HEIDENHAIN TNC 620 (81760x-02) ISO programming - Manual (Page 243)

Path contours – FK free contour programming (option 19) 6.6
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TNC 620 | User's ManualDIN/ISO Programming | 2/2015
243
Closed contours
You can identify the beginning and end of a closed contour with the
CLSD soft key. This reduces the number of possible solutions for
the last contour element.
Enter
CLSD as an addition to another contour data entry in the first
and last blocks of an FK section.
Beginning of
contour:
CLSD+
End of contour: CLSD–
Example NC blocks
N10 G01 X+5 Y+35 G41 F500 M3
N20 FC DR- R15 CLSD+ CCX+20 CCY+35
...
N30 FCT DR- R+15 CLSD-