HEIDENHAIN TNC 406 - Manual (Page 178)

HEIDENHAIN TNC 406, TNC 416 157
8.5 Coor
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T
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Working with datum tables
The TNC can store several datum tables. Depending on the
configuration of your machine tool, a new datum table includes four or
five axes.
Editing a datum table:
8 Press the PGM NAME or PGM MGT key in the PROGRAMMING
AND EDITING mode of operation.
8 Enter the name of the datum table.
The selected datum table appears on the screen. You can store the
coordinates for up to 999 datum points in this table. If necessary,
you can enlarge the table with the INSERT soft key, and enter the
desired datum number in column D.
The TNC writes the datum number and coordinates in the
Q parameters Q80 to Q85.
With the miscellaneous functions M38 and M39 you can write
coordinates to and from the active datum table. M38 and M39 allow
you to store any positions as datum points in the table 0.D (see also
”Q parameters for the datum table: Q81 to Q84” on page 206).
Depending on the setting of user parameter 7411, a datum shift in the
fourth axis will also result in a rotation (see also ”Selecting the General
User Parameters” on page 246).
If the tool axis is not the Z axis, C from the datum table will only result
in a shift, not a rotation.