Re: [CAD_CAM_EDM_DRO] Re: Motors

on 2002-07-12 11:04:24 UTC

I don't know the difference, is an 8 wire motor unipolar?

the_dutros wrote:

>
> --- In CAD_CAM_EDM_DRO@y..., Gene <capper@i...> wrote:
> > I'm going to replace my steppers with 4.5 amp, 2 volt, 8 wire
> motors.
> > I'm Going to wire them in parallel( if that's the best way?} I
> > calculate 20k 1/4 watt resistors for the 201 geckos power output. My
> > power supply is 62 volts. Is this correct ? if the volts are too
> high
> > how would I lower them?
>
> I'm just curious -- did you happen to have the motors, are they the
> only ones you could find, or are you actually going to buy them?
>
> I keep reading about people buying UNIPOLAR motors to be driven by
> circuits that are (essentially) designed for BIPOLAR motors. Why do
> you do this if you have a choice when a BIPOLAR motor with similar
> specifications will perform significantly better?
>
> To answer your question, there are several sites listed in previous
> posts that describe in great detail how to determine the correct
> voltage, and stepper sizing. I believe the "rule of thumb" is not to
> exceed 25 times the rated voltage. You can use more, but it won't
> gain you any additional performance, just heat.
>
> -DASH
>
> Addresses:
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> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
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