NCK start-up
10.5 Parameterize axis data
CNC Part 1 (NCK, PLC, drive)
Commissioning Manual, 11/2006, 6FC5397-2AP10-2BA0
127
If DSC operation is switched ON or OFF, it might be necessary to adjust the following
machine data:
• MD32200 POSCRTL_GAIN (K
V
factor)
• MD32610 VELO_FFW_WEIGHT (feedforward control factor)
• MD32810 EQUIV_SPEEDCTRL_TIME (substitute time const. of the closed speed control
loop).
Notice
Before you can switch off DSC operation you might have to adapt (reduce) the K
V
factor
of the axis. Otherwise, instability of the position control loop might result.
Speed setpoint filter
If you use DSC, a speed setpoint filter for rounding the speed setpoint steps is no longer
necessary. The speed setpoint filter is then only of any use with differential connection to
support the position controller, for example, to suppress resonance.
Measuring system
DSC is only possible in conjunction with the motor measuring system.
Machine data
Table 10-13 DSC: Machine data
Number Identifier Name Reference
Axisspecific ($MA_ ... )
32640 STIFFNESS_CONTROL_ENABLE Dyn. stiffness control DD2
32200 POSCRTL_GAIN K
V
factor G2
32642 STIFFNESS_CONTROL_CONFIG The dynamic stiffness control is configured.
0->standard case: DSC in drive operates with
indirect measuring system
1->DSC in the drive operates using direct
measuring system
DD2
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