Rotate the motor shaft slowly by
hand to see if the value of U-10
changes normally, increasing in
one direction and decreasing in
one direction (0-9999 cycle
display).
Power cable
disconnection
Any phase in UVW of
driver, cable or motor
broken
Disconnect the power supply of
the driver and check the
connection of the power cable. It
is suggested that the multimeter
be used to test the condition.
After eliminating the errors, the
driver should be re-energized.
Driver thermal
power overload
Check if the driver U3-00 is
identical with the motor code of
the motor label (the number after
MOTOR CODE), if not, please
change to the same one, then
power on again.
Overload, the actual
operating torque
exceeds the rated
torque, and continuous
operation for a long
time. (Monitor U0-02
to check the actual
operating torque. If the
motor is in normal
operation, it will not
jam or jitter. If the
U0-02 is longer than
100, it will be
considered improper
selection of the motor.)
Increase the capacity of drivers
and motors. Extend the
acceleration and deceleration
time and reduce the load.
Monitor the U-00, whether it is
running over speed.
Mechanisms are
impacted, suddenly
weighted and distorted.
Eliminate mechanical distortion.
Reduce load
Motor action when
motor brake is not
opened
Measure the voltage of the brake
terminal and decide to open the
brake.
It is suggested to use servo BK
signal to control the brake lock.
If it is not servo control, attention
must be paid to the timing of
brake opening and motor action.
Wrong wiring of
encoder cable, power
cable or broken wire or
loose pin of connector
plug
Check the UVW connection of
power cable to see if there is any
phase sequence error.
The multimeter is used to
measure whether all the encoder
cable are on. Check whether the
plug is loose, for machine
vibration, whether the plug has
shrinkage pin, virtual welding,
damage.
In multiple mechanical
wirings, incorrect
connection of motor
cable to other shafts
leads to incorrect
Detection of servo wiring, the
motor cable, encoder cable are
correctly connected to the
corresponding shaft.
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