Siemens SINUMERIK 840Di sl Programming Manual page 384

Tool offsets
8.12 Collision monitoring (CDON, CDOF, CDOF2)
Bottleneck detection
Since the tool radius selected is too wide to machine this inside contour, the "bottleneck" is
bypassed.
An alarm is output.
Contour path shorter than tool radius
The tool travels round the workpiece corner on a transition circle and then continues to
follow the programmed contour exactly.
384
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals