HEIDENHAIN TNC 320 User Manual page 403

16.12 MEASURE BOLT HOLE CIRCLE
(Cycle 430, DIN/ISO: G430)
Cycle run
Touch Probe Cycle 430 finds the center and diameter of a bolt hole
circle by probing three holes. If you define the corresponding tolerance
values in the cycle, the TNC makes a nominal-to-actual value
comparison and saves the deviation value in system parameters.
1 The TNC positions the touch probe at rapid traverse (value from
column FMAX) following the positioning logic (see "Executing
touch probe cycles" on page 285) to the center of the first hole 1.
2 Then the probe moves to the entered measuring height and
probes four points to find the first hole center.
3 The touch probe returns to the clearance height and then to the
position entered as center of the second hole 2.
4 The TNC moves the touch probe to the entered measuring height
and probes four points to find the second hole center.
5 The touch probe returns to the clearance height and then to the
position entered as center of the third hole 3.
6 The TNC moves the touch probe to the entered measuring height
and probes four points to find the third hole center.
7 Finally the TNC returns the touch probe to the clearance height and
saves the actual values and the deviations in the following
Q parameters:
Parameter number Meaning
Q151 Actual value of center in reference axis
Q152 Actual value of center in minor axis
Q153 Actual value of bolt hole circle diameter
Q161 Deviation at center of reference axis
Q162 Deviation at center of minor axis
Q163 Deviation of bolt hole circle diameter
Please note while programming:
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.
Cycle 430 only monitors for tool breakage; there is no
automatic tool compensation.
HEIDENHAIN TNC 320 403