Siemens SINUMERIK 840D sl Programming Manual page 520

Tool offsets
7.11 Cutting data modification for tools that can be rotated (CUTMOD)
Program code
N190 $TC_CARR13[2]=30
N200 TCARR=2
N210 X0 Y0 Z0
N220 G42 Z–10
N230 Z–20
N240 X10
N250 G40 X20 Z0
N260 CUTMOD=2 X0 Y0 Z0
N270 G42 Z–10
N280 Z–20
N290 X10
N300 G40 X20 Z0
N310 M30
Explanations:
In blockN180, initially the tool is selected for CUTMOD=0 and non-rotated toolholders that can
be orientated. As all offset vectors of the toolholder that can be orientated are 0, the position
that corresponds to the tool lengths specified in $TC_DP3[1,1] and $TC_DP4[1,1] is
approached.
The toolholder that can be orientated with a rotation of 30° around the B axis is activated in
block N200. As the tool nose position is not modified due to CUTMOD=0, the old tool nose
reference point is decisive just as before. This is the reason that in block N210 the position is
approached, which keeps the old tool nose reference point at the zero (i.e. the vector (1, 12)
is rotated through 30° in the Z/X plane).
In block N260, contrary to block N200 CUTMOD=2 is effective. As a result of the rotation of
the toolholder that can be orientated, the modified tool nose position becomes 8. The
consequence of this is also the different axis positions.
The tool radius compensation (TRC) is activated in blocks N220 and/or N270. The different
tool nose positions in both program sections has no effect on the end positions of the blocks
in which the TRC is active; the corresponding positions are therefore identical. The different
tool nose positions only become effective again in the deselect blocks N260 and/or N300.
520
Comments
; 10.892 0.000
; 8.696 0.000
; 8.696 0.000
; 12.696 0.000
; 30.892 0.000
; 8.696 0.000
; 8.696 0.000
; 8.696 0.000
; 12.696 0.000
; 28.696 0.000
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
-5.134
–17.330
–21.330
–21.330
–5.134
–7.330
–17.330
–21.330
–21.330
–7.330
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