Re: [CAD_CAM_EDM_DRO] RE:Re: Darrell and Mariss: BP 42 motor volts and ???

The reactor bias is controlled by the ACC card. There are
three identical circuits on one card. One circuit for each
axis. There is one trim pot for each axis. It sets the axis
current to 8 amps. If the machine is powered up and the
limit over ride button has been pushed, each properly
adjusted axis will draw 8 amps as long as you want to let
the machine set there. The motors will get only slightly
warm. They will run for years that way.
Darrell

----- Original Message -----
From: "Jon Elson" <jmelson@...>

> Not quite sure what you are saying, here. The idle
current is supposed
> to be reduced, but certainly not to zero. If the circuit
that turns off
> the
> reactor bias fails, then the reactor gets bias current all
the time and
> the
> drive runs at full voltage all the time, either burning up
the motor or
> frying transistors. The reactor bias circuit was what I
was trying to
> help somebody debug through the net.
>
> Jon
>