HEIDENHAIN TNC 640 (34059x-05) ISO programming - Manual (Page 215)

Approaching and departing a contour 6.3
6
TNC 640 | User's ManualDIN/ISO Programming | 1/2015
215
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
Example NC blocks
N70 G00 X+40 Y+10 G40 M3 Approach PS without radius compensation
N80 APPR LN X+10 Y+20 Z-10 LEN15 G24 F100 PA with radius comp. G42
N90 G01 X+20 Y+35 End point of the first contour element
N100 G01 ... Next contour element