Approaching On A Straight Line With Tangential Connection: Appr Lt; Approaching On A Straight Line Perpendicular To The First Contour Point: Appr Ln - HEIDENHAIN TNC 640 User Manual

Programming Contours | Approaching and departing a contour
Approaching on a straight line with tangential
connection: APPR LT
The tool moves on a straight line from the starting point P
auxiliary point P . It then moves to the first contour point P
H
straight line that connects tangentially to the contour. The auxiliary
point P is separated from the first contour point P
H
LEN.
Use any path function to approach the starting point P
Initiate the dialog with the APPR DEP key and APPR LT soft key
Coordinates of the first contour point P
LEN: Distance from the auxiliary point P
first contour point P
Radius compensation G41/G42 for machining
Example
N70 G00 X+40 Y+10 G40 M3*
N80 APPR LT X+20 Y+20 Z-10 LEN15 G42 F100*
N90 G01 X+35 Y+35*
N100 G01 ...*
Approaching on a straight line perpendicular to the
first contour point: APPR LN
Use any path function to approach the starting point P
Initiate the dialog with the APPR DEP key and APPR LN soft
key:
Coordinates of the first contour point P
Length: Distance to the auxiliary point P
Always enter LEN as a positive value
Radius compensation G41/G42 for machining
Example
N70 G00 X+40 Y+10 G40 M3*
N80 APPR LN X+10 Y+20 Z-10 LEN15 G24 F100*
N90 G01 X+20 Y+35*
N100 G01 ...*
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
to an
S
on a
A
by the distance
A
S
A
to the
H
A
Approach P
P with radius comp. G42, distance P
A
End point of the first contour element
Next contour element
.
S
A
.
H
Approach PS without radius compensation
PA with radius comp. G42
End point of the first contour element
Next contour element
without radius compensation
S
to P
H
7
R0=G40; RL=G41; RR=G42
: LEN=15
A
289