Mitsubishi Electric Melservo-J2-JR SERIES Instruction Manual page 126

9. 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 Make gain adjustment in the
moment causes the following procedure:
servo motor shaft to If the servo motor may be
oscillate side to side. run with safety, repeat
acceleration and
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.
9 - 2
Possible Cause
(2) in this
section
Refer To
Chapter 7
Chapter 7