Closed-Loop Control Gain (Clc_Gain) - Siemens SINUMERIK 840D sl Function Manual

TE1: Clearance control
11.6 Programming
In the case of a re-orientation (rotation) of the compensation vector, it is also necessary to
note the ratio between the programmed traversing path and the configured dynamic response
of the direction axes. The ratio should be chosen such that the programmed traversing path is
not traversed in one or a small number of interpolation cycles, due to the dynamic response of
the axis. This causes heavy loads on the machine and, in certain circumstances, may trigger
axial alarms and abort part program execution.
Example
Rotation of the compensation vector and thus the machining head through 90°:
• Initial orientation: Parallel to coordinate axis X
• Target orientation: Parallel to coordinate axis Y
Bad programming of re-orientation:
• [1, 0, 0] → [0, 1, 0]
Good programming of re-orientation:
• [100, 0, 0] → [0, 100, 0]
Rotation of the workpiece coordinate system
As described above, the compensation vector always refers to the basic coordinate system
(machine coordinate system). If the workpiece coordinate system (rotation, mirroring) is
transformed to machine a workpiece in such a way that the coordinate axes of both
coordinate systems are no longer parallel with the same orientation, a corresponding
transformation must be carried out for the compensation vector.
If the workpiece coordinate system is transformed such that the coordinate axes of the basic
and workpiece coordinate systems are no longer parallel with the same orientation, it is the
sole responsibility of the user to ensure that an appropriate transformation of the
compensation vector is carried out.
11.6.2

Closed-loop control gain (CLC_GAIN)

Syntax
CLC_GAIN =
Factor
• Format: Real
• Range of values: y 0.0
CLC_GAIN is an NC address and can therefore be written together with other instructions in a
part program block.
When a negative factor is programmed, the absolute value is used without an alarm output.
484
CAUTION
Factor
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions