Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual page 195

10. TROUBLESHOOTING
No. Start-up sequence
4 Gain adjustment
5 Cyclic operation
Fault
Rotation ripples Make gain adjustment in the
(speed fluctuations) following procedure:
are large at low 1. Increase the auto tuning
speed. response level.
2. Repeat acceleration and
deceleration several times
to complete auto tuning.
Large load inertia If the servo motor may be
moment causes the run with safety, repeat
servo motor shaft to acceleration and
oscillate side to side. deceleration several times to
complete auto tuning.
Position shift occurs Confirm the cumulative
command pulses, cumulative
feedback pulses and actual
servo motor position.
Investigation
Gain adjustment fault
Gain adjustment fault
Pulse counting error, etc.
due to noise.
10 - 2
Possible cause Reference
Chapter 7
Chapter 7
(2) in this
section