Periodic Inspections - YASKAWA SGM7D Product Manual

10.1 Periodic Inspections

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.
Check the cou-
pling between the
Servomotor and
the machine.
Check for vibra-
tion and noise.
Exterior
Measure the insu-
lation resistance.
Overhaul
10-2
 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
Before starting opera-
tion
Daily
Check for dirt and
grime.
At least once a year
At least once every 5
years or every 20,000
hours
CAUTION
Basic Inspection and Maintenance
Procedure
• 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.
Inspect by touching and by listening.
Clean off the dirt and grime with a
cloth or pressurized air.
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 MΩ or higher.
Contact your Yaskawa representa-
tive.
Remarks
−
There should be no
more vibration or noise
than normal.
−
If the resistance is less
than 10 MΩ, contact
your Yaskawa represen-
tative.
−