HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 45)

HEIDENHAIN TNC 426, TNC 430 33
3.1 Measur
ing W
o
rk
piece Misalignment
BASIC ROTATION over two studs (touch probe
cycle 402, ISO: G402)
The touch probe cycle 402 measures the centers of two studs. Then
the TNC calculates the angle between the reference axis in the
working plane and the line connecting the two stud 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 in rapid traverse
(value from MP6150 or MP6361) to the starting point for probing
the first stud
1 .
2 Then the probe moves to the entered measuring height 1 and
probes four points to find the center of the first stud. The touch
probe moves on a circular arc between the touch points, each of
which is offset by 90°.
3 The touch probe returns to the clearance height and then to the
starting point for probing
5 the second stud.
4 The TNC moves the touch probe to the entered measuring height
2 and probes four points to find the center of the second stud.
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.
X
Y
5
1