HEIDENHAIN TNC 620 (340 56x-01) - Manual (Page 178)

178
6.6 P
a
th Cont
ours—FK F
ree Cont
our Pr
ogr
amming (Sof
tw
ar
e Option)
6.6 Path Contours—FK Free
Contour Programming
(Software Option)
Fundamentals
Workpiece drawings that are not dimensioned for NC often contain
unconventional coordinate data that cannot be entered with the gray
path function keys. You may, for example, have only the following data
on a specific contour element:
„ Known coordinates on the contour element or in its proximity
„ Coordinate data that are referenced to another contour element
„ Directional data and data regarding the course of the contour
You can enter such dimensional data directly by using the FK free
contour programming function (Advanced programming features
software option). The TNC derives the contour from the known
coordinate data and supports the programming dialog with the
interactive programming graphics. The figure at upper right shows a
workpiece drawing for which FK programming is the most convenient
programming method.
Y
X
0 5 10 20
88.15°
¬36
45°
¬21
18
R4
28
R2.5