HEIDENHAIN TNC 640 User Manual page 739

Manual Operation and Setup | Managing presets
17.5 Managing presets
Note
It is essential that you use the preset table in the
following cases:
If your machine is equipped with rotary axes (tilting
table or swivel head) and you work with the Tilt
working plane function
If your machine is equipped with a spindle-head
changing system
If up to now you have been working with older
controls with REF-based datum tables
You wish to machine several identical workpieces
that are aligned differently
The preset table can contain any number of rows (presets). To
optimize the file size and the processing speed, only use as many
rows as you need to manage your presets.
For safety reasons, new rows can be inserted only at the end of
the preset table.
Presets and pallet reference points
If you work with pallets, please note that the presets stored in the
preset table are relative to an activated pallet reference point.
Further information: "Pallet Management", page 651
Saving presets in the table
Refer to your machine manual.
The machine tool builder can disable presetting in
individual axes.
The preset table has the name PRESET.PR, and is saved
in the TNC:\table\ directory. PRESET.PR is editable in the
Manual operation and Electronic handwheel modes only if
the CHANGE PRESET soft key was pressed. You can open the
PRESET.PR preset table in the Programming operating mode but
not edit it.
Copying the preset table into another directory (for data backup)
is permitted. Write-protected rows are also write-protected in the
copied tables.
Never change the number of rows in the copied tables! If you want
to reactivate the table, this may lead to problems.
To activate the preset table copied to another directory you have to
copy it back to the TNC:\table\ directory
HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
17
739