HEIDENHAIN TNC 426, User Manual

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124 5 Programming: Tools
5.5 W
o
rk
ing with Cut
ting D
a
ta T
a
bles
Working with automatic speed/feed rate
calculation
1 If it has not already been entered, enter the type of workpiece
material in the file WMAT.TAB
2 If it has not already been entered, enter the type of cutting material
in the file TMAT.TAB.
3 If not already entered, enter all of the required tool-specific data in
the tool table:
n
Tool radius
n
Number of teeth
n
Tool type
n
Tool material
n
The cutting data table for each tool
4 If not already entered, enter the cutting data in any cutting data
table (CDT file).
5 Test Run operating mode: Activate the tool table from which the
TNC is to take the tool-specific data (status S).
6 In the NC program, set the workpiece material by pressing the
WMAT soft key.
7 In the NC program, let the TOOL CALL block automatically
calculate spindle speed and feed rate via soft key.
Changing the table structure
Cutting data tables constitute so-called “freely-definable tables” for
the TNC. You can change the format of freely definable tables by using
the structure editor.
Calling the structure editor
Press the EDIT FORMAT soft key (2nd soft-key level). The TNC opens
the editing window (see figure at right), in which the table structure is
shown “rotated by 90°.” In other words, a line in the editing window
defines a column in the associated table. The meanings of the
structure commands (header entries) are shown in the table at right.
The TNC can process up to 200 characters per line and up
to 30 column.
If you insert an additional column into an existing table,
the TNC does not automatically shift the values that have
been entered.