HEIDENHAIN iTNC 530 (340 49x-01) ISO programming - Manual (Page 398)

398 8 Programming: Cycles
8.9
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DATUM SETTING (Cycle G247)
With the Cycle DATUM SETTING, you can activate a datum defined in
a preset table as the new datum.
Effect
After a DATUM SETTING cycle definition, all of the coordinate inputs
and datum shifts (absolute and incremental) are referenced to the new
preset.
8 Number for datum?: Enter the number of the datum to
be activated from the preset table
Status displays
In the status display the TNC shows the active preset number behind
the datum symbol
Example: NC block
N13 G247 DATUM SETTING
Q339=4 ;DATUM NUMBER
Z
Z
X
X
Y
Y
When activating a datum from the preset table, the TNC
resets all coordinate transformations that were activated
with the following cycles:
„ Cycle G53/G54, Datum Shift
„ Cycle G28, Mirroring
„ Cycle G73, Rotation
„ Cycle G72, Scaling
However, the coordinate transformation from Cycle G80,
Tilted Working Plane, remains active.
The TNC sets the preset only in the axes that are defined
with values in the preset table. The datums of axes
marked with – remain unchanged.
If you activate preset number 0 (line 0), then you activate
the datum that you last set by hand in a manual operating
mode.
Cycle G247 is not functional in Test Run mode.