Siemens SINUMERIK 840D sl Programming Manual page 486

Tool offsets
7.5 Activate 3D tool offsets (CUT3DC..., CUT3DF...)
Further information
Tool center point path with infeed up to the limitation surface CUT3DCCD
If a tool with a smaller radius than the appropriate standard tool is used, machining is
continued using a milling tool, which is infed in the longitudinal direction until it reaches the
bottom (base) of the pocket. The tool removes as much material from the corner formed by
the machining surface and limitation surface. This involves a machining type combining
circumferential and face milling. Analog to a tool with lower radius, for a tool with increased
radius, the infeed is in the opposite direction.
Contrary to all other tool offsets of G code group 22, tool parameter $TC_DP6 specified for
CUT3DCCD does not influence the tool radius and the resulting compensation.
The compensation offset is the sum of:
● The wear value of the tool radius (tool parameter $TC_DP15)
● and a tool offset OFFN programmed to calculate the perpendicular offset to the limitation
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surface.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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