Yaskawa MP940 Reference Manual - Manual (Page 354)

MotionSuite™ MP940 Machine Controller Reference Manual Servo Amplifier Maintenance/Inspection
10-1
Chapter 10: Servo Amplifier
Maintenance and Inspection
This chapter deals with basic maintenance and spot inspection of servo amplifiers, as well as
the error diagnosis and corrective countermeasures thereof. Corrective countermeasures are
given both for errors in the alarm display, as well as for those to which the alarm display
does not apply.
Servo Amplifier Maintenance/Inspection
The basic inspection items for servo motors and servo amplifiers, as well as the
replacement of the absolute encoder battery, appear in this section.
Servo Motor Inspection
For inspection and maintenance of servo motors, follow the simple, daily
inspection process in the table below. The inspection and mainteneance
frequencies in this table are only guidelines. Increase or decrease the
frequency to suit the operating conditions and environment. AC servo
motors are brushless; simple daily inspection is sufficient.
Do not disassemble the servo motor during maintenance inspection. Contact
an authorized Yaskawa agent or sales office.
Item Frequency Procedure Comments
Vibration and Noise Daily Touch and listen. Levels higher than normal?
Appearance According to degree of
contamination Clean with cloth or compressed
air. —
Insulation
Resistance
Measurement Yearly Disconnect the servo amplifier
and test insulation resistance at
500V. Must exceed 10MOhms
(measuring across the servo
motor FG and the U-phase, V-
phase, or W-phase power lead). Contact your Yaskawa cus-
tomer service representa-
tive if the insulation
resistance is below 10M
Ω.
Replace Oil Seal Every 5,000 hours Remove servo motor from
machine and replace oil seal. Applies only to motors with
oil seal.
Overhaul Every 20,000 hours or 5
years Contact your Yaskawa represen-
tative. The customer should not
disassemble and clean the
servomotor.