Mitsubishi Electric MDS-E Series Instruction Manual page 370

MDS-E/EH Series Instruction Manual
6 Spindle Adjustment
[3] Select "Synchronous tapping error measurement" on NC Analyzer, and perform synchronous tapping
operations with the operation pattern 2 above.
*The following measurement data of servo and spindle are automatically set when "Synchronous tapping error
measurement" is selected.
[4] Check the waveform and adjust the synchronous tapping time constant so that the margin for current limit at
acceleration/deceleration is 50% or more.
Margin for current limit at
acceleration has to be
50% or more.
(2) Accuracy test using NC Analyzer
[1] Perform synchronous tapping operations using the time constant determined in (1) above.
[2] Check the synchronous tapping accuracy (for both operation pattern 1 and 2) by using the synchronous
tapping accuracy check tool.
[3] If the number of error pulse is 100 (p-p) or less, satisfactory accuracy is secured, and the check is completed.
[4] If the number of error pulse exceeds 100, increase SP008 (VGN2) by 10 increments, and adjust so that the
error pulse is 100 or less. Note that the maximum setting value is 150 × [inertia ratio].
< NC Analyzer setting (Time-series data measurement) >
Get
CH1 Synchronous tapping error *Position error of spindle and servo axis
CH2 Speed feed back of servo
CH3 Speed feed back of spindle
CH4 Current feed back of servo
CH5 Current feed back of spindle
3000r/min
0
0
Current limit level
Output waveform example during synchronized tapping
Waveform type
Speed feed back
(CH3: Speed feed back of spindle)
Margin for current limit at
deceleration has to be 50% or more.
Current feed back
(CH5: Current feed back of spindle)
Current limit level
339
Error pulse display
IB-1501229-F