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Sigma II User's Manual
9.1 Servodrive Inspection and Maintenance
This section describes the basic inspections and maintenance of servomotors and servo
amplifiers and the procedures for replacing the battery for absolute encoders.
9.1.1
Servomotor Inspection
For inspection and maintenance of servomotors, follow the simple, daily inspection
procedures in the following table.
The AC servomotors are brushless. Simple, daily inspection is sufficient under most
conditions. The inspection and maintenance frequencies in the table are only guide-
lines. Increase or decrease the frequency to suit the operating conditions and envi-
ronment.
• During inspection and maintenance, do not disassemble the servomotor.
If disassembly of the servomotor is required, contact Yaskawa.
Action or
Problem
Vibration and
Daily
Noise
According to degree
Exterior Dirt
of contamination
Insulation
Resistance
At least every year
Measurement
Oil Seal
At least every 5000
Replacement
hours
Servomotor
At least every 20000
Overhaul
hours or 5 years
*
Measure across the servomotor FG and the U-phase, V-phase, or W-phase power line
IMPORTANT
Servomotor Inspections
Frequency
Touch and listen.
Clean with cloth or com-
pressed air.
Disconnect servo amplifier
and test insulation resis-
tance at 500V. Must
exceed 10MΩ.*
Remove servomotor from
machine and replace oil
seal.
Contact Yaskawa.
Chapter 9: Inspection, Maintenance, and Troubleshooting
Procedure
Levels higher than normal?
—
Contact Yaskawa if the insu-
lation resistance is below
10MΩ.
Applies only to motors with
oil seals.
The user should not disas-
semble and clean the servo-
motor.
9-2
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