Tool Offset Compensation On The Path, Path Curvature, Insertion Depth (Cut3Dc, Isd) - Siemens SINUMERIK 840D sl Programming Manual

Tool offsets
7.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
7.5.4 3D tool offset Compensation on the path, path curvature, insertion depth
(CUT3DC, ISD)
Function
Compensation on path
With respect to face milling, it is advisable to examine what happens when the contact point
"jumps" on the tool surface as shown in the example on the right where a convex surface is
being machined with a vertically positioned tool. The application shown in the example
should be regarded as a borderline case.
This borderline case is monitored by the control that detects abrupt changes in the
machining point on the basis of angular approach motions between the tool and normal
surface vectors. The control inserts linear blocks at these positions so that the motion can be
executed.
These linear blocks are calculated on the basis of permissible angular ranges for the side
angle stored in the machine data. The system outputs an alarm if the limit values stored in
the machine data are violated.
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Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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