HEIDENHAIN TNC 620 (340 56x-02) - Manual (Page 372)

372 Manual Operation and Setup
12.4 D
a
tum Set
ting without a 3-D T
o
uc
h Pr
obe
Datum management with the preset table
Saving the datums in the preset table
The preset table has the name PRESET.PR, and is saved in the directory
TNC:\table.
PRESET.PR is editable in the Manual and El. Handwheel
modes only if the CHANGE PRESET soft key was pressed.
It is permitted to copy the preset table into another directory (for data
backup). Lines that were written by your machine tool builder are also
always write-protected in the copied tables. You therefore cannot edit
them.
Never change the number of lines in the copied tables! That could
cause problems when you want to reactivate the table.
To activate the preset table copied to another directory you have to
copy it back to the directory TNC:\table\.
You should definitely use the preset table if:
„ Your machine is equipped with rotary axes (tilting table
or swivel head) and you work with the function for tilting
the working plane
„ Your machine is equipped with a spindle-head changing
system
„ Up to now you have been working with older TNC
controls with REF-based datum tables
„ You wish to machine identical workpieces that are
differently aligned
The preset table can contain any number of lines
(datums). To optimize the file size and the processing
speed, you should use only as many lines as you need for
datum management.
For safety reasons, new lines can be inserted only at the
end of the preset table.