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10. TROUBLESHOOTING
No. Start-up sequence Fault Investigation Possible cause Refer to
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 7
4 Gain adjustment
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
Make gain adjustment in the
following procedure:
If the servo motor may be
run with safety, repeat
acceleration and
deceleration several times
to complete auto tuning.
Gain adjustment fault Chapter 7
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