11 Inspection, Maintenance, and Troubleshooting
11.1.1 Motor
11-2
11.1
Inspection and Maintenance
11.1.1
Motor
(1) Inspection
The following table provides explanations about the inspections required for the spindle motor and the servo-
motor. The inspection and maintenance frequencies in the table are only guidelines. Increase or decrease the
frequency to suit the operating conditions and environment.
(2) Replacement Schedule
The parts of the motor have a limited service life due to mechanical wear. Perform periodic inspections for
preventive maintenance. The part replacement period varies with the usage condition and usage environment.
A part must be replaced if there is any problem, even if it is not yet time to replace it. Contact your Yaskawa
representative if a part needs to be replaced or if the standard replacement period has elapsed.
Item
Frequency
Procedure
Comments
Vibration and Noise
Daily
Touch and listen.
There is no problem as long as
vibration and the sound level do
not increase over normal levels.
–
Exterior
According to degree of
contamination
Clean with cloth or compressed
air.
–
Insulation Resistance
Measurement
At least once a year
Disconnect the SERVOPACK and
test the insulation resistance with a
500-V resistance meter between
each of the phases U, V, and W in
the motor’s main circuit cable and
FG. Must exceed 10 M
Ω
.
Contact your Yaskawa repre-
sentative if the insulation resis-
tance is below 10 M
Ω
.
Overhaul
Spindle motor:
At least once every
12,000 hours or 2
years.
Servomotor:
At least once every
20,000 hours or 5
years.
Contact your Yaskawa representa-
tive.
–
During inspection and maintenance, do not disassemble the motor.
Motor
Part
Standard Replacement Period
Remarks
Spindle motor
Cooling fan
12,000 hours or 2 years
A part must be replaced if there
is any problem, even if the
standard replacement period
has not yet elapsed.
Bearing
12,000 hours or 2 years
Servomotor
Oil seal
5,000 hours
Bearing
20,000 hours or 5 years
