Datum Management With The Preset Table - HEIDENHAIN ITNC 530 User Manual

Datum management with the preset 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 tilted working
plan function
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.
Saving the datums in the preset table
The preset table has the name PRESET.PR, and is saved in the directory
TNC:\. PRESET.PR is editable only in the Manual and Electronic
Handwheel modes. In the Programming and Editing mode you can only
read the table, not edit it.
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:\.
68 2 Manual Operation and Setup