11 - 14
11. TROUBLESHOOTING
Display Name
Definition
Cause
Action
(Note 2)
Alarm
detailed
information
A51
Overload 2
Maximum output
current flowed
continuously for
several seconds
due to machine
collision or the like.
1. Servo amplifier fault.
<Check method>
The alarm does not occur when the
operation is checked on the servo
motor alone, disconnected from the
machine. (Check the operation by
restoring to the initial gain.)
Change the servo amplifier.
2. Servo system is instable, causing
hunting and vibration.
1. Repeat
acceleration/deceleration
to execute auto tuning.
2. Change auto tuning
response setting.
3. Set auto tuning to OFF
and make gain
adjustment manually.
4. Check the coupling with
servo motor shaft for
looseness.
3. Machine collision
1. Check operation pattern.
2. Install limit switches.
3. Check if the
electromagnetic brake is
released.
4. Wrong connection of servo motor.
Servo amplifier's output terminals U,
V, W do not match servo motor's
input terminals U, V, W.
Connect correctly.
5.
Encoder
fault
<Check method>
When the servo motor shaft is rotated
with the servo-off, the cumulative
feedback pulses do not vary in
proportion to the rotation angle of the
shaft. Or error such as deviation in
position within one-revolution at a
stop.
Change the servo motor.
6. Wire breakage of power supply
cable.
Repair the cable.
7. Servo motor fault.
Change the servo motor.
Summary of Contents for Melservo-J3 Series MR-J3-B
Page 19: ...10 MEMO ...
Page 55: ...1 36 1 FUNCTIONS AND CONFIGURATION MEMO ...
Page 61: ...2 6 2 INSTALLATION MEMO ...
Page 179: ...4 58 4 SIGNALS AND WIRING MEMO ...
Page 241: ...5 62 5 OPERATION MEMO ...
Page 357: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 385: ...11 28 11 TROUBLESHOOTING MEMO ...
Page 397: ...12 12 12 OUTLINE DRAWINGS MEMO ...
Page 755: ...17 70 17 SPEED CONTROL OPERATION MEMO ...
Page 793: ...App 38 APPENDIX MEMO ...
Page 799: ...MEMO ...