16 years ago
I've got a Hitachi Seiki 3NE which has developed a motor alarm and put
the machine into an EStop condition. This is an alarm LED on the
operator's panel the next to the lube & shear pin alarms, not on the NC
control. No alarm there.
We always thought this was a motor overheat alarm and we were wondering
if anything else could cause it. The motor seems good and the motor
repair guy I talked to suggested it could be the thermister in the
motor has gone bad.
How would I check the thermister and what kind of values would I be
looking for? Couldn't I fool the control by bridging in a good