3.13 Manipulator crashes on power down
Description
The manipulator is able to work correctly while Motors ON is active, but when
Motors OFF is active, it collapses under its own weight.
The holding brake, integral to each motor, is not able to hold the weight of the
manipulator arm.
Consequences
The fault can cause severe injuries or death to personnel working in the area or
severe damage to the manipulator and/or surrounding equipment.
Possible causes
The symptom can be caused by:
•
Faulty brake.
•
Faulty power supply to the brake.
Recommended actions
The following actions are recommended:
Information
Action
Determine which motor(s) causes the robot
to collapse.
1
See the circuit diagram.
Check the brake power supply to the col-
lapsing motor during the Motors OFF state.
2
If found faulty, the motor must be replaced
as a complete unit.
Remove the resolver of the motor to see if
there are any signs of oil leaks.
3
If found faulty, the motor must be replaced
as a complete unit.
Remove the motor from the gearbox to in-
spect it from the drive side.
4
58
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
© Copyright 2005-2018 ABB. All rights reserved.
3 Troubleshooting by fault symptoms
3.13 Manipulator crashes on power down
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