HEIDENHAIN TNC 128 (77184x-02) - Manual (Page 288)

Manual operation and setup
11.4 Datum setting without a 3-D touch probe
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TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014
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
Operation 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\.
There are several methods for saving datums and/or basic rotations
in the preset table:
Via touch probe cycles in the
Manual Operation and El.
Handwheel modes
Manual entry (see description below)
The line 0 in the preset table is write protected. In
line 0, the TNC always saves the datum that you
most recently set manually via the axis keys or via
soft key. If the datum set manually is active, the TNC
displays the text
PR MAN(0) in the status display.