HEIDENHAIN TNC 320 (77185x-01) Cycle programming - Manual (Page 298)

Touch Probe Cycles: Automatic Measurement of Workpiece
Misalignment
14.4 BASIC ROTATION over two studs (Cycle 402, DIN/ISO: G402)
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TNC 320 | User's Manual Cycle Programming | 3/2014
14.4 BASIC ROTATION over two studs
(Cycle 402, DIN/ISO: G402)
Cycle run
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. As an alternative, you can also compensate the
determined misalignment by rotating the rotary table.
1 Following the positioning logic, the TNC positions the touch
probe at rapid traverse (value from FMAX column) (see
"Executing touch probe cycles", page 286) to touch point
1 of
the first stud.
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
positions the probe to starting point
5
of the second stud.
4 The probe moves 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.
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