1.7 Servo Drive Maintenance and Inspection
1-23
1
Ou
tline
1.7.3
Servomotor Inspection
The AC servomotor is brushless and simple daily inspection is sufficient. Use the inspection frequencies given
in the following table as a guide. Determine the most appropriate inspection frequency from the actual usage
conditions and the environment.
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Measure the insulation resistance between the U, V, or W phase on the servomotor’s power line and the frame ground.
Inspected Item
Inspection Frequency
or Interval
Inspection or Maintenance
Procedure
Remark
Vibration and
Noise Check
Daily
Inspect by touching and listening
to the servomotor.
There should be no more vibration
or noise than normal.
Appearance
Inspection
Depends on amount of
dirt.
Clean with a cloth or compressed
air.
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Insulation
Resistance Mea-
surement
At least once a year
Disconnect the servomotor from
the SERVOPACK and measure
the insulation resistance with a
500 V insulation resistance
meter.* The servomotor is normal
if the resistance is higher than 10
M
Ω
.
• If the resistance is 10 M
Ω
or
lower, contact your Yaskawa rep-
resentative.
• Do not measure the insulation
resistance of the encoder or per-
form a withstand test on it.
Oil Seal
Replacement
At least once every 5,000
hours
Contact your Yaskawa represen-
tative.
Only necessary if the servomotor
has an oil seal.
Overhaul
At least once every 5
years or 20,000 hours
Contact your Yaskawa represen-
tative.
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