Siemens SINUMERIK 840D sl Function Manual page 68

W1: Tool offset
2.5 2D tool radius compensation
● Because of G341, the approach movement takes place with a circle in the plane, resulting
in a start point at (20, -20, 0)
● Because DISCL=5, point P2 is at position (20, -20, 5) and, because of Z30, point P1 is
in N10 at (20, -20, 30)
Figure 2-12
Part program:
Program code
$TC_DP1[1,1]=120
$TC_DP6[1,1]=10
N10 G0 X0 Y0 Z30
N20 G247 G341 G42 NORM D1 T1 Z0 FAD=1000 F=2000 DISCL=5 DISR=10
N30 X40
N40 X100
N50 Y-30
...
Example 2
The following conditions must be true for approach:
● Smooth approach is activated in block N20
● Approach movement performed with quadrant (G247)
● Approach direction not programmed, G140 is valid, i.e. because TRC is active (G41), the
contour is approached from the left
● Contour offset OFFN=5 (N10)
● Current tool radius=10, and so the effective compensation radius for TRC=15; the radius of
the SAR contour is thus equal to 25, with the result that the radius of the tool center path is
equal to DISR=10
68
Contour example 1
Comment
; Tool definition T1/D1
; Radius
Function Manual, 06/2019, A5E47435126B AA
Tools