Series 16/18/160/180-Model C Maintenance Manual, GFZ-62755EN ...

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8. TROUBLESHOOTING B–62755EN/018.25ALARM 700(OVERHEAT ATCONTROL SIDE)RemediesBecause an ambient temperature of the control unit becomes high, athermostat mounted on the back panel of NC functions and informs analarm.(START)Check fan on the top of the control unit is operatingwhen power is on.OperatingNOYESCheck temperature around the control unit ishigh (more than 45 degrees)Fun motor is faultyReplace fan motorHigh temperature?YESNOThermostat on the back panel of NCis faulty.Lower temperature aroundthe control unitReplace the back panel of NC.366
B–62755EN/018.TROUBLESHOOTING8.26ALARM 704 (SPINDLESPEEDFLUCTUATIONDETECTION ALARM)RemediesSpindle speed changes abnormally due to load.Check whether spindle speed is constant by viewof the speed meter on CRT.Constant ?YESNOIs a heavy cutting being performed? Confirm spindle loadon CRT.Reduce cutting conditionYESHeavy cutting?NOConfirm the followingparameter :PRM 4911PRM 4912PRM 4913PRM 4914Doesn’t the cutting tool worn ?Worn ?YESNOReplace toolSpindle servo unit is faultySpindle motor is faultyRemediesPRM 4911 : A ratio of spindle speed at which actual spindle speed isregarded as arrived at a command spindle speed.PRM 4912 : Spindle speed fluctuation ratio up to which the spindlespeed fluctuation detection alarm is not issued.PRM 4913 : Spindle speed fluctuation that is not regarded as the spindlespeed fluctuation alarm.PRM 4914 : Time when a spindle speed changed to when spindle speedfluctuation detection is started.367
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GE Fanuc AutomationComputer Numeric
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B-62755EN/01PREFACEPREFACEDescripti
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B-62755EN/01PREFACERelated manualsT
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B-62755EN/01 2.7 HOW TO REPLACE TH
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B-62755EN/01 7. AC SPINDLE (ANALOG
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B-62755EN/011DISPLAYAND OPERATION O
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B-62755EN/011. DISPLAY AND OPERATIO
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B-62755EN/012. HARDWARE2.4.6Connect
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B-62755EN/012. HARDWARE2.5.2Main CP
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B-62755EN/012. HARDWARENo. Name Spe
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B-62755EN/012. HARDWARE2.5.4Option
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B-62755EN/012. HARDWARE2.5.9I/O Car
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B-62755EN/012. HARDWARE2.5.1264-bit
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B-62755EN/012. HARDWARE2.6.3Control
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B-62755EN/012. HARDWARE2.6.4Modules
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B-62755EN/012. HARDWARE2.6.5CRT/MDI
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B-62755EN/012. HARDWARE2.12ADJUSTIN
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B-62755EN/013. INPUT AND OUTPUT OF
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B-62755EN/015. DIGITAL SERVO5DIGITA
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B-62755EN/015. DIGITAL SERVO(2)MOTO
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B-62755EN/015. DIGITAL SERVOAlarm1#
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B-62755EN/016ACSPINDLE (SERIAL INTE
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B-62755EN/01APPENDIXC. LIST OF MAIN
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B-62755EN/01APPENDIXD. BOOT SYSTEMD
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B-62755EN/01ENOTATIONAPPENDIXOF MDI
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B-62755EN/01Numbers16-TC/MC, 160-TC
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B-62755EN/01INDEXMMain CPU board, 1
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Revision RecordFANUC MAINTENANCE
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Series 16/18/160/180-Model C Maintenance Manual, GFZ-62755EN ...

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