CHAPTER 7 MAINTENANCE AND INSPECTION
7-18
Maintenance and Discarding
7
7.5.2 Life
The servomotor and servo amplifier have service lives.
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 display a warning on the
amplifier when the limit of the service life of the cooling fan draws near.
The cooling fan operates in the ready for servo-on (RDY) state. If the cooling fan fails to rotate in
the state, the cooling fan must be replaced.
(3) Brake built in servomotor
The brake built in the servomotor is a non-exciting type retention-only brake. Do not use it for
regenerative. Failure will be caused if the brake is used for regenerative, resulting in substantial
reduction of 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 display a warning on the amplifier when the limit of the service life draws near.
(5) Battery (for ABS system)
The battery used in an absolute position system has a service life.
By setting "1" to parameter PA2_78 (display transition at warning detection), a warning is displayed
on the amplifier if the battery voltage becomes lower than the rated value.
Replace the battery soon while leaving the power turned on.
When the battery life becomes extremely short, a possibility for wrong wiring can be considered.
7.5.3 Discarding
(1) Servomotor
Handle the servomotor as a general industrial waste.
(2) Servo amplifier
Handle the servo amplifier as a general industrial waste.
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