HEIDENHAIN TNC 620 (81760x-01) ISO programming - Manual (Page 195)

Approaching and departing a contour 6.3
6
TNC 620 | User's Manual for DIN/ISO Programming | 3/2014
195
Departing in a straight line with tangential
connection:
DEP LT
The tool moves on a straight line from the last contour point P
E
to
the end point P
N
. The line lies on the extension of the last contour
element. P
N
is separated from P
E
by the distance LEN.
Program the last contour element with the end point P
E
and
radius compensation
Initiate the dialog with the
APPR/DEP key and DEP LT soft key:
LEN: Enter the distance from the last contour
element P
E
to the end point P
N
.
Departing in a straight line perpendicular to the last
contour point:
DEP LN
The tool moves on a straight line from the last contour point P
E
to
the end point P
N
. The line departs on a perpendicular path from the
last contour point P
E
. P
N
is separated from P
E
by the distance LEN
plus the tool radius.
Program the last contour element with the end point P
E
and
radius compensation
Initiate the dialog with the
APPR/DEP key and DEP LN soft key:
LEN: Enter the distance of the end point P
N
.
Remember: always enter LEN as a positive value!
Departing 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 circular arc connects tangentially to the last
contour element.
Program the last contour element with the end point P
E
and
radius 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 opposite to the radius compensation:
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.