HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 169)

HEIDENHAIN TNC iTNC 530 169
6
.3 Con
tou
r A
ppr
oa
c
h
and
Dep
a
rt
ur
e
End point
The end point should be selected so that it is:
n
Approachable without danger of collision
n Near to the last contour point
n In order to make sure the contour will not be damaged, the optimal
ending point should lie on the extended tool path for machining the
last contour element.
Example
Figure at upper right: If you set the ending point in the dark gray area,
the contour will be damaged when the end point is approached.
Depart the end point in the spindle axis:
Program the departure from the end point in the spindle axis
separately. See figure at center right.
Example NC blocks
N50 G00 G40 X+60 Y+70 *
N60 Z+250 *
X
Y
A
E
Y
X
Z
E