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16. INDEXER POSITIONING OPERATION
16.12 Troubleshooting
16.12.1 Troubleshooting at start-up
CAUTION
Excessive adjustment or change of parameter setting must not be made as it will
make operation instable.
POINT
Using the MR Configurator, you can refer to unrotated servo motor reasons,
etc.
The following faults may occur at start-up. If any of such faults occurs, take the corresponding action.
No. Occurring
stage
Fault
Investigation
Possible
cause
Reference
1 Power
on
The 7-segment
LED display is not lit.
7-segment LED
display flickers.
Not improved if connectors
CN6, CN2 and CN3 are
disconnected.
1. Power supply voltage fault
2. Servo amplifier is faulty.
Improved when connectors
CN6 is disconnected.
Power supply of CN6 cabling is
shorted.
Improved when connector
CN2 is disconnected.
1. Power supply of encoder
cabling is shorted.
2. Encoder is faulty.
Improved when connector
CN3 is disconnected.
Power supply of CN3 cabling is
shorted.
Alarm occurs.
Remove cause.
Section
16.12.4
2
Switch on servo-on Alarm occurs.
Remove cause.
Section
16.12.4
Servo motor shaft is
not servo-locked
(is free).
1. Check the display to see if
the servo amplifier is ready
to operate.
2. Check the external I/O
signal indication to see if
the servo-on is on.
1. Servo-on is not switched on.
(Wiring mistake)
2. Interface power supply (24 V
DC) is not supplied.
Section 8.5.4
3
Gain adjustment
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 three or four
times to complete auto
tuning.
Gain adjustment fault
Chapter 9
Large load inertia
moment causes the
servo motor shaft to
oscillate side to side.
If the servo motor can be
driven safely, repeat
acceleration and deceleration
three or four times to
complete auto tuning.
Gain adjustment fault
Chapter 9
4
Cyclic operation
Position shift occurs
Confirm the command
position, current position,
cumulative feedback pulses
and actual servo motor
position.
Pulse counting error, etc.
due to noise.
Содержание Melservo-J3 Series MR-J3-B
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