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9. TROUBLESHOOTING
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
5 Cyclic operation Position shift occurs Confirm the cumulative
command pulses, cumulative
feedback pulses and actual
servo motor position.
Pulse counting error, etc.
due to noise.
(2) in this
section