Mitsubishi MELDAS MDS-C1 Instruction Manual page 245

(3) Adjusting the multi-step acceleration/deceleration time constants
1) Measure the acceleration/deceleration waveform to the spindle's maximum rotation speed
using S command operation. (No. 1 spindle, No. 2 spindle)
10000
Speed FB
(r/min)
0
Example of spindle acceleration/deceleration waveform
2) Calculate the multi-step acceleration/deceleration pattern based on the acceleration/
deceleration waveform for the spindle with a long acceleration/deceleration time.
10000
Speed FB
(r/min)
0
Calculation of multi-step acceleration/deceleration
3) Set the actual acceleration/deceleration time constant in the parameters while maintaining a
50% margin from each time constant calculated in step (2).
10000
Speed FB
(r/min)
0
Setting the multi-step acceleration/deceleration parameters
4) Try spindle synchronous acceleration/deceleration operation with the actual machine, and
confirm that the speed is accelerated or decelerated at 50% or less of the load meter value. If
the load meter value exceeds 50%, adjust the time constant again.
5. Spindle Adjustment
4-step
3-step
2-step
1-step
Maintaining a 50% margin
5 - 35
Time
Time
Time