Re: Wanted: Servo Motors that interface to Gecko 320-Ron

Hi Ron,
I'm just wondering if you are using a "dump" circuit to drain off
the back voltage when slowing the motors rapidly? I'll be using a
75VDC supply and after what you say about the 118VDC breakup point,
would a dump be absolutely necessary?

John

--- In CAD_CAM_EDM_DRO@yahoogroups.com, R Rogers <rogersmach@y...>
wrote:

> I'm running 40in-lb servos on Gecko 320's. They are 100 volt (40

volts per K of rpm X 2500 rpm= 100 volts) 13.7 amps continuous.
Running them at 70 volts DC to stay within the voltage rating of the
drive. Sacrificing speed but not any torque. Still get rapids of 120
ipm on the Bridgeport. These actually exceed the Geckos capability
but work reliably. So, anything equal to or less than these NEMA 42
motors will work with a Gecko 320. When I described these motors to
Marriss at Geckodrive he replied that those are the same size motors
that they test the 320 on. Except at full voltage. He also stated in
another post recently that the 320 actually comes apart at 118 volts
and 30 amps which is just amazing. Thats enough current in AC to
power a small home. 29 in-lb or 2.9 Nm motors are very common and
would be good for any X and Y axis for any mill. Most of the
retrofitters use these for X and Y axis.

>
> Ron
>
> Joel <chopper_joel@y...> wrote:
>
>