Siemens SINUMERIK 840DE Programming Manual page 356

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.
8-60
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals