Re: Power supply for Servos - Energy dump and such - UR...

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Polaraligned"
<polaraligned@o...> wrote:

>
>
> >
> > I thought the electronic circuit also drains the cap when the AC
> > power if off.
> >
> > Dave
>
> The PDF file for this circuit clearly says that it "Rapidly

discharges

> the main filter capacitor when AC power is removed from the supply".
> That is the reason I did not understand you using both the relay
> circuit and the electronic circuit. A stop switch that locks in the
> "open"
> position seems to be all you need with this circuit.
>
>
> Scott

I assume you figured out the two seperate uses of the electronic
circuit.

1) short to ground any high voltages that come back from motors that
are being decelerated rapidly.

2) drain the power when the AC if switched off and E-stop


There relay circuit is only for #2.

Dave