Mitsubishi Electric MELSERVO-J4 Instruction Manual page 233

6. HOW TO USE INDEXER
No. Start-up sequence
4 Switch on ST1 Servo motor does not
(Forward rotation rotate.
start).
5 Gain adjustment Rotation ripples (speed
fluctuations) are large
at low speed.
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
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.
Fault Investigation
Call the external I/O signal
display (section 3.7) and check
the on/off status of the input
signal.
Check [Pr. PA11 Forward rotation
torque limit] and [Pr. PA12
Reverse rotation torque limit].
When TLA (Analog torque limit) is
usable, check the input voltage on
the status display.
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.
If the servo motor may be driven
with safety, repeat acceleration
and deceleration several times to
complete auto tuning.
6 - 6
Possible cause
LSP, LSN, and ST1 are off.
Torque limit level is too low as
compared to the load torque.
Torque limit level is too low as
compared to the load torque.
Gain adjustment fault
Gain adjustment fault
Reference
Section
3.7
Section
7.2.1
Section
3.2
MR-J4-
_A_
Chapter
6
MR-J4-
_A_
Chapter
6