Optimization Of The Control; Position Controller, Position Setpoint Filter: Balancing Filter - Siemens SINUMERIK 840D sl Function Manual

G2: Velocities, setpoint / actual value systems, closed-loop control

7.6 Optimization of the control

Tapping, thread cutting
For tapping or thread cutting, the following applies with regard to the parameter sets of axes:
● For machine axes that are not involved in tapping or thread cutting, parameter set 1 (index
= 0) is active. The other parameter sets do not have to be taken into account.
● For machine axes that are involved in tapping or thread cutting, the same parameter set
number as that of the current gear stage of the spindle is active.
All parameter sets correspond to the gear stages and must therefore be parameterized.
The current parameter set is displayed on the user interface at:
"Operating area switchover" > "Diagnostics" > "Service axis"
Parameter sets during gear stage change
Each gear stage of a spindle is assigned a separate parameter set. The gear stage is selected
via the following NC/PLC interface signal:
DB31, ... DBX16.0 - 16.2 = <actual gear stage>
For further information on gear stages for spindles, see Section "S1: Spindles (Page 1199)".
7.6 Optimization of the control
7.6.1

Position controller, position setpoint filter: Balancing filter

Function
With feedforward control active, the position setpoint is sent through a socalled balancing filter
before it reaches the controller itself. It is thus possible to control the speed setpoint to 100%
in advance, without resulting in overshoots when positioning.
Activation
The feedforward control variant is selected and so also the filter activated using the axis-
specific machine data:
362
Actual gear stage
1. Gear stage
1. Gear stage
2. Gear stage
3. Gear stage
4. Gear stage
5. Gear stage
DB31, ... DBX16.0 - 16.2
000
001
010
011
100
101
110
111
Parameter set
2
2
3
4
5
6
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
(Index=1)
(Index=1)
(Index=2)
(Index=3)
(Index=4)
(Index=5)
Basic Functions