— 12-1 —
12. Troubleshooting
12.1. Identifying Problem
If problems have been occurred, check the items shown in Table 12-1. When reporting problems
to the NSK sales or representative, the explanation of the items in Table 12-1 will help us to
identify them.
Table 12-1: Items to be checked when a problem occurs
Items Point to be checked
1)
Check the combination of the
Motor and the Driver Unit
• Check if the following items on the nameplates of the Motor and the Driver Unit
conform to each other: the Motor series code, the Motor size number, and the
Maximum torque code.
• Refer to “3.1.2. Combination of Motor and Driver Unit” for details.
2) Power source voltage • Check the voltage variation of the power source.
3) Trouble recurrence
• Confirm the frequency of occurrence.
[Example]: Once/ every one hour
Several times/week
4)
Occurrence in special
occasion
• At what particular occasion does the problem occur?
[Example]
• When welding process is performed in the proximity.
• When the Motor is accelerating.
• Occurs at the same position.
5) State of warning and alarm
• The state of alarm of warning can be checked with the command TA (TA/HI: Tell
alarm).
(Refer to “11.1. Identifying Alarm and Warning”. )
12.2. Troubleshooting
Refer to a relevant chapters listed below for details.
Table 12-2: Failure State
Item Reference
Warning and Alarm
• 11. Warning and Alarm
Power trouble • 12.2.1. Power Trouble
Motor trouble • 12.2.2. Motor Trouble
Vibration, Abnormal noise,
and unstable motion
• 12.2.3. Vibration, Abnormal Noise, and Unstable Settling
Improper positioning • 12.2.4. Improper Positioning
Communication error • 12.2.5. Communication Error
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