Fanuc Power Mate i-D/H Maintenance Manual

7. TROUBLESHOOTING
B63175EN/03
442
The spindle speed changes abnormally due to load, so the spindle is
overheated.
Confirm the follow-
ing parameter :
Check whether spindle speed is constant by view
of the speed meter on CRT.
Constant ?
Heavy cutting?
Is a heavy cutting being per-
formed ? Confirm spindle load
on CRT.
Reduce cutting condition
Parameter 4911
Parameter 4912
Parameter 4913
Parameter 4914
Doesnt the cutting tool worn ?
Worn ?
Spindle servo unit is faulty
Spindle motor is faulty
Replace tool
YES
NO
YES
NO
YES
NO
PRM 4911 : A ratio of spindle speed at which actual spindle speed is
regarded as arrived at a command spindle speed.
PRM 4912 : Spindle speed fluctuation ratio up to which the spindle
speed fluctuation detection alarm is not issued.
PRM 4913 : Spindle speed fluctuation that is not regarded as the
spindle speed fluctuation alarm.
PRM 4914 : Time when a spindle speed changed to when spindle
speed fluctuation detection is started.
7.18
ALARM 704
(SPINDLE SIDE
OVERHEAT)
Remedies
Remedies

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