External calculation mode

#DCC[CALL=EXTERNAL]

Calculating offsets and superimposing them on the axis positions can be executed in the methods of the TcCOM object.

The arrangement in the system of a 2-path configuration is shown below. The offset is superimposed in the CNC:

External calculation mode 1: — Dynamic Contour Control with implicit superimposition

Motion in the ACS system is calculated using a kinematic transformation. In addition to the default parameters, the orientation of the corrected geometry in the MCS is also specified for kinematic backward transformation.

The TcCOM object can be provided with a scaling factor by the PLC via the cyclical input.

Its arrangement in the system is shown below together with the superimposition of offsets in the TcCOM object of the kinematic transformation:

External calculation mode 2: — Dynamic Contour Control with explicit offset superimposition in the first kinematic step

	If the CNC is not required to superimpose Dynamic Contour Control offsets implicitly, the "CalculateOffset()" function must return offsets with the value 0. You can calculate and superimpose offsets in a TcCOM object of the "kinematic transformation" type.