HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 43)

HEIDENHAIN TNC 426, TNC 430 31
3.1 Measur
ing W
o
rk
piece Misalignment
BASIC ROTATION from two holes (touch probe
cycle 401, ISO: G401)
The touch probe cycle 401 measures the centers of two holes. Then
the TNC calculates the angle between the reference axis in the
working plane and the line connecting the two hole centers. With the
basic rotation function the TNC compensates the calculated value
(See also “Compensating Workpiece Misalignment” on page 18).
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 Then the TNC returns the touch probe to the clearance height and
performs the basic rotation.
Before programming, note the following:
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.
The TNC will reset an active basic rotation at the beginning
of the cycle.
2
1