HEIDENHAIN TNC 620 (81760x-01) Cycle programming - Manual (Page 368)

Touch Probe Cycles: Automatic Datum Setting
15.13 DATUM IN ONE AXIS (Cycle 419, DIN/ISO: G419, software option
17)
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TNC 620 | User's Manual Cycle Programming | 3/2014
Traverse direction 1 Q267: Direction in which the
probe is to approach the workpiece:
-1 : Negative Traverse direction
+1
: Positive traverse direction
Datum number in table Q305: Enter the number
in the datum or preset table in which the TNC is
to save the coordinate. If you enter Q305=0, the
TNC automatically sets the display so that the new
datum is on the probed surface. Input range 0 to
2999
New datum Q333 (absolute): Coordinate at which
the TNC should set the datum. Default setting = 0
input range -99999.9999 to 99999.9999
Measured-value transfer (0, 1) Q303: Specify
whether the determined datum is to be saved in the
datum table or in the preset table:
-1
: Do not use! Is entered by the TNC when old
programs are read in (see "Characteristics common
to all touch probe cycles for datum setting",
page 322)
0 : Write determined datum in the active datum
table. The reference system is the active workpiece
coordinate system
1 : Write the measured datum into the preset table.
The reference system is the machine coordinate
system (REF system).