HEIDENHAIN TNC 620 (73498x-01) - Manual (Page 196)

196 Programming: Programming contours
6.5 P
a
th cont
ours—P
olar coor
dinat
e
s
Circular path CP around pole CC
The polar coordinate radius PR is also the radius of the arc. PR is defined
by the distance from the starting point to the pole CC. The last
programmed tool position will be the starting point of the arc.
U Polar-coordinates angle PA : Angular position of the
arc end point between –99 999.9999° and
+99 999.9999°
U Direction of rotation DR
Example NC blocks
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
25
25
R20
CC
18 CC X+25 Y+25
19 LP PR+20 PA+0 RR F250 M3
20 CP PA+180 DR+
For incremental coordinates, enter the same sign for DR
and PA.
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!