4. STARTUP
4 - 13
No. Start-up sequence Fault Investigation Possible cause Reference
Rotation ripples (speed
fluctuations) are large
at low speed.
Make gain adjustment in the
following procedure.
1. Increase the auto tuning
response level.
2. Repeat acceleration and
deceleration several times to
complete auto tuning.
Gain adjustment fault Chapter 6
4 Gain adjustment
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
If the servo motor may be run
with safety, repeat acceleration
and deceleration several times to
complete auto tuning.
Gain adjustment fault Chapter 6
Note. Only a list of alarms and warnings is listed in chapter 8. Refer to "MELSERVO-J4 Servo Amplifier Instruction Manual
(Troubleshooting)" for details of alarms and warnings.