HEIDENHAIN TNC 320 User Manual page 351

15.11 DATUM IN TOUCH PROBE AXIS
(Cycle 417, DIN/ISO: G417)
Cycle run
Touch Probe Cycle 417 measures any coordinate in the touch probe
axis and defines it as datum. If desired, the TNC can also enter the
measured coordinate in a datum table or preset table.
1 The TNC positions the touch probe at rapid traverse (value from
FMAX column) following the positioning logic (see "Executing
touch probe cycles" on page 285) to the programmed starting
point 1. The TNC offsets the touch probe by the safety clearance
in the positive direction of the touch probe axis.
2 Then the touch probe moves in its own axis to the coordinate
entered as touch point 1
simple probing movement.
3 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 314) and saves the actual values in the Q parameters
listed below.
Parameter number Meaning
Q160 Actual value of measured point
Please note while programming:
Before a cycle definition you must have programmed a
tool call to define the touch probe axis. The TNC then sets
the datum in this axis.
HEIDENHAIN TNC 320
and measures the actual position with a
351