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TROUBLESHOOTING
1-73August 9, 2005
D SERIES CONTROLLER
TROUBLESHOOTING AND COMPONENT REPLACEMENT
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6. Malfunction of the motor.
7. Servo spot weld gun:
–Clamping pressure and/or clamping time is excessive.
–Distance between weld points is short; the motor does not have time to cool suffi-
ciently between welds.
–Clamping pressure setting exceeds the servo gun motor power capacity.
⇒
Check the cyclo reduction unit, the gear, or the bearing(s) for mechanical failure.
Replace as necessary.
⇒
Re-teach the robot motion as necessary.
⇒
Check the harness and servo unit for electrical malfunctions and replace if necessary.
⇒
Replace the 1KB board.
⇒
Replace the 1KQ/1NR board.
Servo Spot Weld Gun
⇒
If the weld points are close to each other, set a time delay. This provides a cool-down
period for the servo gun motor.
⇒
Set the clamping force lower (see servo gun manufacturer’s specifications).
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