HEIDENHAIN iTNC 530 (60642x-04) ISO programming - Manual (Page 236)

236 Programming: Programming Contours
6.5
Pa
th
cont
ours—P
olar
coor
dinat
es
Circular path G16 with tangential connection
The tool moves on a circular path, starting tangentially from a
preceding contour element.
 Polar coordinates radius R : Distance from the arc
end point to the pole I, J
 Polar coordinates angle H : Angular position of the
arc end point
Example NC blocks
X
Y
40
35
CC
30°
120°
R30 R25
N120 I+40 J+35 *
N130 G01 G42 X+0 Y+35 F250 M3 *
N140 G11 R+25 H+120 *
N150 G16 R+30 H+30 *
N160 G01 Y+0 *
The pole is not the center of the contour arc!
16