Inspection - Mitsubishi melservo-j2 series Instruction Manual

10. INSPECTION

10. INSPECTION
WARNING
(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.
(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
Smoothing capacitor
Relay
Cooling fan
Absolute position battery
(a) Smoothing capacitor
(b) Relays
(c) Servo amplifier cooling fan : The cooling fan bearings reach the end of their life in 10,000 to 30,000
• Before starting maintenance and/or inspection, make sure that the charge lamp is
off more than 10 minutes after power-off. Then, confirm that the voltage is safe in
the tester or the like. Otherwise, you may get an electric shock.
• 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.
Life Guideline
100,000 times
10,000 to 30,000
hours (2 to 3 years)
Refer to Section 4.5
: 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.
: Their contacts will wear due to switching currents and contact faults
occur. Relays reach the end of their life at cumulative 100,000
switching times (switching life), which depends on the power supply
capacity.
hours. Normally, therefore, the fan must be changed in a few years of
continuous operation as a guideline.
It must also be changed if unusual noise or vibration is found during
inspection.
10 years
10 - 1