HEIDENHAIN TNC 620 Programming Station

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
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 RR/RL for machining
Example
7 L X+40 Y+10 R0 FMAX M3
Approach P
S
without radius compensation
8 APPR LT X+20 Y+20 Z-10 LEN15 RR F100
P
A
with radius compensation RR; distance P
H
to P
A
: LEN 15
9 L X+35 Y+35
End point of the first contour element
10 L ...
Next contour element
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 RR/RL for machining
Example
7 L X+40 Y+10 R0 FMAX M3
Approach P
S
without radius compensation
8 APPR LN X+10 Y+20 Z-10 LEN15 RR F100
P
A
with radius compensation RR; distance P
H
to P
A
: LEN 15
9 L X+20 Y+35
End point of the first contour element
10 L ...
Next contour element
5
HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022
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