HEIDENHAIN TNC 620 User Manual page 422

13
Manual operation and setup
13.4 Datum setting without a 3-D touch probe
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:
Through probing cycles in the Manual Operation or El.
Handwheel modes (see Chapter 14)
Through the probing cycles 400 to 402 and 410 to 419 in
automatic mode (see User's Manual, Cycles, Chapters 14 and
15)
Manual entry (see description below)
Basic rotations from the preset table rotate the
coordinate system about the preset, which is shown
in the same line as the basic rotation.
Remember to ensure that the position of the tilting
axes matches the corresponding values of the 3-D
ROT menu when setting the datum. Therefore:
If the "Tilt working plane" function is not active,
the position display for the rotary axes must be =
0° (zero the rotary axes if necessary).
If the "Tilt working plane" function is active, the
position displays for the rotary axes must match
the angles entered in the 3-D ROT menu.
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.
422
TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013