Siemens SINUMERIK 840D sl Programming Manual page 763

Program code
N23 X-248.07130 Y30.15119 Z8.71082
A5=-.060165696 B5=.971048883 C5=-.231179920
A3=-.214177198 B3=.926684940 C3=-.308841625
N24 X-248.07829 Y29.97126 Z8.05094
A5=-.059884286 B5=.968941717 C5=-.239928784
A3=-.213318480 B3=.923853466 C3=-.317789237
N25 X-248.08317 Y29.78487 Z7.38844
A5=-.059584206 B5=.966718449 C5=-.248807482
A3=-.212397895 B3=.920898045 C3=-.326854594
N26 X-248.08578 Y29.59254 Z6.72679
A5=-.059263963 B5=.964380907 C5=-.257793037
A3=-.211418355 B3=.917822366 C3=-.336012474
...
Note
For 3D face milling with CUT3DFD, the definition of the surface normal is required for activating
the tool offset with G41/G42. Programming of G41/G42 without definition of the surface
normals leads to the output of an alarm.
See also
CYCLE832 - High-Speed Settings (Page 1107)
Further information
3D face milling
For this type of 3D milling, you require the line-by-line description of the 3D paths on the
workpiece surface. The tool shape and dimensions are taken into account in the calculations,
which are normally performed in CAM. The postprocessor writes to the part program - in
addition to NC blocks - the tool orientations (for active 5-axis transformation) and the G
command for the required 3D tool offset. This means that the machine operator has the
possibility of using tools that are slightly smaller - deviating from the tool used to calculate the
NC paths.
Figure 3-10
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Face milling
Comment
Work preparation
3.13 Tool offsets
763