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6. Troubleshooting
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Alarm No.
58
Collision detection 1 G0
When the collision detection function is valid, the disturbance torque exceeded the collision detection
value during rapid traverse (G0).
Investigation details Investigation results Remedies SV SP
The machine has collided. Check the machining program and
soft limit settings.
1 Check whether the machine has
collided.
The machine has not collided. Increase the detection level (SV060).
(The detection level should have an
allowance and be set as approx.
1.5-times the maximum disturbance
torque.)
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Alarm No.
59
Collision detection 1 G1
When the collision detection function is valid, the disturbance torque exceeded the collision detection
level during cutting feed (G1).
Investigation details Investigation results Remedies SV SP
The machine has collided. Check the machining program and
soft limit settings.
1 Check whether the machine has
collided.
The machine has not collided. Increase the detection level (SV035.
clG1).
(Set the detection level larger than
the maximum cutting load.)
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Alarm No.
5A
Collision detection 2
When the collision detection function is valid, the command torque reached the motor's maximum
torque.
Investigation details Investigation results Remedies SV SP
The machine has collided. Check the machining program and
soft limit settings.
1 Check whether the machine has
collided.
The machine has not collided. Investigate item 2.
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The current is saturated during
acceleration/deceleration.
Investigate item 3. 2 Check whether the current value on
the NC Servo Monitor screen is
saturated during
acceleration/deceleration.
The current value during
acceleration/deceleration is
appropriate.
Investigate the cause of the load
fluctuation.
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The constant can be changed. Increase the acceleration/
deceleration time constant.
3 Can the acceleration/deceleration
time constant be changed?
The constant cannot be changed. Set to ignore collision detection
method 2.
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Alarm No.
5C
Orientation feedback error
After orientation was completed, the command and feedback error exceeded the parameter setting.
Investigation details Investigation results Remedies SV SP
The cable is not correctly shielded. Shield the cable. 1 Check the PLG cable shield.
The cable is correctly shielded. Investigate item 2.
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The cable is incorrectly connected or
broken.
Replace the cable. 2 Check the PLG cable connection.
Normal Investigate item 3.
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There is a problem. Adjust the PLG output waveform. 3 Check the PLG output waveform.
Normal Replace the drive unit
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