Re: Increased power to Gecko 201's

Howdy..

With capacitor doubling (normal), my 48vac 2kva transformer makes
68vdc. With hard decelleration it can run over the 80 volts, the
motors actually pump up voltage like a generator while inertia is
dumped by slowing. My slide on my machine weighs over 200 pounds, your
results may vary. My transformer is a 220to24/24 dual tap transformer
with the x-leads in series. Them are kinda rare so they tell me. I had
to pay list price of $200.

Mariss of gecko posted a voltage dump circuit a while back.

David

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Ron K <godsone@e...> wrote:
> Thanks for your answers .
> I found another transformer that gave me 50 volts instead of the 38
> volts and it has made a noticeable difference in the speed and
> acceleration of the mill .
> Oh yes , the higher voltage did not make any difference in the motor
> temperature and I'm still running the Geckos wide open ( no current
set
> resistor )
> PS. I'm a little worried about trying the 70 volt transformer it is
> awfully close to the 80 volt self destruct point .
>
> --
> Ron Kline
>
> American Precision Ceramics
>
>
>
> >>Hi All
> >>I have a question for the electronic minded in the group , I have a
> >>Bridgeport clone about 20 years old it has 3.1 Volt 6.2 amp 1100
> >>
> >>
> >oz.
> >
> >
> >>steppers on it and I'm running it with 3 Gecko 201's at 38 Volts (
> >>
> >>
> >full
> >
> >
> >>load ), I just acquired a transformer that will give me 70 Volts
> >>
> >>
> >dc. ( a
> >
> >
> >>little higher than I hoped for )
> >>What kind of increase in speed and or torque would this give me.
> >>
> >>Thanks
> >>Ron
> >>
> >>
> >
> >
> >
>
> --
> Ron Kline
>
> American Precision Ceramics
>
>
>
> [Non-text portions of this message have been removed]