HEIDENHAIN ITNC 530 User Manual page 209

Approaching on a circular path with tangential
connection: APPR CT
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
a circular arc that is tangential to the first contour element.
The arc from P to P is determined through the radius R and the
H A
center angle CCA. The direction of rotation of the circular arc is
automatically derived from the tool path for the first contour element.
Use any path function to approach the starting point P
Initiate the dialog with the APPR/DEP key and APPR CT soft key:
Coordinates of the first contour point P
Radius R of the circular arc
If the tool should approach the workpiece in the
direction defined by the radius compensation: Enter
R as a positive value.
If the tool should approach the workpiece opposite
to the radius compensation:
Enter R as a negative value.
Center angle CCA of the arc
CCA can be entered only as a positive value.
Maximum input value 360°
Radius compensation RR/RL for machining
Example NC blocks
7 L X+40 Y+10 RO FMAX M3
8 APPR CT X+10 Y+20 Z-10 CCA180 R+10 RR F100
9 L X+20 Y+35
10 L ...
HEIDENHAIN iTNC 530
Y
35
to an
S
following
A
20
10
.
S
A
Approach P
P with radius comp. RR, radius R=10
A
End point of the first contour element
Next contour element
P
A
RR
CCA=
180°
P
H
RR
10
20
without radius compensation
S
P
S
R0
X
40
209