Siemens SINUMERIK 840D sl Function Manual page 69

● The end point of the circle is obtained from N30, since only the Z position is programmed
in N20
● Infeed movement
– From Z20 to Z7 (DISCL=AC(7)) with rapid traverse
– Then on to Z0 with FAD=200
– Approach circle in X-Y-plane and following blocks with F1500
The following conditions must be true for retraction:
● Smooth retraction is activated in block N60
● Retraction movement performed with quadrant (G248) and helix (G340)
● FAD not programmed, since irrelevant for G340
● Z=2 in the start point; Z=8 in the end point, since DISCL=6
● When DISR=5, the radius of SAR contour=20; that of the tool center point path=5
● After the circle block, the retraction movement leads from Z8 to Z20 and the movement is
parallel to the XY plane up to the end point at X70 Y0
Figure 2-13
Part program:
Program code
$TC_DP1[1,1]=120
$TC_DP6[1,1]=10
N10 G0 X0 Y0 Z20 G64 D1 T1 OFFN = 5
N20 G41 G247 G341 Z0 DISCL = AC(7) DISR = 10 F1500 FAD=200
N30 G1 X30 Y-10
N40 X40 Z2
N50 X50
N60 G248 G340 X70 Y0 Z20 DISCL = 6 DISR = 5 G40 F10000
N70 X80 Y0
Tools
Function Manual, 06/2019, A5E47435126B AA
(In order that this velocity becomes effective in the following blocks, the active G-code G0
in N30 must be overwritten with G1. Otherwise, the contour would continue to be
machined with G0.)
Contour example 2
W1: Tool offset
2.5 2D tool radius compensation
Comment
; Tool definition T1/D1
; Radius
; (P0app)
; (P3app)
; (P4app)
; (P4ret)
; (P3ret)
; (P0ret)
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