HEIDENHAIN TNC 426 B, User Manual

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85 HEIDENHAIN TNC 426 B, TNC 430
Table for workpiece materials
Workpiece materials are defined in the table WMAT.TAB
(see figure at center right). WMAT.TAB is stored in the TNC:\
directory and can contain as many materials as you want. The name
of the material type can have a max. of 32 characters (including
spaces). The TNC displays the contents of the NAME column when
you are defining the workpiece material in the program (see the
following section).
If you change the standard workpiece material table, you
must copy it into a new directory. Otherwise your
changes will be overwritten during a software update by
the HEIDENHAIN standard data. Define the path in the
TNC.SYS file with the code word WMAT= (see
”Configuration File TNC.SYS” later in this chapter).
To avoid losing data, save the WMAT.TAB file at regular
intervals.
Defining the workpiece material in the NC program
In the NC program select the workpiece material from the
WMAT.TAB table using the WMAT soft key:
ú
Program the workpiece material: In the Programming
and Editing operating mode, press the WMAT soft key.
ú
The WMAT.TAB table is superimposed: Press the
SELECT WORKPIECE MATERIAL soft key and the TNC
displays in a second window the list of materials that
are stored in the WMAT.TAB table.
ú
Select your workpiece material by using the arrow
keys to move the highlight onto the material you wish
to select and confirming with the ENT key. The TNC
transfers the selected material to the WMAT block. To
scroll through the table more quickly, press and hold
SHIFT and then the arrow keys. The TNC then moves
page by page.
ú
To terminate the dialog, press the END key.
If you change the WMAT block in a program, the TNC
outputs a warning. Check whether the cutting data
stored in the TOOL CALL block are still valid.
5.5 W
o
rking with Cut
ting D
ata T
ables
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