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4. INSPECTION
4. INSPECTION
WARNING
Before starting maintenance and/or inspection, turn off the power and wait for 15
minutes or more until the charge lamp turns off. Then, confirm that the voltage
between P and N is safe with a voltage tester and others. Otherwise, an electric
shock may occur. In addition, always confirm from the front of the servo amplifier
whether the charge lamp is off or not.
Any person who is involved in inspection should be fully competent to do the work.
Otherwise, you may get an electric shock. For repair and parts replacement,
contact your safes representative.
POINT
Do not disassemble and/or repair the equipment on customer side.
(1) Inspection
It is recommended to make the following checks periodically.
(a) Check the servo motor bearings, brake section, etc. for unusual noise.
(b) Check the cables and the like for scratches and cracks. Especially when the junction cable is
movable, perform periodic inspection according to operating conditions.
(c) Check the servo motor shaft and coupling for misalignment.
(d) Check the power supply connector and encoder connector tightening screws for looseness.
(2) Life
The following parts must be changed periodically as listed below. If any part is found faulty, it must be
changed immediately even when it has not yet reached the end of its life, which depends on the
operating method and environmental conditions. For parts replacement, please contact your sales
representative.
Part Name Guideline of Life Remarks
Bearings 20,000 to 30,000 hours
Encoder 20,000 to 30,000 hours
Oil seal 5,000 hours
Cooling fan 20,000 hours
The Guideline of Life field gives the reference time. If any fault
is found before this time is reached, the part must be changed.
(a) 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.
(b) Oil seal
Must be changed in 5,000 hours of operation at rated speed as a guideline. These parts must also
be changed if oil leakage, etc. is found during inspection.