Re: [CAD_CAM_EDM_DRO] steppers

Steve Blackmore wrote:

> On Wed, 10 Jul 2002 12:10:39 -0500, you wrote:
>
> >Gene wrote:
> >
> >> Can a 2 phase, 8 wire stepper be hooked up to gecko 201? If so what do
> >> you do with the extra 2 wires?
> >
> >Generally, there would be 4 wires extra. You can either connect up
> >only one winding of each motor phase, or connect the two windings
> >of each phase in parallel.
>
> Or in series, depends on application..

The series connection has minute advantage over the parallel in holding torque
at standstill, but suffers vastly in speed. The series connection has 4 x the
inductance of a single winding, and the parallel has 1/4th the inductance of
single, so you end up with 1/16th the inductance in parallel, thereby allowing
the motor to run 16 times faster in parallel.

(At least, it seems like it should work that way as separate coils on the same
magnetic components.)

Jon