HEIDENHAIN iTNC 530 (60642x-03) - Manual (Page 270)

270 Programming: Data transfer from DXF files or plain-language contours
7.
1 Pr
ocessing DXF files (sof
tw
ar
e
option)
7.1 Processing DXF files
(software option)
Application
DXF files created in a CAD system can be opened directly by the TNC,
in order to extract contours or machining positions, and save them as
conversational programs or as point files. Plain-language programs
acquired in this manner can also be run by older TNC controls, since
these contour programs contain only L and CC/C blocks.
If you process DXF files in the Programming and Editing operating
mode, the TNC generates contour programs with the file extension .H
and point files with the extension .PNT by default. If you process DXF
files in the smarT.NC operating mode, the TNC generates contour
programs with the file extension .HC and point files with the extension
.HP
by default. However, you can choose the desired file type in the
saving dialog. Furthermore, you can also save the selected contour or
the selected machining positions to the clipboard of the TNC and then
insert them directly in an NC program.
The DXF files to be processed must be stored on the hard
disk of your TNC.
Before loading the file to the TNC, ensure that the name
of the DXF file does not contain any blank spaces or illegal
special characters(see "File names" on page 118).
The DXF file to be opened must contain at least one layer.
The TNC supports the most common DXF format, R12
(equivalent to AC1009).
The TNC does not support binary DXF format. When
generating the DXF file from a CAD or drawing program,
make sure that you save the file in ASCII format.
The following DXF elements can be selected as contours:
 LINE (straight line)
 CIRCLE (complete circle)
 ARC (circular arc)
 POLYLINE