Table of Contents
Advertisement
Departing tangentially on a circular arc: DEP CT
The tool moves on a circular arc from the last contour point P
the end point P
. The arc is tangentially connected to the last
N
contour element.
Program the last contour element with the end point P
radius compensation.
Initiate the dialog with the APPR/DEP key and DEP CT soft key:
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 on the
direction opposite to the radius compensation:
Enter R as a negative value.
Center angle CCA of the arc
Example NC blocks
23
Y+20 RR F100
24 DEP CT CCA 180 R+8 F100
25
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
H
N
R then suffices to completely define the tool path.
Program the last contour element with the end point P
radius 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 arc
Always enter R as a positive value
Example NC blocks
23
Y+20 RR F100
24 DEP
CT X+10 Y+12 R+8 F100
25
Z+100 FMAX M2
HEIDENHAIN TNC 426 B, TNC 430
www.EngineeringBooksPdf.com
Y
to
E
and
E
20
Last contour element: P
Center angle=180°, arc radius=10 mm
Retract in Z, return to block 1, end program
Y
to an
E
.
N
20
and
E
12
.
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 = 10 mm
N
X
X
101
Advertisement
Table of Contents
