HEIDENHAIN TNC 320 (340 55x-03) Touch Probe Cycles - Manual (Page 77)

HEIDENHAIN TNC 320 77
3.2 Pr
eset
ting aut
o
matically
4 The TNC positions the probe to starting point 3 and then to starting
point 4 to probe the third and fourth touch points.
5 Finally the TNC returns the touch probe to the clearance height and
processes the determined datum depending on the cycle
parameters Q303 and Q305 (see “Saving the calculated datum”
on page 64) and saves the actual values in the Q parameters listed
below
6 If desired, the TNC subsequently measures the datum in the touch
probe axis in a separate probing.
Parameter number Meaning
Q151 Actual value of center in reference axis
Q152 Actual value of center in minor axis
Q153 Actual value of diameter
Before programming, note the following
To prevent a collision between the touch probe and the
workpiece, enter a low estimate for the nominal diameter
of the pocket (or hole).
If the dimensions of the pocket and the safety clearance
do not permit pre-positioning in the proximity of the touch
points, the TNC always starts probing from the center of
the pocket. In this case the touch probe does not return to
the clearance height between the four measuring points.
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.