NSK Megatorque PS Series User Manual

— 12-3 —
12.2.3. Vibration, Abnormal Noise or Unstable Settling
Table 12-5: Troubleshooting for vibration, abnormal noise and unstable settling
Cause Remedy
1)
Wrong combination of Motor and
Drive Unit.
• Check if the combination of the Motor and the Driver Unit is
correct.
2)
Loose mounting of the fixture and/or
the Motor
• Check for loose mounting of the fixture and the Motor.
3) Poor setting of the servo gains
4) Mechanical resonance.
• Refer to “5. Tuning” for adequate tuning.
5)
Low rigidity of the total mechanical
system.
• Refer to “5. Tuning” for adequate tuning.
• If the problem remains, review the rigidity of the total mechanism.
6)
Overload or interference with the
mechanical system of the
equipment.
• Remove the external interference.
7)
Defective Cable, Motor, and/or
Driver Unit.
• Refer to “Appendix 2: How to Check Motor Condition” and check
the cable and the Motor.
• If no failure is found in the Cable and the Motor, the Driver Unit
may be defective. Replace it referring to “Appendix 4: Procedure
for Replacing the EDC Driver Unit.”
12.2.4. Improper Positioning
Table 12-6: Troubleshooting for improper positioning
Cause Remedy
1)
Wrong combination of Motor and
Driver Unit.
• Check if the combination of the Motor and the Driver Unit is
correct.
2) An alarm or a warning is occurring. • Identify the alarm or the warning.
3)
Loose mounting of the fixture and/or
the Motor.
• Check for loose mounting of the fixture and the Motor.
4) Poor setting of the servo gains. .
• The positioning accuracy is poor even the IPOS signal is closed.
• Review the tuning state of the servo related gains.
5)
Overload and/or an excessive
friction load to the Motor due to the
mechanical interference with the
surrounding mechanism.
• Remove the external interference.
6)
External noise interferes in the pulse
train command signal.
• Take measures against the external noise.
7)
An objective program channel is not
selected in the program operation
• Use the monitor IO0 (Input/output monitor 0) to confirm if the
objective channel is selected.
8)
Defective Cable, Motor and/or Driver
Unit.
• Refer to “Appendix 2: How to Check Motor Condition” and check
the cable and the Motor. Replace them if necessary.
• If no failure is found in the Cable and the Motor, the Driver Unit
may be defective. Replace it referring to “Appendix 4: Procedure
for Replacing the EDC Driver Unit.”

NSK Megatorque PS Series Specifications

General

Brand	NSK
Model	Megatorque PS Series
Category	Engine
Language	English