Inspection Items; Periodic Inspection; Parts With A Service Life - Mitsubishi Electric MELSERVO-J5 HK Series User Manual

2.7

Inspection items

• To prevent a malfunction, do not perform an insulation resistance test (megger test) on the rotary servo motor.
• Customers must not disassemble and/or repair the equipment.

Periodic inspection

Perform the following inspections.
• Check the bearings, brake section, and the like for unusual noise.
• Check the cables and the like for scratches or cracks. Inspect them periodically according to operating conditions
especially when the cables are movable.
• Check the rotary servo motor shaft and coupling for misalignment.
• Check the power connector and encoder connector tightening screws for looseness.
2.8

Parts with a service life

The service life of the following parts is listed below. If any fault is found in a part, replace it immediately because its service
life varies. For parts replacement, please contact your local sales office.
Part name
Bearings
Encoder
Oil seal
Gear reducer
Bearings
When the motor is run at rated speed and at rated load, bearings should be changed every 20000 to 30000 hours as a
guideline. As this differs depending on the operating conditions, the bearings must also be changed if unusual noise or
vibration occurs during inspection.
Oil seal
Oil seals must be changed in 5000 hours of operation at rated speed as a guideline. This differs depending on the operating
conditions. The oil seals must also be changed if oil leakage a similar problem is found during inspection.
Even if the oil seal on the rotary servo motor makes noises during operation, it does not indicate a problem with the functions.
Recommended service life
20000 hours to 30000 hours
20000 hours to 30000 hours
5000 hours
10000 hours to 20000 hours
2 INSTALLATION
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2.7 Inspection items
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