HEIDENHAIN iTNC 530 (340 49x-03) smarT.NC Pilot - Manual (Page 6)

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Programs/Files
The TNC keeps its programs, tables and texts in files. A file designation
consists of two components:
smarT.NC uses mainly three file types:
„ Unit programs (file type .HU)
Unit programs are conversational programs that contain two additional
structuring elements: The beginning (UNIT XXX) and the end (END OF
UNIT XXX)
of a machining step.
„ Contour descriptions (file type .HC)
Contour descriptions are conversational programs. They must only
contain path functions that can be used to describe a contour in the
machining plane. The following elements are permitted: L, C with CC,
CT
, CR, RND, CHF as well as the FPOL, FL, FLT, FC and FCT elements for FK
free contour programming
„ Point tables (file type .HP)
smarT.NC saves in point tables the machining positions that you
defined using the powerful pattern generator.
Files in the TNC Type
Programs
In HEIDENHAIN format
In ISO format
.H
.I
smarT.NC files
Structured unit program
Contour descriptions
Point tables for machining positions
.HU
.HC
.HP
Tables for
Tools
Tool changers
Pallets
Datums
Presets (reference points)
Cutting data
Cutting materials, workpiece materials
.T
.TCH
.P
.D
.PR
.CDT
.TAB
Texts as
ASCII files
Help files
.A
.CHM
Drawing data as
DXF files
.DXF
PROG20 .HU
File name File type
As a default, smarT.NC automatically saves all files in the
TNC:\smarTNC
directory. However, you can also select any
other directory.