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9. INSPECTION
9. 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. 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 test the servo amplifier with a megger (measure insulation resistance),
or it may become faulty.
Do not disassemble and/or repair the equipment on customer side.
(1) Inspection
It is recommended to make the following checks periodically.
(a) Check for loose terminal block screws. Retighten any loose screws.
(b) Check the cables and the like for scratches and cracks. Perform periodic inspection according to
operating conditions.
(c) Check the servo motor bearings, brake section, etc. for unusual noise.
(d) Check the cables and the like for scratches and cracks. Perform periodic inspection according to
operating conditions.
(e) Check the servo motor shaft and coupling for misalignment.
(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
Life guideline
Smoothing capacitor
10 years
Relay
Number of power-on and number of
emergency stop times: 100,000 times
Bearings
20,000 to 30,000 hours
Encoder
20,000 to 30,000 hours
Oil seal
5,000 hours
(a) Smoothing capacitor
Affected by ripple currents, etc. and deteriorates in characteristic. The life of the capacitor greatly
depends on ambient temperature and operating conditions. The capacitor will reach the end of its life in
10 years of continuous operation in normal air-conditioned environment.
(b) Relays
Their contacts will wear due to switching currents and contact faults occur. Relays reach the end of their
life when the cumulative number of power-on and emergency stop times is 100,000, which depends on
the power supply capacity.
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