8. Maintenance and Inspection
8-3
8.2
Diagnosis of Abnormality and
Troubleshooting
AL-
is displayed if a problem occurs during operation. In this case, try to solve the problem
by following this advice. If the problem persists, contact our service center.
8.2.1
Servo Motor
[Cause of abnormality, how to inspect, and troubleshooting]
Symptoms
Cause
How to inspect
Troubleshooting
The motor
does not
move.
The input of CCWLIM and
CWLIM is off.
Refer to "1.2 System Configuration."
Turn on the input of CCWLIM and
CWLIM.
Parameters are incorrectly set.
Check the parameters of the motor,
encoder, and encoder type control
mode.
Reset the parameters. (Refer to
“Chapter 4 Parameters.”)
The motor has defects.
Measure the motor lead terminal with
a tester (resistance between phases:
several ohms).
Replace the motor.
Locking screws are loose.
Check locking screws.
Fasten loose screws.
External wiring is incorrect or
cables are disconnected.
Check the wiring of the motor and the
encoder.
Redo the wiring.
Replace cables.
The encoder has defects.
Check output waves.
Replace the encoder.
(Contact our service center.)
Motor rotation
is unstable.
Connection is bad.
Check the connection of the motor
lead terminal.
Fix bad connection.
Input voltage is low.
Check the input voltage of the drive.
Change power.
Overload occurs.
Check the condition of the machine.
Remove foreign substances in the
rotating unit and provide lubricants (or
grease).
The motor
overheats.
The ambient temperature is
high.
Check the temperature around the
motor. (40[
℃
] or lower)
Change heat transfer structure.
Install a cooling fan.
The surface of the motor is
contaminated.
Check whether there is any foreign
substance on the surface of the motor.
Clean the surface of the motor.
Overload occurs.
Check the load factor of the drive.
Check acceleration/deceleration time.
Reduce load.
Increase acceleration/deceleration
time.
Replace with a motor of greater
capacity.
The magnetic power of the
magnets is reduced.
Check counter voltage and voltage
waveforms.
Replace the motor.
A strange
sound
occurs.
Coupling is bad.
Check the tightness of coupling
screws and the concentricity of the
connection.
Readjust the coupling.
Bearings are abnormal.
Check the vibration and sound of
bearings.
Contact us.
Parameters are incorrectly set.
(Inertia, gain, and time
constant)
Check parameters.
Refer to “Chapter 4 Parameters.”
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: ......
