HEIDENHAIN TNC 406 - Manual (Page 133)

112 6 Programming: Programming Contours
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.
8 Polar coordinates radius PR: Distance from the arc
end point to the pole CC
8 Polar coordinates angle PA: Angular position of the
arc end point
Example NC blocks
12 CC X+40 Y+35
13 L X+0 Y+35 RL F M
14 LP PR+25 PA+120 R F M
15 CTP PR+30 PA+30 R F M
16 L Y+0 R F M
The pole CC is not the center of the contour arc!
X
Y
40
35
CC
30°
120°
R30 R25