Re: [CAD_CAM_EDM_DRO] Setting Gecko current

JanRwl@... wrote:

>
> I have seen ratings of "105°C". That's a little hotter than boiling water,
> and something dry (motor) could be "TOUCHED" without harm, so long as you
> didn't HOLD your pinkies there for more than a couple seconds. But that is a
> "RATING", not necessarily how hot the motor should actually GET in use.

Note that these temperature ratings, which need to be placed on the motor
for regulatory compliance, are max. insulation temperature, NOT motor case
temperature. If the outside of the motor reached 105 C, the inside would have
to be even hotter. It isn't too unusual to see stepper motors reaching 70 C
case temp. under severe conditions (nearly continuous motion). Some
R/L drivers caused the motors to run this hot when sitting still, but chopper
type drivers usually reduce motor heating a bit at idle, and they warm up a
bit more when running.

Jon