Re: [CAD_CAM_EDM_DRO] 90v DC motor as servo?

Chris Stratton wrote:

> Les,
>
> Thanks for the info. Obviously, one is not going to build a high
> speed servo system with 90v DC motors. I do wonder however if a
> surplus motor of this type plus a G320/340 could be used to build a
> cheap system with stepper-level performance.
>
> I believe the SCR motor develops its rated power at 1750 RPM as
> opposed to maybe 6000 for the servo. This would mean a lower
> reduction ratio - possibly direct drive, which would reduce the
> effective rotor inertia, right? (well really, the rotor wouldn't have
> to be accelerated to as high a speed)

You should know that any servo system needs an encoder to measure
position. Some servo amps require a DC tach, too, although the Gecko
servo drives don't.

Jon