Yaskawa Large Capacity Sigma II Series - Manual (Page 341)

8 Inspection, Maintenance, and Troubleshooting
8.1.1 Servomotor Inspection
8-2
8.1 Servodrive Inspection and Maintenance
This section describes the basic inspections and maintenance of servomotors and SERVO-
PACKs and the procedures for replacing the battery for absolute encoders.
8.1.1 Servomotor Inspection
For inspection and maintenance of servomotors, follow the simple, daily inspection proce-
dures in the following table. The AC servomotors are brushless. Simple, daily inspection is
sufficient. The inspection and maintenance frequencies in the table 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 servo-
motor is required, contact your Yaskawa representative.
* Measure across the servomotor FG and the phase-U, phase-V, or phase-
W power line.
Table 8.1 Servomotor Inspections
Item Frequency Procedure Comments
Vibration and
Noise Daily Touch and listen. Levels higher than normal?
Exterior According to
degree of contam-
ination Clean with cloth or com-
pressed air. -
Insulation Resis-
tance Measure-
ment At least once a
year Disconnect SERVOPACK
and test insulation resis-
tance at 500 V. Must
exceed 10 M
Ω. ∗
Contact your Yaskawa rep-
resentative if the insula-
tion resistance is below 10
M
Ω.
Replacing Oil
Seal At least once
every 5000 hours Remove servomotor from
machine and replace oil
seal. Applies only to motors
with oil seals.
Overhaul At least once
every 20000
hours or 5 years Contact your Yaskawa rep-
resentative. The user should not disas-
semble and clean the ser-
vomotor.
IMPORTANT