2.2 Check of Servomotor and Servo Unit
2-3
2.2
Check of Servomotor and Servo Unit
2.2.1
Check of Servomotor
The following table shows how to conduct a daily check and maintenance of the Servomotor.
Since AC Servomotors are brushless, you need not conduct any other checks than a brief daily
check. The check timing in the table shows a guideline only; you need to define appropriate
check timing according to the motor operating conditions.
Do not disassemble the Servomotor for the purpose of maintenance and check.
Be sure to contact our distributor or sales office nearest to you for disassembly of motor.
* To be measured between FG and either of the motor power line U, V, and W phases.
Table 2.1 Check of Servomotor
Check item
Check timing
Check/maintenance
method
Remark
Vibration and sound
check
Once per day
Touching and hearing.
Shall not be larger
than normal
Appearance check
According to the
degree of
contamination
Cleaning with a cloth or
air
−
Insulation resistance
measurement
Once per year at least
Isolating the motor from
Servo Unit, measure
insulation resistance using
a 500 V megger tester.
Normal resistance is more
than 10 M
Ω.
*
If the resistance is 10
M
Ω
or less, contact
our service group.
Oil seal replacement
Once per 5,000 hours
at least
Replace the seal by
removing the motor from
a machine.
Only for a motor with
an oil seal.
Overall check
Once per 20,000 hours
or 5 years at least
Contact our service group. Do not disassemble
and clean the
Servomotors.
IMPORTANT