HEIDENHAIN TNC 620 User Manual page 183

Programming contours | Path contours – FK free contour programming (option 19)
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 NC blocks of an FK section.
Soft key Known data
Beginning of
contour:
End of contour:
Example
12 L X+5 Y+35 RL F500 M3
13 FC DR- R15 CLSD+ CCX+20 CCY+35
...
17 FC DR- R+15 CLSD-
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022
CLSD+
CLSD–
5
183