Inspection Items; Parts Having Service Lives - Mitsubishi Electric Melservo HF-KN Series Instruction Manual

2. INSTALLATION

2.7 Inspection items

WARNING
CAUTION
It is recommended that the following points periodically be checked.
(1) Check the bearings, brake section, etc. for unusual noise.
(2) Check the cables and the like for scratches or cracks. Especially when the cable is movable, perform
periodic inspections according to operating conditions.
(3) Check the servo motor shaft and coupling for misalignment.
(4) Check the power supply connector and encoder connector tightening screws for looseness.

2.8 Parts having service lives

Service lives of the following parts are listed below. However, the service life vary depending or operating
methods and environment. If any fault is found in the parts, they must be replaced immediately regardless of
their service lives. For parts replacement, please contact your local sales office.
(1) Bearings
When the motor is run at rated speed under rated load, bearings should be exchanged 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.
(2) Oil seal
Oil seals must be changed in 5,000 hours of operation at rated speed as a guideline. They must also be
changed if oil leakage, etc. is found during inspection.
The functions have no problem even if an oil seal may sound during operation.
Before starting maintenance and/or inspection, turn off the power and wait for 15
minutes or more until the charge lamp turns off. Otherwise, an electric shock may
occur. In addition, when confirming whether the charge lamp is off or not, always
confirm it from the front of the servo amplifier.
To avoid an electric shock, only qualified personnel should attempt inspections.
For repair and parts replacement, contact your local sales office.
Do not disassemble and/or repair the equipment on customer side.
Part name
Bearings
Encoder
Oil seal
Life guideline
20,000 hours to
30,000 hours
20,000 hours to
30,000 hours
5000 hours
2 - 6