Approaching On A Circular Path With Tangential Connection From A Straight Line To The Contour: Appr Lct - HEIDENHAIN TNC 620 User Manual

Programming contours | Approaching and departing a contour
Approaching on a circular path with tangential connection
from a straight line to the contour: APPR LCT
The tool moves on a straight line from the starting point P
an auxiliary point P . It then moves to the first contour point P
H
on a circular arc. The feed rate programmed in the APPR block
is effective for the entire path that the control traversed in the
approach block (path P to P
S
If you have programmed the coordinates of all three principal axes
X, Y and Z in the approach block, the control moves the tool from the
position defined before the APPR block to the auxiliary point P
three axes simultaneously. Then the control moves the tool from P
to P only in the working plane.
A
The arc is connected tangentially both to the line P
to the first contour element. Once these lines are known, the radius
then suffices to completely define the tool path.
Use any path function to approach the starting point P
Initiate the dialog with the APPR DEP key and APPR LCT soft
key:
Coordinates of the first contour point P
Radius R of the circular arc. Enter R as a positive
value
Radius compensation RR/RL for machining
Example
7 L X+40 Y+10 R0 FMAX M3
8 APPR LCT X+10 Y+20 Z-10 R10 RR F100
9 L X+20 Y+35
10 L ...
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022
).
A
- P
S
to
S
A
on all
H
H
as well as
H
.
S
A
Approach P without radius compensation
S
P with radius compensation RR, radius R 10
A
End point of the first contour element
Next contour element
5
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