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Troubleshooting
 

DC motor problems
Troubleshooting approach
Axis load or binding
Servo & Drive alarms
Servo motors testing
Pulse coder alarms
Emergency stop can't clear
Electrical Shorts
Way Lube problem
PLC troubleshooting & testing
Prox/Limit switch testing
Solenoid/relay/contact/testing
Low voltage at device
Power up problems
Zero Return problems
Power supplies
Axis brakes
Door interlock circuit problems
Chuck will not clamp/unclamp

Testing tools & equipment

Buying megohm | megger meter
Phase rotation tester types
Drawbar force dynamometer

Alarms

Mitsubishi drive M65 alarms
Alarm trouble Questions
Excess following errors


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Questions to ask when troubleshooting machine alarms

  1. Did the alarm get worse over the last few days?

  2. Does it alarm in a cut?

  3. Alarm on the same tool?

  4. How do you clear the alarm?

  5. What is the alarm on the drive?

  6. What direction was the axis moving?

  7. Does the problem occur when cutting the same part?

  8. Does the problem occur with the same tool?

  9. Does it alarm only while cutting?

  10. Does it occur on all three shifts?

  11. Does it happen on hotter days?

  12. Can you make the alarm occur?Test program?

  13. Is it at the end of a rapid move?

  14. During tool change, pallet change, or other operation

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