Siemens SINUMERIK 840D sl Function Manual page 1867

2.4.7 Compensation at inside corners
Intersection
If two consecutive blocks form an inside corner, an attempt is made to find a point at which
the two equidistant paths intersect. If an intersection is found, the programmed contour is
shortened to the intersection (first block shortened at end, second block shortened at
beginning).
Figure 2-32
No intersection
In certain cases, no intersection is found between two consecutive blocks for inside corners
(see figure below).
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Example of a shortened contour
Detailed Description
2.4 Tool radius compensation 2D (TRC)
79