Life - Fuji Electric Alpha7 VV User Manual

CHAPTER 7 MAINTENANCE AND INSPECTION

7.5.2 Life

The servomotor and servo amplifier have service lives even if they are used under regular operating
conditions.
Contact our service division for parts replacement. Never disassemble or repair by yourself.
(1) Bearing of servomotor
The service life of the servomotor varies according to the operating conditions.
Replacement is necessary if abnormal noise or excessive vibration is found during inspection.
(2) Cooling fan built in servo amplifier
Set parameter PA2_78 (Display transition at warning detection) at 1 to show a warning on the
keypad of the front panel of the servo amplifier when the limit of the service life of the cooling fan
draws near.
The cooling fan runs normally when the control power supply is turned ON. It is necessary to
replace the cooling fan if it does not rotate in this condition.
The remaining life can be checked using the PC Loader. For details, refer to "CHAPTER 14 PC
LOADER."
(3) Brake built in servomotor
The brake built in the servomotor is a non-exciting type retention-only brake. Do not use it for
braking. Failure will be caused if the brake is used for braking, resulting in substantial reduction of
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the service life. Use it only for retention of a stopped servomotor.
(4) Capacitor built in servo amplifier
The electrolytic capacitors used for the main circuit and control circuit of the servo amplifier have
service lives.
For capacitors used in the main circuit, set parameter PA2_78 (Display transition at warning
detection) at 1 to show a warning at the keypad on the front panel of the servo amplifier when the
limit of the service life draws near.
The remaining life can be checked using the PC Loader. For details, refer to "CHAPTER 14 PC
LOADER."
(5) Battery (for ABS system)
The battery used in an absolute position system has a service life.
If the battery voltage is lower than the rated value, a warning is displayed at the keypad on the front
panel of the servo amplifier.
Replace the battery soon while leaving the control power turned on.
In case that the battery life is extremely short, there is possibility of wrong wiring of encoder cable.
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Maintenance and Discarding