Clearance Control; Control Dynamics - Siemens SINUMERIK 840D sl Function Manual

1D/ 3D machining
Clearance control can be used for 1D and 3D machining with up to five interpolatory axes.
● 1D machining
For the 1D machining, only one axis is affected by the clearance control. For example, axis
Z, as shown in the machine configuration described in the system overview (see previous
figure). Clearance control acts only in the direction of the Z axis.
● 3D machining
3 linear axes are used to position the tool. One or two rotary axes are used for the orientation
of the tool vector (5-axis machining). Up to 3 linear axes are controlled by the clearance
control. The direction of the compensation movement can be defined either in the direction:
– of the tool orientation vector (normal case)
– of the programmable compensation vector
15.2

Clearance control

15.2.1

Control dynamics

Control loop gain K
V
The dynamic response of the closed control loop (sensor - open-loop control - axis) is
determined by the maximum closed-loop control gain K
The closed-loop control gain K
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
is defined as:
V
TE1: Clearance control - 840D sl only
15.2 Clearance control
.
V
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