HEIDENHAIN TNC 360 ISO Programming - Manual (Page 175)

8-22
8 Cycles
TNC 360
8.3 SL Cycles
Fig. 8.23: Overlapping islands: area of inclusion
A
B
.
.
.
.
.
.
Subprogram: Overlapping islands
An island always requires a pocket as an additional boundary (here,
G98 L1). A pocket can also reduce several island surfaces. The starting
point of this pocket must be inside the first island. The starting points of
the remaining intersecting island contours must lie outside the pocket.
%S822I G71 *
N10
G30 G17 X+0 Y+0 Z–20 *
N20 G31 X+100 Y+100 Z+0 *
N30 G99 T1 L+0 R+2.5 *
N40 T1 G17 S2500 *
N50 G37 P01 2 P02 3 P03 1 *
N60 G57 P01 –2 P02 –10 P03 –5 P04 100
P05 +0 P06 +0 P07 500 *
N70 G00 G40 G90 Z+100 M06 *
N80 X+50 Y+50 M03 *
N90 Z+2 M99 *
N100 Z+100 M02 *
N110 G98 L1 *
N120 G01 G41 X+5 Y+5 *
N130 X+95 *
N140 Y+95 *
N150 X+5 *
N160 Y+5 *
N170 G98 L0 *
N180 G98 L2 *
N210 G98 L0 *
N220 G98 L3 *
N250 G98 L0 *
N9999 %S822I G71 *
Area of inclusion
Elements A and B are to be left unmachined —
including the area of overlap:
• A and B must be islands.
• The first island must start outside the second
island.
N180 G98 L2 *
N190 G01 G42 X+10 Y+50 *
N200 I+35 Y+50 G03 X+10 Y+50 *
N210 G98 L0 *
N220 G98 L3 *
N230 G01 G42 X+90 Y+50 *
N240 I+65 J+50 G03 X+90 Y+50 *
N250 G98 L0 *
N9999 % S822 I G71
The supplements and subprograms are entered in the main program on page 8-22.