8. Maintenance and Inspection
8-1
8.
Maintenance and Inspection
8.1
Maintenance and Inspection
This chapter explains how to conduct basic maintenance and inspection, diagnosis and
troubleshooting on the servo motor and drive.
8.1.1
Precautions
1.
Measuring motor voltage: The voltage output from the servo amp to the motor is PWM controlled,
and, for this reason, its waves take the form of pulses. Use a rectifier voltmeter for accurate
measuring because different meters often produce different results.
2.
Measuring motor current: Connect a moving-iron-type ampere meter directly for use as the pulse
waveform becomes smooth sine waves to some degree because of the motor's reactance.
3.
Measuring electric power: Use an electrodynamometer based on the 3 power meter method.
4.
Other gauges: When using an oscilloscope or digital voltmeter, make sure that they do not touch
the ground. Use 1 [mA] or lower of gauge input current.
8.1.2
What to Inspect
Be sure to start inspection approximately 10 minutes after power is turned off because the
charged voltage left in the internal smoothing condenser may cause an accident.
(1)
Servo Motor Inspection
Caution
Be sure to start inspection approximately 10 minutes after power is turned off because the charged
voltage left in the internal smoothing condenser may cause an accident.
Inspection
Item
Inspection Period
Inspection and Handling
Notes
Vibration and
sound check
Every month
Touch and listen to sound.
The feel and sound should be
no more notable than usual.
Exterior
inspection
Depending on the
contamination or
damage
Clean with cloth or air
pressure.
-
Insulation
resistance
measurement
At least once a year
Disconnect from the drive
and measure insulation
resistance.
Normal resistance is 10 [
㏁
]
or higher. Note 1)
If resistance is 10[
㏁
] or lower,
contact our service center.
Oil seal
replacement
Once
every 5,000 hours at the
least
Remove it from the machine
for replacement.
This only applies to motors
with an oil seal.
General
inspection
Every 20,000 hours or
once every 5 years at
the least
Contact our service center.
Do not disassemble the servo
motor for cleaning yourself.
NOTE 1)
Conduct measuring between FG and one of the U, V, and W power lines of the servo motor.
Summary of Contents for L7 A001
Page 1: ...VER 1 5...
Page 2: ......
Page 32: ...1 Product Components and Signals 1 20...
Page 38: ...2 Installation 2 6...
Page 54: ......
Page 188: ...7 Product Specifications 7 26 L7 A020 L7 A035 Weight 2 5 kg cooling fan included...
Page 210: ...8 Maintenance and Inspection 8 14...
Page 211: ...9 Appendix 9 1 9 Appendix...
Page 218: ...9 Appendix 9 8...
Page 221: ......
Page 222: ......
