HEIDENHAIN iTNC 530 (340 49x-04) - Manual (Page 254)

254 6 Programming: Programming Contours
6.4 P
a
th Cont
ours—Car
te
sian Coor
dinat
e
s
Circular path C around circle center CC
Before programming a circular path C, you must first enter the circle
center CC. The last programmed tool position before the C block is
used as the circle starting point.
 Move the tool to the circle starting point.
 Coordinates of the circle center
 Coordinates of the arc end point
 Direction of rotation DR, and if necessary:
 Feed rate F
 Miscellaneous function M
Example NC blocks
Full circle
For the end point, enter the same point that you used for the starting
point.
S E
X
Y
CC
X
Y
25 45
25
CC
DR+
DR–
The TNC normally makes circular movements in the active
working plane. If you program circular arcs that do not lie
in the active working plane, for example C Z... X... DR+
with a tool axis Z, and at the same time rotate this
movement, then the TNC moves the tool in a spatial
circular arc, which means a circular arc in 3 axes.
5 CC X+25 Y+25
6 L X+45 Y+25 RR F200 M3
7 C X+45 Y+25 DR+
The starting and end points of the arc must lie on the
circle.
Input tolerance: up to 0.016 mm (selected with MP7431).
Smallest possible circle that the TNC can traverse:
0.0016 µm.