Re: [CAD_CAM_EDM_DRO] Re: Synchronous vs stepper

Hi,

Whoops, looks like I got the wrong end of the stick in my earlier post.
Perhaps someone could explain what I should have been writing about?

Regards,

Terry

> Hi, A 200 step motor (1.8 deg) can be run directly from a 50 or 60 Hz
> supply. What is needed is a capacitor in series with one winding to
> phase shift the AC 90 deg relative to the other winding. At 50 Hz
> this gives 60 RPM and at 60 Hz it gives 72 RPM. Step motors intended
> for 115 VAC operation have a high inductance to limit phase current
> to the correct value at 50 / 60 Hz.
>
> Mariss
>
> --- In CAD_CAM_EDM_DRO@egroups.com, Multi-Volti Devices <multi-
> volti@s...> wrote:
> > I believe the synchronous variety also has a capacitor wired
> internally, so it doesn't need a stepper drive; it runs right off 120
> vac
> > 60 Hz (for a 60 Hz model?)
> >
> > Murray