HEIDENHAIN TNC 320 User Manual page 295

14.3 BASIC ROTATION from Two
Holes (Cycle 401, DIN/ISO: G401)
Cycle run
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 hole centers. With the basic
rotation function, the TNC compensates the calculated value. As an
alternative, you can also compensate the determined misalignment by
rotating the rotary table.
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 Then the TNC returns the touch probe to the clearance height and
performs the basic rotation.
Please note while programming:
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.
If you want to compensate the misalignment by rotating
the rotary table, the TNC will automatically use the
following rotary axes:
C for tool axis Z
B for tool axis Y
A for tool axis X
HEIDENHAIN TNC 320 295