216 Programming: Programming Contours
6.3 Contour Approach and Departure
Departure on a circular path with tangential
connection: DEP CT
The tool moves on a circular arc from the last contour point P
E
to the
end point P
N
. The path is tangentially connected to the last contour
element.
U Program the last contour element with the end point P
E
and radius
compensation
U Initiate the dialog with the APPR/DEP key and DEP CT soft key:
U Center angle CCA of the arc
U Radius R of the circular arc
îš„ 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
îš„ If the tool should depart the workpiece in the
direction opposite to the radius compensation:
Enter R as a negative value
Example NC blocks
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
E
to an
auxiliary point P
H
. It then moves on a straight line to the end point P
N
.
The arc is tangentially connected both to the last contour element and
to the line from P
H
to P
N
. The radius R uniquely defines the arc.
U Program the last contour element with the end point P
E
and radius
compensation
U Initiate the dialog with the APPR/DEP key and DEP LCT soft key:
U Enter the coordinates of the end point P
N
U Radius R of the circular arc. Enter R as a positive value
Example NC blocks
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