When you have 1.8 degrees/step, the motor doesn't go fast.
     If on the other hand you stepper runs smoothly for f << 1kHz and f >> 1kHz
then I have no idea. Make sure your stepper is designed to be driven those 
speeds.

     - Prabal

pkdutta@magnus.acs.ohio-state.edu
