Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 162

Investigation items
8 Check the spindle
synchronization time
constant of the spindle
parameter.
9 Check the spindle
parameter (SP010:
PGS) setting value.
10 Check the spindle
parameter (SP177 to
SP190, SP257 and
following) setting
values.
11 If the alarm occurs
during synchronous
tap, check the spindle
parameter (SP193:
SPECT) bit5 setting
value.
12 Check the spindle
parameter
synchronous tap time
constant.
13 Check the spindle
parameter (SP009:
PGT) setting value.
14 Check the spindle
parameter (SP193 to
SP222, SP257 and
following) setting
values.
The tracking error amount (droop amount) can be calculated using the following equation.
This alarm will occur if this value exceeds the setting value of each excessive error width.
Droop amount (No. of pulses) =
(∗1) The No. of pulses per rotation is 4096.
11. Troubleshooting
Investigation results
The trouble is eliminated by
increasing the setting value.
The trouble is not eliminated by
increasing the setting value.
The trouble is eliminated by
increasing the setting value.
The trouble is not eliminated by
increasing the setting value.
The correct values are not set.
No particular problem.
The trouble is eliminated by
changing the bit5 setting value.
The trouble is not eliminated by
changing the bit5 setting value.
The trouble is eliminated by
increasing the setting value.
The trouble is not eliminated by
increasing the setting value.
The trouble is eliminated by
increasing the setting value.
The trouble is not eliminated by
increasing the setting value.
The correct values are not set.
No particular problem.
{Spindle speed (rpm)/60} × No. of pulses per rotation (∗1)
11 − 18
Reconsider and change the setting
value.
Return the setting to the original
value. Investigate item 9, and carry
out the appropriate measures.
Change the setting value.
Return the setting to the original
value. Investigate item 10, and carry
out the appropriate measures.
Set the correct values.
Replace the unit, or readjust/replace
the position detector.
Change the bit5 setting value.
Return bit5 to the original setting
value. Investigate item 12, and carry
out the appropriate measures.
Reconsider and change the setting
value.
Return the setting to the original
value. Investigate item 13, and carry
out the appropriate measures.
Change the setting value.
Return the setting to the original
value. Investigate item 14, and carry
out the appropriate measures.
Set the correct values.
Replace the unit, or readjust/replace
the position detector.
Position loop gain (sec
Remedy
-1
)