Siemens SINUMERIK 840D sl Programming Manual page 488

Tool offsets
7.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
The tool actually being used may either be larger or smaller than the standard tool. However,
the resulting corner radius must not be negative and the sign of the resulting tool radius must
be kept.
For CUT3DCC, the NC part program refers to contour on the machining surface. As for
conventional tool radius compensation, the total tool radius is used that comprises the sum
of:
● Tool radius (tool parameter $TC_DP6)
● Wear value (tool parameter $TC_DP15)
● and a tool offset OFFN programmed to calculate the perpendicular offset to the limitation
The position of the limitation surface is determined from the difference between these two
values:
● Dimensions of the standard tool
● Tool radius (tool parameter $TC_DP6)
488
surface.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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