
1. AC SERVO MOTOR
B-65165E/02 MOTOR MAINTENANCE MAINTENANCE
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1.2 DAILY INSPECTION OF AC SERVO MOTORS
Before starting operation, or periodically (once a week or month), you
should inspect the AC servo motors in terms of the following:
(1) Vibration and noise
Check the motor for abnormal vibration (by the hand) and noise
(by the ear) when the motor is:
• Not rotating
• Rotating at low speed
• Accelerating or decelerating
If you find anything unusual, contact your FANUC service staff.
(2) Damage on the outside
Check the motor cover (red plastic) for crevices and the motor
surface (black coating) for scratches and cracks.
If you find a crevice in the motor cover, you should replace it as
quickly as possible. For how to replace, see the description about
the pulse coder in Section 1.4. If you are not sure about
replacement, contact you FANUC service staff.
If there is a scratch or crack on the motor surface, the user should
repair it by himself as required. If coating has come off, dry the
portion of interest (or the entire surface) and coat it with paint for
machines such as urethane paint.
Replace a motor cover with a crevice or crack
as quickly as possible.