Sherline driver voltage was Re: Electrical wizards

Alan,

Are you talking chopper drive? L/R? "Appropriate" as in 60 oz.in. or
125? Or 5v,1a vs. 3v,2a(and several others)?

Because in all these cases ,there is a large speed difference between
18 and 34volts, empirically determined. L297/298 chopper, and 5804
unipolar. Back EMF itself will re-shape the torque curve, and when
the mill is operating so "close" to the abilities of the stepper
power available, that change in the torque curve translates
into "meaningful" pretty quickly, IMO.

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., Alan Rothenbush <beer@s...> wrote:
> For example, in a Sherline sized unit, with appropriately sized
> steppers, I doubt that there is much meaningful difference between
> 18 volts and 36 volts.
>
> Alan
>