Re: [CAD_CAM_EDM_DRO] stupid stepper question

At 04:52 PM 12/3/2007, you wrote:

>OK I'm showing my ignorance (again). I acquired what look to be some nice
>steppers out of a HD printer - 200 steps per rev, and look to be NEMA 23, 6
>wire, and an ohm meter confirms 4 phases. Dan Mauch was kind enough to
>donate a bipolar chopper board, for our school CNC router project. But I'm
>more than a little confused about this 4 phase motor, which I have driven by
>hand with a unipolar tester, and the bipolar driver board. Are they
>incompatible, or am I missing something? Looks like I need to search for
>bipolar motors, eh?

It may be two phase with two windings per phase which can be series
or parallel connected. Usually these can be connected as a unipolar
or bipolar motor.


David G. LeVine
Nashua, NH 03060