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Excessive error 1
Alarm No.
A difference between the actual and theoretical motor positions during servo ON exceeded the setting
52
value.
Investigation details
The load inertia is large.
The unbalance torque in the Z
1
(gravity) direction is high.
An excessive workpiece or tool is
mounted on the spindle.
Check the excessive error detection
width.
Servo
SV053
2
Spindle
SP023 (Interpolation, spindle
synchronization)SP053 (Non-
interpolation)
Check the position detector polarity.
SV017/bit4 (Servo)
3
SP017/bit4 (Spindle: position FB)
SP017/bit0 (Spindle: speed FB)
#3106/bit7 (Synchronous tap control)
4 Check the alarm No. "51" items.
Excessive error 2
Alarm No.
A difference between the actual and theoretical motor positions during servo OFF exceeded the setting
53
value.
Investigation details
Check the follow-up function while the
1
NC is in the servo OFF state.
Check whether the axis has moved
during servo OFF (either by visual
inspection or monitor the position
droop waveform).
2
[1] Check if the motor brake is
released in the middle.
[2] Check if the axis moves because
the servo OFF is applied during the C
axis mode.
Check the excessive error detection
width.
3
SV026 (Servo)
(Note) Set the same value to SV023.
Investigation results
The load inertia is excessive.
The load inertia is normal.
The excessive error detection width is
too small.
Servo standard value:
SV053 ={RAPID/(60*PGN1)}/2
Spindle standard value:
No alarm is set at SP023 =120:0
SP053 =motor max. speed × 6/PGV/
2
Appropriate values are set.
The polarity is reversed.
Normal.
Investigation results
The axis detachment function (NC
parameter) is invalid.
(Note) For the axis detachment
function, refer to the NC manual.
The axis detachment function (NC
parameter) is valid.
(Note) For the axis detachment
function, refer to the NC manual.
[1] The axis has moved.
[2] The servo OFF is applied during
the mode.
The axis has not moved.
The excessive error detection width is
too small.
SV026 ={RAPID/(60*PGN1)}/2
An appropriate value is set.
M700VS Series Setup Manual
Appendix 2.13 Troubleshooting
Remedies
[1] Lower the machine weight applied
to the servo motors (by the unbalance
torque).
[2] Lower the weight of the workpiece.
Investigate item 2.
Set appropriate values.
Investigate item 3.
Correctly set the parameters.
Investigate item 4.
Remedies
Check the investigation item No. 2.
Check the investigation item No. 3.
[1] Adjust the brakes, etc. so that the
axis does not move.
[2] Avoid the servo OFF from being
applied during position control.
Check the investigation item No. 3.
Set an appropriate value.
Check for problems on the NC side,
such as the position FB follow-up
control.
SV SP
SV SP
629
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Table of Contents
Troubleshooting
