Maintenance And Service - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Maintenance and service

WARNING
• To avoid an electric shock, only qualified personnel should attempt inspections. For repair and parts replacement, contact your local sales office.
Inspection items
It is recommended that the following points periodically be checked.
• Check for loose terminal block screws. Retighten any loose screws. (Except for MR-J4-03A6 and MR-J4W2-0303B6)
Servo amplifier Tightening torque [N•m]
L1

MR-J4-10_(1)/MR-J4-20_(1)/
MR-J4-40_(1)/MR-J4-60_(4)/
MR-J4-70_/MR-J4-100_(4)/
MR-J4-200_(4)/MR-J4-
350_(4)
MR-J4-500_ 1.2
MR-J4-700_(4)/MR-J4-500_4 1.2
MR-J4-11K_(4)/MR-J4- 3.0
15K_(4)
MR-J4-22K_(4) 6.0

MR-J4W_-_B
• Servo motor bearings, brake section, etc. for unusual noise.
• Check the cables and the like for scratches or cracks. Perform periodic inspection according to operating conditions.
• Check that the connectors are securely connected to the servo motor.
• Check that the wires are not coming out from the connector.
• Check for dust accumulation on the servo amplifier.
• Check for unusual noise generated from the servo amplifier.
• Check the servo motor shaft and coupling for connection.
• Make sure that the emergency stop circuit operates properly such that an operation can be stopped immediately and a
power is shut off by the emergency stop switch.
Parts having service life
Service life of the following parts is 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 life. For parts replacement,
please contact your local sales office.
Part name
Smoothing capacitor
Relay
Cooling fan
*1
Battery backup time
*2
Battery life
*1 The time is for using MR-J4 1-axis servo amplifier with a rotary servo motor using MR-BAT6V1SET, MR-BAT6V1SET-A, or MR-
BAT6V1BJ. For details and other battery backup time, refer to the following.
Page 447 ABSOLUTE POSITION DETECTION SYSTEM
*2 Quality of the batteries degrades by the storage condition. The battery life is 5 years from the production date regardless of the
connection status.
*3 The characteristic of smoothing capacitor is deteriorated due to ripple currents, etc. The life of the capacitor greatly depends on ambient
temperature and operating conditions. The capacitor will be the end of its life in 10 years of continuous operation in air-conditioned
environment (ambient temperature of 40  or less for use at the maximum 1000 m above sea level, 30  or less for over 1000 m to
2000 m).
L2 L3 N- P3 P4 P+ C D L11
0.8

0.8
 1.2

1.2
Life guideline
*3
10 years
Number of power-on, forced stop and controller forced stop times: 100 000 times
Number of on and off for STO: 1,000,000 times
10,000 hours to 30,000 hours (2 years to 3 years)
Approximately 20,000 hours (equipment power supply: off, ambient
temperature: 20 )
5 years from date of manufacture
Appendix 4 Compliance with global standards
L21 U V W PE
1.2
1.2
1.2
3.0
6.0
1.2
APPX
A
581