Siemens SINUMERIK 840D sl Function Manual page 264

W5: 3D tool radius compensation
3.3 Programming
CUT3DCCD takes account of a limitation surface for a real differential tool that the programmed
standard tool would define. The NC program defines the center-point path of a standard tool.
CUT3DCC with the use of cylindrical tools takes account of a limitation surface that the
programmed standard tool would have reached. The NC program defines the contour on the
machining surface.
The surface normal vector of the limitation surface is specified with A4, B4, C4 and A5, B5, C5
for 3D face milling.
Syntax
G41/G42 CUT3DCCD/CUT3DCC CDOF2 X... Y... Z... A4=... B4=... C4=... A5=... B5=...
C5=...
...
G40 X... Y... Z...
Meaning
CUT3DCCD:
CUT3DCC:
G41/G42 X... Y... Z... :
CDOF2:
A4/5=... B4/5=...
C4/5=...:
G40 X... Y... Z... :
Note
The G commands for selecting the 3D TRC are evaluated in the approach block, i.e. typically
in the block that contains G41 or G42.
G41 or G42 can also be programmed in blocks without traversing movement in geometry axes
relevant for the compensation. In this case, the approach block is the first traversing block
following such a block.
A change of the 3D TRC variant with active tool radius compensation is ignored without alarm.
264
3D TRC for circumferential milling taking into account a limitation
surface with a differential tool on the tool center-point path: Infeed to
the limitation surface
3D TRC for circumferential milling taking into account a limitation
surface with 3D radius compensation: Contour on the machining
surface
Activate tool radius compensation
Tool radius compensation left of the contour
G41:
Tool radius compensation right of the contour
G42:
Note:
The activation must be performed in a linear block (G0/G1).
Deactivate collision detection for 3D circumferential milling
Definition of the surface normals of the limitation surface
A4=... B4=... C4=...:
A5=... B5=... C5=...:
Deactivate tool radius compensation
Note:
The deactivation must be performed in a linear block (G0/G1) with
geometry axis movements.
Definition at start of block
Definition at end of block
Function Manual, 06/2019, A5E47435126B AA
Tools