Omron OMNUC G5 R88M-K series User Manual page 424

11-4 Troubleshooting
Symptom
The motor is overheating. The ambient temperature is
The machine position is
misaligned.
The motor does not stop
or is hard to stop even if
the operation command
(RUN) is turned OFF
while the motor is rotating.
11
11-31
Probable cause
too high.
The heat radiation condition
for the motor is
inappropriate.
The motor is overloaded.
The motor vibrates during
rotation.
The coupling of the
servomotor axis and the
machine is abnormal.
The host controller gives a
deceleration stop command.
The load inertia is too large.
The dynamic brake is
disabled.
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
Items to check
Check the ambient
temperature around the motor
is not over 40C.
• Check that the specified
radiation condition is
observed.
• Check the load ratio for the
servomotor with brake.
Measure the torque on the
analog monitor on the front
panel or by the CX-Drive.
Check that the coupling of the
servomotor and the machine
is not misaligned.
Check the control ladder on
the host controller.
• Check the load inertia.
• Check the motor rotation
speed.
• The dynamic brake
resistance is disconnected.
Check if the dynamic brake is
not disabled or broken.
Measures
• Lower the ambient
temperature around
the motor to 40C or
less. (Use a fan or air
conditioner.)
• Lower the load rate.
• Improve the radiation
condition.
• Reduce the load.
• Improve ventilation.
• Decrease the
acceleration and
deceleration speed.
• Lower the speed and
check the load.
• Tighten the coupling
again.
• Replace with a coupling
which has no
looseness.
Review the control on the
host controller.
• Review the load inertia.
• Replace the motor and
drive with appropriate
ones.
• Enable, if it is disabled.
• Replace the brake with
a new one, if it is
broken or resistor
disconnection is
detected.