HEIDENHAIN TNC 620 (73498x-01) ISO programming - Manual (Page 356)

356 Manual operation and setup
13.4 D
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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 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.