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9. INSPECTION
(c) Servo amplifier cooling fan
The cooling fan bearings reach the end of their life in 10,000 to 30,000 hours. Normally, therefore, the
cooling fan must be changed in a few years of continuous operation as a guideline.
It must also be changed if unusual noise or vibration is found during inspection.
(d) Bearings
When the servo motor is run at rated speed under rated load, change the bearings in 20,000 to 30,000
hours as a guideline. This differs on the operating conditions. The bearings must also be changed if
unusual noise or vibration is found during inspection.
(e) Oil seal, V ring
Must be changed in 5,000 hours of operation at rated speed as a guideline. This differs on the operating
conditions. These parts must also be changed if oil leakage, etc. is found during inspection.
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