HEIDENHAIN TNC 620 (81760x-02) - Manual (Page 247)

Path contours – FK free contour programming (option 19) 6.6
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TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 2/2015 247
Relative data
Data whose values are based on another contour element are
called relative data. The soft keys and program words for entries
begin with the letter
R
for
R
elative. The figure at right shows the
entries that should be programmed as relative data.
The coordinates and angles for relative data are
always programmed in incremental dimensions. You
must also enter the block number of the contour
element on which the data are based.
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 delete the
block.
Data relative to block N: End point coordinates
Soft keys Known data
Cartesian coordinates relative to block N
Polar coordinates relative to block N
Example NC blocks
12 FPOL X+10 Y+10
13 FL PR+20 PA+20
14 FL AN+45
15 FCT IX+20 DR- R20 CCA+90 RX 13
16 FL IPR+35 PA+0 RPR 13