Siemens SINUMERIK 840D sl Programming Manual page 760

Work preparation
3.13 Tool offsets
CUT3DFD:
G41/G42 X... Y... Z... :
A4/5=... B4/5=... C4/5=...:
ORIC/ORID:
G40 X... Y... Z... :
Note
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.
Examples
Example 1: 3D face milling with CUT3DF
Program code
N10
N20 $TC_DP1[1,1]=121
N30 $TC_DP3[1,1]=20
N40 $TC_DP6[1,1]=5
N50 $TC_DP7[1,1]=3
N60
N70
760
3D TRC in relation to a differential tool for face milling with
change in orientation (only with active 5-axis transformation)
The radius difference is specified by the tool parameter
$TC_DP15.
Note:
CUT3DFD is only possible in combination with "Smoothing of
surface normals in 3D face milling". This is activated by call‐
ing the "Top Surface" function (requires a license) via CY‐
CLE832(...).
Activate tool offset
The behavior with G41 and with G42 is identical for 3D face
milling.
Note:
The activation must be performed in a linear block (G0/G1).
Definition of the surface normals of the plane to be machined
A4=... B4=... C4=...: Definition at start of block
A5=... B5=... C5=...: Definition at end of block
The behavior for orientation changes at outside corners is
specified via the G commands ORIC and ORID.
Orientation changes at outside corners are su‐
ORIC:
perimposed on the circle block to be inserted.
Orientation changes are performed before the
ORID:
circle block.
Deactivate tool radius compensation
Note:
The deactivation must be performed in a linear block (G0/G1)
with geometry axis movements.
Comment
; Definition of tool D1:
; Tool type (toroidal miller)
; Length compensation
; Radius
; Rounding radius
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
NC programming