HEIDENHAIN TNC 410 - Manual (Page 88)

75 HEIDENHAIN TNC 410
Last contour element: P
E
with radius compensation
Coordinates P
N
, arc radius = 8 mm
Retract in Z, return to block 1, end program
X
Y
20
P
N
R0
P
E
RR
RR
12
10
R8
P
H
R0
Departing on a circular arc tangentially connecting
the contour and a straight line: DEP LCT
The tool moves on a circular arc from the last contour point P
E
to an
auxiliary point P
H
. It then moves from P
H
to the end point P
N
on a
straight line. The arc is tangentially connected both to the last
contour element and to the line from P
H
to P
N
. Once these lines are
known, the radius R then suffices to completely define the tool
path.
ú Program the last contour element with the end point P
E
and
radius compensation.
ú Initiate the dialog with the APPR/DEP key and DEP LCT soft key:
ú Enter the coordinates of the end point P
N
.
ú Radius R of the arc
Always enter R as a positive value
Example NC blocks
23 L Y+20 RR F100
24 DEP LCT X+10 Y+12 R8 F100
25 L Z+100 FMAX M2
6.3 Cont
our
Appr
oac
h and Depar
tu
re