HEIDENHAIN TNC 620 Programming Station, User Manual

Page: 281 / 695

Path contours – FK free contour programming (option 19) 6.6
6
HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
281
Relative data
Relative data are values based on another contour element. The
soft keys and program words for relative entries begin with the
letter
R . The figure on the right shows the dimensional data 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
N10 FPOL X+10 Y+10*
N20 FL PR+20 PA+20*
N30 FL AN+45*
N40 FCT IX+20 DR- R20 CCA+90 RX 20*
N50 FL IPR+35 PA+0 RPR 20*