HEIDENHAIN TNC 320 (77185x-01) ISO programming - Manual (Page 189)

Approaching and departing a contour 6.3
6
TNC 320 | User's Manual for DIN/ISO Programming | 3/2014
189
Approaching on a straight line with tangential
connection:
APPR LT
The tool moves on a straight line from the starting point P
S
to
an auxiliary point P
H
. It then moves to the first contour point P
A
on a straight line that connects tangentially to the contour. The
auxiliary point P
H
is separated from the first contour point P
A
by the
distance LEN.
Use any path function to approach the starting point P
S
.
Initiate the dialog with the APPR/DEP key and APPR LT soft key:
Coordinates of the first contour point P
A
LEN: Distance from the auxiliary point P
H
to the
first contour point P
A
Radius compensation G41/G42 for machining
Approaching on a straight line perpendicular to the
first contour point:
APPR LN
Use any path function to approach the starting point P
S
.
Initiate the dialog with the APPR/DEP key and APPR LN soft key:
Coordinates of the first contour point P
A
Length: Distance to the auxiliary point P
H
. Always
enter LEN as a positive value!
Radius compensation G41/G42 for machining