9 - 2
9. 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