Mitsubishi MELDAS HS Series Specifications And Instruction Manual page 115

No. Name Details
51 Overload 2 An excessive load
was applied for
longer than the set
time.
52 Excessive error 1 The actual motor
position and model
position difference
was excessive at
servo ON.
53 Excessive error 2 The actual motor
position and model
position difference
was excessive at
servo OFF.
54 Excessive error 3 At servo ON, the
difference of the
actual motor
position and the
model position was
excessive.
58 Collision The collision
detection 1: G0 detection function
activated during
rapid traverse.
59 Collision The collision
detection 1: G2 detection function
activated during
cutting feed.
5A Collision The current
detection 2 command reached
the maximum
capacity of the
driver.
88 Watch dog The amplifier
system did not
operate correctly.
Chapter 10 Troubleshooting
Cause of occurrence
The machine was Visually check whether there was a collision
collided with. with the machine.
Is there interference with the positioning
pin?
Amplifier detector fault. Check the repeatability.
The speed loop gain Is the motor speed fluctuating?
(VGN1) is small.
The motor load is too Is the acceleration/deceleration time
large. constant too short?
The current limit value is too low and a
sufficient torque is not output.
The motor brakes cannot be released?
The excessive error Check the SV023 (SV053) setting value.
detection width is too
small.
The input voltage is low. Is the input voltage 170V or less, or near
170V?
Is the input voltage unstable?
Detector and amplifier Change with another axis and check the
fault repeatability.
The excessive error Check the VS026 setting value.
detection width is too
small.
The CNC has stopped Check the CNC parameters.
the follow up function.
Refer to AL52.
The machine collided. Is there any collision or interference at the
machine end?
The machine load is Check the relation of the parameters and
heavy. machine load.
sv032: Torque offset
sv045: Frictional torque
sv059: Estimated torque gain
The collision detection Is the value set in consideration of the
level is small. machine and motor variation? sv060
Refer to section AL58.
The cutting load is Check whether cutting is being carried out
heavy. correctly, and whether the byte is chipped.
The cutting load is Raise the collision detection level for cutting
heavy. feed. sv035.
The machine collided. Is there any collision or interference at the
machine end?
The machine load is Is there any abnormal section in the
heavy. machine?
The acceleration/ Check the acceleration/deceleration torque.
deceleration time If there is no allowance to the
constant is short. acceleration/deceleration torque in respect
to the motor torque:
1. Lengthen the acceleration/deceleration
time constant.
2. Set sv035:cl2n to 1.
Amplifier fault Check the repeatability.
The grounding is Check the grounding state.
incomplete.
10–6
Investigation method Remedy
Check the cause of
the collision.
Do not use positioning
pins.
Replace the amplifier
detector.
Adjust the gain.
Adjust the parameters.
Repair the brake
circuit.
Adjust the parameters.
Check the power
supply.
Increase the
acceleration/decelerati
on time constant.
Replace the detector
and the amplifier.
Adjust the parameter.
Remove the cause of
the collision.
Reset the parameters,
or correct the
abnormal machine
state.
Adjust the parameter.
Repair the abnormal
section.
Adjust the parameter.
Remove the cause of
the collision.
Repair the abnormal
section.
Adjust the parameter.
Replace the amplifier.
Ground correctly.