HEIDENHAIN TNC 320 User Manual page 375

16.4 MEASURE ANGLE (Cycle 420,
DIN/ISO: G420)
Cycle run
Touch Probe Cycle 420 measures the angle that any straight surface
on the workpiece describes with respect to the reference axis of the
working plane.
1 The TNC positions the touch probe at rapid traverse (value from
FMAX column) following the positioning logic (see "Executing
touch probe cycles" on page 285) to the programmed starting
point 1. The TNC offsets the touch probe by the safety clearance
in the direction opposite the defined traverse direction.
2 Then the touch probe moves to the entered measuring height and
probes the first touch point at the probing feed rate (column F).
3 Then the touch probe moves to the next starting position
probes the second position.
4 The TNC returns the touch probe to the clearance height and saves
the measured angle in the following Q parameter:
Parameter number Meaning
Q150 The measured angle is referenced to the
reference axis of the machining plane.
Please note while programming:
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.
If touch probe axis = measuring axis, set Q263 equal to
Q265 if the angle about the A axis is to be measured; set
Q263 not equal to Q265 if the angle is to be measured about
the B axis.
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