HEIDENHAIN TNC 320 (340 55x-04) - Manual (Page 171)

HEIDENHAIN TNC 320 171
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 arc, you must first enter the circle
center CC. The last programmed tool position will be the starting point
of the arc.
U Move the tool to the circle starting point.
U Enter the coordinates of the circle center
U Enter the coordinates of the arc end point, and if
necessary:
U Direction of rotation DR
U Feed rate F
U 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 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 through the
circleDeviation
machine parameter).
Smallest possible circle that the TNC can traverse:
0.0016 µm.