Circumferential Milling - Siemens SINUMERIK 840D sl Function Manual

W5: 3D tool radius compensation
3.1 Function
Parameterization
The machine and setting data set for the 2D-TRC are also in effect for the 3D-TRC.
Further information
W1: Tool offset (Page 19)
In addition to this, there is special system data that is only relevant to 3D-TRC. See Chapter
"Parameter assignment (Page 252)" regarding settings of this data.
Activation/deactivation
The selection of the 3D-TRC variant is made in the NC program via G commands of Group 22
(tool offset type). The actual activation and deactivation are done via the G commands of Group
7 (tool radius compensation).
See Section "Programming (Page 253)".
3.1.2

Circumferential milling

The 3D circumferential milling is used for machining contours with tools having an orientation
that is not constant during processing. Processing is done using the peripheral surface of the
tool. If the tool is cylindrical, ruled surfaces (e.g. cones, cylinders, etc.) are created during this
processing. Other forms of milling machines can also be used, however (e.g. form cutters). The
tool radius compensation needed for this type of processing is an extension of the conventional
2½D-TRC.
The ratios for 3D circumferential milling are shown in the following figure:
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Function Manual, 06/2019, A5E47435126B AA
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