Relative Data - HEIDENHAIN ITNC 530 User Manual

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 Relative. 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
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
HEIDENHAIN iTNC 530
Soft keys
Y
20
45°
20°
10
FPOL
10
90°
X
35
243