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Symptom
Probable cause
The Servomotor
The ambient temperature
is overheating.
is too high.
Ventilation is obstructed.
The Servomotor is
overloaded.
The Servomotor is rotating
with vibration.
The holding
Power is supplied to the
brake is ineffec-
holding brake.
tive.
The Servomotor
The load inertia is too
doesn't stop or is
large.
hard to stop even
if the RUN
Command Input
(RUN) is turned
The stop circuit failed.
OFF while the
Servomotor is ro-
tating.
Items to check
Check that the ambient tempera-
ture around the Servomotor is be-
low 40°C.
Check to see whether anything is
blocking ventilation.
Try rotating the Servomotor without
a load. (Disconnect it from the me-
chanical system.)
Check whether power is supplied to
the holding brake.
Check the following:
• Is the load too large?
• Is the Servomotor speed too
high?
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8-3 Troubleshooting
Countermeasures
Lower the ambient tempera-
ture to 40°C or less. (Use a
cooler or fan.)
Improve ventilation.
• Reduce the load.
• Replace the Servomotor
and Servo Drive with a Ser-
vomotor and Servo Drive
with higher capacities.
Configure a circuit that cuts
power to the holding brake
when the motor stops and
the load is held by the hold-
ing brake.
Re-evaluate the load condi-
tions and replace the Servo-
motor/Servo Drive with an
appropriate model if neces-
sary.
Replace the Servo Drive.
8-14
8
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Chapters
Troubleshooting
