HEIDENHAIN ITNC 530 User Manual page 212

Departure on a circular path with tangential
connection: DEP CT
The tool moves on a straight line from the last contour point P
end point P . The arc is tangentially connected to the last contour
N
element.
Program the last contour element with the end point P
compensation.
Initiate the dialog with the APPR/DEP key and DEP CT soft key:
Center angle CCA of the arc
Radius R of the circular arc
If the tool should depart the workpiece in the
direction of the radius compensation (i.e. to the
right with RR or to the left with RL): Enter R as a
positive value.
If the tool should depart the workpiece in the
direction opposite to the radius compensation:
Enter R as a negative value.
Example NC blocks
23 L Y+20 RR F100
24 DEP CT CCA 180 R+8 F100
25 L Z+100 FMAX M2
Departing on a circular arc tangentially
connecting the contour and a straight line:
DEP LCT
The tool moves on a circular arc from the last contour point P
auxiliary point P . It then moves on a straight line to the end point P
H
The arc is tangentially connected both to the last contour element and
to the line from P to P . Once these lines are known, the radius R
H N
then suffices to completely define the tool path.
Program the last contour element with the end point P
compensation.
Initiate the dialog with the APPR/DEP key and DEP LCT soft key:
Enter the coordinates of the end point P
Radius R of the circular arc. Enter R as a positive value.
Example NC blocks
23 L Y+20 RR F100
24 DEP LCT X+10 Y+12 R+8 F100
25 L Z+100 FMAX M2
212
Y
to the
E
20
and radius
E
Last contour element: P
Center angle=180°,
arc radius=8 mm
Retract in Z, return to block 1, end program
Y
to an
S
.
N
20
12
and radius
E
.
N
Last contour element: P
Coordinates P
Retract in Z, return to block 1, end program
RR
P
N
R0
P
E
180°
RR
with radius compensation
E
RR
P
E
RR
P
H
P
N
R0
R0
10
with radius compensation
E
, arc radius=8 mm
N
6 Programming: Programming Contours
X
X