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2. INSTALLATION
2.8 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 inspection 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.
2.9 Parts having service life
Service life of the following parts are listed below. However, the service life varies depending on operation
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 servo 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.
Before starting maintenance and/or inspection, turn off the power and wait for 15
minutes or more (20 minutes or more for converter unit and drive unit) until the
charge lamp turns off. Then, confirm that the voltage between P+ and N- (L+ and
L- for converter unit and drive unit) is safe with a voltage tester and others.
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
(converter unit).
To avoid an electric shock, only qualified personnel should attempt inspections.
For repair and parts replacement, contact your local sales office.
Do not perform insulation resistance test on the servo motor. Otherwise, it may
cause a malfunction.
Do not disassemble and/or repair the equipment on customer side.
Part name
Bearings
Encoder
Cooling fan
Oil seal
Reducer
Life guideline
20,000 hours to
30,000 hours
20,000 hours to
30,000 hours
20,000 hours
5000 hours
10,000 hours to
20,000 hours
2 - 6
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