Troubleshooting U511 User’s Manual
11-4 Aerotech, Inc. Version 1.1
11.2. Servo Related Problems
Some common problems that relate to the use of servo motors are listed and diagnosed in
Table 11-2.
Table 11-2. Troubleshooting for Servo Related Problems
Problem Possible Causes / Solutions See Also ...
The motor has no
torque ...
The appropriate axis is not enabled.
The motor wiring is faulty.
The amplifier fuse is blown.
The amplifier is faulty.
3.0
Appendix B
Motor or Amp
Documents
The motor buzzes or
makes an unusual noise
...
The PID loop gains are not adjusted properly. 2.6, 8.0
The motor runs away
when it is enabled ...
The feedback device is not connected.
The wrong feedback channel has been specified.
Verify feedback.
The wrong feedback setup code has been specified.
Verify feedback.
2.6 4.8
Appendix B
Motor or Amp
Documents
A position or integral
trap error occurs when
the motor is enabled ...
The feedback device is not connected.
The wrong feedback channel has been specified.
Verify feedback.
The motor has no torque. (See above)
2.6, 4.8
Appendix B
Motor or Amp
Documents
A position or integral
trap error occurs when
motion is commanded
...
The feedback device is not connected.
The wrong feedback channel has been specified.
Verify feedback.
The wrong feedback setup code has been specified.
Verify feedback.
The motor has no torque. (See above)
2.6, 4.8
Appendix B
Motor or Amp
Documents
The amplifier does not
enable ...
An amplifier fault has occurred. This could be due
to an improperly wired or shorted motor.
The amplifier is faulty.
Motor or Amp
Documents
Appendix B
Always disconnect main power connection before opening the U511 chassis.
WARNING
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