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11-20
11-5 Periodic Maintenance
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
11
Error and Maintenance
11-5 Periodic Maintenance
Servomotors and Servo Drives contain many components and will operate properly only when
each of the individual components is operating properly.
Some of the electrical and mechanical components require maintenance depending on
application conditions. Periodic inspection and replacement are necessary to ensure proper
long-term operation of Servomotors and Servo Drives. (Quotes from The Recommendation for
Periodic Maintenance of a General-purpose Inverter published by JEMA.)
The periodic maintenance cycle depends on the installation environment and application
conditions of the Servomotors and Servo Drives.
Recommended maintenance times are listed below for Servomotors and Servo Drives. Use
these for reference in periodic maintenance.
Servomotor Limit
Œ
The limit for units is listed below.
Bearings:
20,000 hours
Decelerator: 20,000 hours
Oil seal: 5,000 hours
Encoder: 30,000 hours
These values presume an ambient motor operating temperature of 40
°
C, within the allowable
axial load, rated operation (rated torque and rated rotation speed), and proper installation as
described in this manual.
The oil seal can be replaced.
Œ
The radial load during operation (rotation) on timing pulleys and other components contacting
belts is twice or more the still load. Consult with the belt and pulley manufacturers and adjust
designs and system settings so that the motor allowable axial load is not exceeded even during
operation. If a motor is used under a shaft load exceeding the allowable limit, the motor shaft can
break, and the bearings can burn out.
Caution
After replacing the unit, transfer to the new unit all data
needed to resume operation, before restarting the operation.
Equipment damage may result.
Never repair the product by disassembling it.
Electric shock or injury may result.