HEIDENHAIN TNC 620 (340 56x-02) ISO programming - Manual (Page 174)

174 Programming: Programming Contours
6.5 P
a
th Cont
ours—P
o
lar Coor
dinat
e
s
Circular path G12/G13/G15 around pole I, J
The polar coordinate radius R is also the radius of the arc. R is defined
by the distance from the starting point to the pole I, J. The last
programmed tool position will be the starting point of the arc.
Direction of rotation
„ In clockwise direction: G12
„ In counterclockwise direction: G13
„ Without programmed direction: G15. The TNC traverses the circular
arc with the last programmed direction of rotation
U Polar-coordinates angle H : Angular position
of the arc end point between –99 999.9999°
and +99 999.9999°
U Direction of rotation DR
Example NC blocks
X
Y
25
25
R20
CC
N180 I+25 J+25 *
N190 G11 G42 R+20 H+0 F250 M3 *
N200 G13 H+180 *