HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 207)

HEIDENHAIN TNC 640 207
6.5 P
a
th Cont
ours—P
o
lar Coor
dinat
e
s
Circular path CTP with tangential connection
The tool moves on a circular path, starting tangentially from a
preceding contour element.
U Polar coordinate radius PR : Enter the distance from
are end point to the pole CC
U Polar coordinates angle PA : Angular position of the
arc end point
Example NC blocks
X
Y
40
35
CC
30°
120°
R30 R25
12 CC X+40 Y+35
13 L X+0 Y+35 RL F250 M3
14 LP PR+25 PA+120
15 CTP PR+30 PA+30
16 L Y+0
The pole is not the center of the contour arc!