HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 70)

58 3 Touch Probe Cycles for Automatic Workpiece Inspection
3.2 A
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DATUM CIRCLE CENTER (touch probe cycle 416,
ISO: G416)
Touch probe cycle 416 finds the center of a bolt hole circle and defines
its center as datum. If desired, the TNC can also enter the coordinates
into a datum table.
1 Following the positioning logic (see “Running touch probe cycles”
on page 7), the TNC positions the touch probe at rapid traverse
(value from MP6150 or MP6361) to the point entered as 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
sets the datum at the measured center of the bolt hole circle, or
enters its coordinates in the active datum table.
1
3
2
Before programming, note the following:
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.