HEIDENHAIN TNC 320 (340 55x-03) Touch Probe Cycles - Manual (Page 130)

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3.3 A
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piece Measur
ement
MEASURE COORDINATE (touch probe cycle 427,
DIN/ISO: G427)
Touch probe cycle 427 finds a coordinate in a selectable axis and saves
the value in a system parameter. If you define the corresponding
tolerance values in the cycle, the TNC makes a nominal-to-actual value
comparison and saves the deviation value in system parameters.
1 The TNC positions the touch probe at rapid traverse (value from
FMAX column) following the positioning logic (see “Running touch
probe cycles” on page 21) to the starting point
1 . The TNC offsets
the touch probe by the safety clearance in the direction opposite
the defined traverse direction.
2 Then the TNC positions the touch probe to the entered touch point
1 in the working plane and measures the actual value in the
selected axis.
3 Finally the TNC returns the touch probe to the clearance height and
saves the measured coordinate in the following Q parameter: X
Z
1
Parameter number Meaning
Q160 Measured coordinate
Before programming, note the following
Before a cycle definition you must have programmed a
tool call to define the touch probe axis.