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MDS-D2/DH2 Series Instruction Manual
4.3 Setting the Initial Parameters for the Spindle Drive Unit
<Spindle synchronization multi-step acceleration/deceleration control parameter>
The acceleration/deceleration control can be set up to eight steps in spindle synchronization control to carry out an
optimal acceleration/deceleration control in accordance with the spindle motor characteristics whose output torque
steps down when exceeding the base rotation speed and further attenuate in output stepdown zone.
For 2nd step or subsequent steps, the specification allows to set the time constant magnification and changeover
rotation speed based on the acceleration/deceleration setting of the 1st step.
Set the value of limit rotation speed or higher as the changeover rotation speed for the step not to be shifted when
not carrying out a step shift.
4000
6000
8000
sptc7=9200
sptc6=8200
sptc5=7200
sptc4=6000
sptc3=4800
sptc2=3000
sptc1=1000
0
spt=400
slimit1=10000
1200(=spt * spdiv1 = 400 * 3)
2000(=spt * spdiv2 = 400 * 5)
2800(=spt * spdiv3 = 400 * 7)
4000(=spt * spdiv4 = 400 * 10)
5600(=spt * spdiv5 = 400 * 14)
8000(=spt * spdiv6 = 400 * 20)
11200(=spt * spdiv7 = 400 * 28)
0
2000
3000
4000
1000
10000
2000
Time [ms]
Spindle rotation speed [r/min]