HEIDENHAIN iTNC 530 (34049x-08) ISO programming - Manual (Page 231)

HEIDENHAIN iTNC 530 231
6.5 P
ath cont
ours—P
o
lar
c
oor
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
 Polar-coordinate angle H : Angular position of the arc
end point between –99 999.9999° and +99 999.9999°
 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 *
13