Siemens Sinumerik 840D sl Programming Manual page 285

Tool length compensation
The tool length compensation generally always refers to the fixed, non-rotated working plane.
2D tool radius compensation with contour tools
The tool radius compensation for contour tools is used for automatic cutting-edge selection in
the case of non-axially symmetrical tools that can be used for piece-by-piece machining of
individual contour segments.
Syntax
CUT2D
CUT2DF
2D tool radius compensation for contour tools is activated if either of the two machining
directions G41 or G42 is programmed with CUT2D or CUT2DF.
Note
If tool radius compensation is not activated, a contour tool will behave like a standard tool with
only the first cutting edge.
Meaning
CUT2D:
CUT2DF:
CUT2D is used when the orientation of the tool cannot be changed and the workpiece is rotated
for machining on inclined surfaces.
CUT2D is generally the standard setting and does not, therefore, have to be specified explicitly.
Cutting-edge selection with contour tools
Up to a maximum of twelve cutting edges can be assigned to each contour tool in any order.
Machine manufacturer
The valid tool types for non-axially symmetrical tools and the maximum number of cutting
edges (Dn = D1 to D12) are defined by the machine manufacturer via machine data. Please
contact the machine manufacturer if not all of the 12 cutting edges are available.
Further information
Tool radius compensation, CUT2D
As for many applications, tool length compensation and tool radius compensation are
calculated in the fixed working plane specified with G17 to G19.
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Activate 2 1/2 D radius compensation (default)
Activate 2 1/2 D radius compensation, tool radius compensation relative to the current
frame or to inclined planes
Tool radius compensation
11.6 2D tool compensation (CUT2D, CUT2DF)
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