RE: [CAD_CAM_EDM_DRO] Re: CMD-260 test mode?

Try all 3 methods and see what you like. AT 25X or above the motors are
going to get REAL hot regardless of the current. At full 8 amp current
the drives are going to get real hot regardless of the voltage. Half
coil at a moderate over voltage (say 15 X or so) will keep both the
motor and the drives from running real hot. We all have the way we like
to do things and now you need to figure out what you like for yourself.

Tim
[Denver, CO]
Sherline products at Deep Discount
Mach1 & DeskCNC with credit card ordering
www.KTMarketing.com/Sherline
Now selling Visual Mill

> -----Original Message-----
> Thanks for getting back to me. My concern is that I've tentatively
> identified the NEMA 42's as having a nominal voltage of 2.1
> volts and a current rating of 9 amps. According to the white
> paper on Gecko's site, they recommend that the voltage be
> kept to less than 25 times nominal to prevent motor
> overheating. I figured the 28 volts I was going to use was
> 10 times nominal rating and I'd pump up the amps to the drive
> limit (8 amps).
>
> Half of the advice I've gotten off the chat group has told me
> to run the voltage low and use half winding and keep the
> current low. Half the advice is to run balls out on both
> voltage and current. A third half is telling me to raise the
> voltage above the advice Gecko (I'm using CMD-260, from a
> Gecko competitor, but I assumed the advice was generic) is
> giving and run the current low.
>
> I've rebuilt the power supply three times in the past week
> and I'm all confused.
>
> Jeff