Yaskawa Sigma II Series DC Power Input SGMAJ - Manual (Page 299)

10 Inspection, Maintenance, and Troubleshooting
10.2.1 Servomotor Inspection
10-18
10.2 Inspection and Maintenance
10.2.1 Servomotor Inspection
The AC servomotors are brushless. Simple, daily inspection is sufficient. The inspection and maintenance fre-
quencies in Table 10.6 are only guidelines. Increase or decrease the frequency to suit the operating conditions and
environment.
During inspection and maintenance, do not disassemble the servomotor. If disassembly of the servomotor is
required, contact your Yaskawa representative.
* Measure across the servomotor FG and the phase-U, phase-V, or phase-W power line.
10.2.2 SERVOPACK Inspection
For inspection and maintenance of the SERVOPACK, follow the inspection procedures in Table 10.7 at least
once every year. Other routine inspections are not required.
Table 10.6 Servomotor Inspections
Item Frequency Procedure Comments
Vibration and Noise Daily Touch and listen. Levels higher than normal?
Exterior According to degree
of contamination Clean with cloth or compressed
air. −
Insulation Resistance
Measurement At least once a year Disconnect SERVOPACK and
test insulation resistance
at 500 V. Must exceed 10 M
Ω . ∗
Contact your Yaskawa repre-
sentative if the insulation
resistance is below 10 M
Ω .
Replacing Oil Seal At least once every
5,000 hours Remove servomotor from
machine and replace oil seal. Applies only to servomotors
with oil seals.
Overhaul At least once every
20,000 hours or 5
years Contact your Yaskawa represen-
tative. The user should not disassem-
ble and clean the servomotor.
IMPORTANT
Table 10.7 SERVOPACK Inspections
Item Frequency Procedure Comments
Clean Interior and
Circuit Boards At least once a year Check for dust, dirt, and oil
on the surfaces. Clean with cloth or compressed air.
Loose Screws Check for loose terminal
block and connector
screws. Tighten any loose screws.
Defective Parts in
Unit or on
Circuit Boards Check for discoloration,
damage, or discontinuities
due to heating. Contact your Yaskawa representative.