Yaskawa Sigma Mini - Manual (Page 234)

INSPECTION AND MAINTENANCE
5.2.2 Troubleshooting Problems With No Alarm Display
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Symptom Remedy Inspection Cause
Servomotor overheated Ambient temperature too
high
Measure Servomotor
ambient temperature.
Reduce ambient
temperature to 40°C max.
Servomotor surface dirty Visual check Clean dust and oil from
motor surface.
Overloaded Run under no load. Reduce load or replace with
larger capacity Servomotor.
Abnormal noise Mechanical mounting
incorrect
Servomotor mounting
screws loose?
Tighten mounting screws.
co ect
Coupling not centered? Center coupling.
Coupling unbalanced? Balance coupling.
Bearing defective Check noise and vibration
near bearing.
Consult your Yaskawa
representative if defective.
Machine causing vibrations Foreign object intrusion,
damage or deformation of
sliding parts of machine.
Consult with machine
manufacturer.
Speed reference 0 V but
Servomotor rotates.
Speed reference voltage
offset applied
--- Refer to 3.2.4 Reference
Offset Automatic Adjustment
Mode and 3.2.5 Reference
Offset Manual Adjustment
Mode and adjust reference
offset.
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