Siemens SINUMERIK 840D sl Function Manual page 1872

Detailed Description
2.4 Tool radius compensation 2D (TRC)
2.4.9 Blocks with variable compensation value
Supplementary conditions
A variable compensation value is permissible for all types of interpolation (including circular
and spine interpolation).
It is also permitted to change the sign (and, therefore, the compensation side).
Figure 2-36
84
Tool radius compensation with variable compensation value
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0