10.1 Periodic Inspections
10-2
10.1
Periodic Inspections
The following table gives the periodic inspection items for a Servomotor. The inspection periods
given in the table are guidelines. Determine the optimum inspection periods based on the appli-
cation conditions and environment.
CAUTION
Before you perform any maintenance or inspection work, turn OFF the power supply, con-
firm that the CHARGE indicator on the front of the SERVOPACK has gone out, and then use
a tester to check the voltage between the positive and negative terminals on the SERVO-
PACK. Start inspection work only after you have confirmed that the main circuit voltage has
dropped.
If there is any main circuit voltage left, the risk of electric shock still exists. Do not touch the Ser-
vomotor or any wiring.
All inspection and maintenance work must be performed only by qualified engineers.
There is a risk of electric shock or injury.
Contact your Yaskawa representative for help with failures, repairs, or part replacement.
Item
Inspection Period
Basic Inspection and Maintenance
Procedure
Remarks
Check the cou-
pling between the
Servomotor and
the machine.
Before starting opera-
tion
•
Make sure that there are no loose
mounting screws between the Ser-
vomotor and machine.
•
Make sure that there is no loose-
ness in the coupling between the
Servomotor and machine.
•
Make sure that there is no misalign-
ment.
−
Check for vibra-
tion and noise.
Daily
Inspect by touching and by listening.
There should be no
more vibration or noise
than normal.
Exterior
Check for dirt and
grime.
Clean off the dirt and grime with a
cloth or pressurized air.
−
Measure the insu-
lation resistance.
At least once a year
Disconnect the Servomotor from the
SERVOPACK and measure the insu-
lation resistance at 500 V with an
insulation resistance meter. (Mea-
surement method: Measure the resis-
tance between phase U, V, or W on
the Servomotor’s power line and FG.)
The insulation is normal if the resis-
tance is 10 M
Ω
or higher.
If the resistance is less
than 10 M
Ω
, contact
your Yaskawa represen-
tative.
Replace the oil
seal.
At least once every
5,000 hours
Contact your Yaskawa representa-
tive.
This inspection applies
only to Servomotors
with Oil Seals.
Overhaul
At least once every 5
years or every 20,000
hours
Contact your Yaskawa representa-
tive.
−
