HEIDENHAIN TNC 410 - Manual (Page 110)

97 HEIDENHAIN TNC 410
Relative data
Data whose values are based on another contour element are
called relative data. The soft keys are available as soon as you
initiate the FK dialog with the FL or FLT soft key.
The block number of the contour element on which the
relative data are based can only be located up to 64
positioning blocks before the block in which you program
the reference.
If you delete a block on which relative data are based, the
TNC will display an error message. Change the program
first before you clear this message.
Relative data for a free-programmed straight line Soft key
Straight line parallel to another contour element
Distance from a straight line to a parallel
contour element
Example NC blocks
The known direction and the known distance from the contour
element are relative to block N (see figure at top right):
17 FL LEN20 AN+15
18 FL AN+105 LEN12.5
19 FL PAR17 DP12.5
20 FSELECT 2
21 FL LEN20 IAN+95
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 block of an FK section.
6.6 P
ath Cont
ours — FK F
ree Cont
our Pr
ogr
amming
X
Y
CLSD+
CLSD–
X
Y
105°
12.5
12.5
95°
220°
15°
20
20