Re: Non-chopper unipolar v. chopper bipolar

Hi JJ,

I would think that it might be fair to say that most of us have
switched.

Check out jones on steppers
http://www.cs.uiowa.edu/~jones/step/

and Marriss's site www.geckodrives.com for his white paper on
steppers.

I don't have any experiance between the two. I went from a unipolar
5 volt motor at 12 volts to running it at just shy of 40 volts in bi-
polar mode with a Gecko. it was WAY quietier, but since I didn't try
to do any work in unipolar mode, I have no basis for comparison.

Dave

--- In CAD_CAM_EDM_DRO@y..., "JJ" <jj5412@e...> wrote:
> Has anyone switched their unipolar six lead motors from a simple
> transistor to ground type drive circuit to a chopper (L297/L298)
driving
> half the windings as bipolar? I'd love to hear the performance
gain, if
> any, and any other ramifications.
>
> Thanks,
> JJ
>
> Be Kind, Be Careful, Be Yourself