HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 306)

306 Manual operation and setup
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Setting the datum using multiple holes/cylindrical studs
A second soft-key row provides a soft key for using multiple holes or
cylindrical studs to set the datum. You can set the intersection of two
or more elements as datum.
Select the probing function for the intersection of holes/cylindrical
studs:
 Select the probing function: Press the PROBING CC
soft key
 Hole is to be probed automatically: Define by soft key
 Circular stud is to be probed automatically: Define by
soft key
Preposition the touch probe approximately in the center of the hole or
near the first touch point of the circular stud. After you have pressed
the NC Start key, the TNC automatically probes the points on the
circle.
Move the touch probe to the next hole, repeat the probing operation
and have the TNC repeat the probing procedure until all the holes have
been probed to set the datum.
Setting the datum in the intersection of multiple holes:
 Preposition the touch probe approximately in the
center of the hole
 Hole is to be probed automatically: Define by soft key
 Start the probing procedure: Press the machine
START button. The touch probe probes the circle
automatically.
 Repeat the probing procedure for the remaining
elements
 Terminate the probing procedure and switch to the
evaluation menu: Press the EVALUATE soft key
 Datum : In the menu window, enter both coordinates of
the circle center, confirm with the SET DATUM soft
key, or write the values to a table (see "Writing the
measured values from touch probe cycles to datum
tables", page 295, or see "Writing the measured
values from touch probe cycles to the preset table",
page 296)
 Terminate the probing function: Press the END soft
key