Siemens sinumerik 808d Programming And Operating Manual page 145

When entering the tool clearance angle, note that this depends on the machining type
'longitudinal' or 'face'. If you want to use one tool for longitudinal and face machining, two
tool compensations must be used in the case of different tool clearance angles.
The cycle will check whether or not the programmed contour can be machined using the
selected tool.
If the machining is not possible using this tool, the cycle will abort and an error message is
output (in stock removal); or alternatively, the contour is continued to be machined and a
message is output (with undercut cycles). In this case, the contour is determined by the
cutting edge geometry.
If the tool clearance angle is specified with zero in the tool compensation, this monitoring will
not be performed. For details on the reactions, please refer to the individual cycles.
Planar contour monitoring:
Turning Part 2: Programming (Siemens instructions)
Programming and Operating Manual, 05/2012, 6FC5398-5DP10-0BA0
Cycles
2.5 Turning cycles
145