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

Even at 25X voltage the motor will run real hot. If you look at the
idealized chart Mariss has on motor heating you will see that at about
12X over voltage the iron loss heating (voltage dependent) is equal to
the copper loss heating (amperage dependent). At 25X the iron heating is
about 2-1/2 times the copper heating. You will also note that the slope
of the curve gets steeper with increasing voltage. 56.5 will push you
further up the curve than is plotted.

Now it is your choice. Pushing too hard will only cost you some motors
and drives so try what ever you like and give us a report on the
results.

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

> -----Original Message-----
>
>
> I believe NEMA 42's have a nominal voltage of 2.1 volts.
> I've been warned that if I exceed 25 times the voltage, the
> motors run too hot. They're rated 9 amps so the 8 amp limit
> of the drive shouldn't present a problem.
>
> I can rig my other power supply for either 56.5, 62 or 67.6 volts.
>
> Any further advise would be appreciated.
>
> Regards,
> Jeff