Appendix 2.13.2.5 Troubleshooting The Spindle System When There Is No Alarm Or Warning - Mitsubishi Electric M700VS Series Setup Manual

Appendix 2.13.2.5 Troubleshooting the spindle system when there is no alarm or warning

If an abnormality is observed in the spindle system but no alarm or warning has occurred, refer to the following table and
check the state.
[1] The rotation speed command and actual rotation speed do not match.
Investigation item
Check the commanded speed and the
spindle rotation speed displayed on
1
the drive monitor screen.
Check whether there is slipping
between the motor and spindle.
2
(When connected with a belt or
clutch.)
Check the spindle parameters
3
(SP026, SP129 and following).
[2] The acceleration/deceleration time is long or has increased in length.
Investigation item
Check whether the friction torque or
1
load inertia has increased.
Check if there is any abnormality in
2
the motor's rotation during coasting.
Check whether the torque limit signal
3
has been input.
[3] The motor stops during cutting.
Investigation item
Check the load rate (load meter value)
1
during cutting.
2 Carry out the same investigations and remedies as section (4).
Investigation results
The speed command is not input
correctly.
The speed command is correct.
There is slipping.
No particular problems found.
The correct values are not set.
The correct values are set.
Investigation results
The friction torque has increased.
No particular problems found.
The bearings do not rotate
smoothly.
The bearings rotate smoothly.
The signal has been input.
The signal is not input.
Investigation results
The load meter sways over 120%
during cutting.
No particular problems found.
M700VS Series Setup Manual
Appendix 2.13 Troubleshooting
Remedies
Input the correct speed command.
Check the investigation item No. 2.
Repair the machine side.
Check the investigation item No. 3.
Set the correct values.
Replace the spindle drive unit.
Remedies
Repair the machine side.
Check the investigation item No. 2.
Replace the spindle motor.
Check the investigation item No. 3.
Release the input signal.
Replace the drive unit.
Remedies
Reduce the cutting amount.
Check the investigation item No. 2.
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