SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 76
A load for the shaft of the servo
motor is large.
Check the load for the
shaft of the servo motor.
Adjust the load for the shaft to
within specifications of the servo
motor.
For the shaft permissible load,
refer to "Servo Motor Instruction
Manual (Vol. 3)".
An external vibration propagated to
the servo motor.
Check the vibration
from outside.
Prevent the vibration from the
external vibration source.
The rotation accuracy is low.
(The speed is unstable.)
The servo gain is low. Or the
response of auto tuning is low.
Check if the trouble is
solved by increasing auto
tuning response ([Pr.
PA09]).
Adjust gains.
The torque is insufficient due to
large load.
Check instantaneous
torque using status
display or setup software
(MR Configurator2
TM
) if
the load exceeds the
maximum torque or
torque limit value.
Reduce the load or use a larger
capacity servo motor.
An unintended torque limit has
been enabled.
Check if TLC (Limiting
torque) is on using status
display or setup software
(MR Configurator2
TM
).
Cancel the torque limit.
The setting of the torque limit is
incorrect.
Check if the limiting
torque is too low.
[Pr. PA11] and [Pr.
PA12], or analog input
Set it correctly.
For a servo motor with an
electromagnetic brake, the lock
has not released.
Check the power supply
of the electromagnetic
brake.
Turn on the electromagnetic brake
power.
The command from the controller
is unstable.
Check the ripple of the
command
frequency with setup
software (MR
Configurator2
TM
).
Review the command from the
controller. Check the cable for
command if there is failure such
as disconnection.
The machine vibrates
unsteadily when it stops.
The servo gain is low. Or the
response of auto tuning is low.
Check if the trouble is
solved by increasing
auto tuning response
([Pr. PA09]).
Adjust gains.
The servo motor starts to drive
immediately after power on of
the driver.The servo motor
starts to drive immediately
after servo-on.
SON (Servo-on) is on at power
on.
Check if SON (Servo-
on) and RD (Ready) are
on using status display
or setup software (MR
Configurator2
TM
).
Review the sequence of
SON(Servo-on).
An analog signal is inputted from
the beginning.
Check the status of
analog speed command
and analog torque
command using status
display or setup
software (MR
Configurator2
TM
).
Review the timing of inputting
analog signal.
Zero point of an analog signal
deviates.
Check if the servo motor
drives while 0 V is
inputted to the analog
signal.
Execute the VC automatic offset
or adjust offset of the analog
signal with
［
Pr.PC37
］
or
［
Pr.PC38
］
.
For a servo motor with an
electromagnetic brake, the lock
release timing is not correct.
Check the lock release
timing.
Review the lock releae timing.
The connection of the servo
motor is incorrect.
Check the wiring of
U/V/W.
Connect is correctly.

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English