HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 104)

92 3 Touch Probe Cycles for Automatic Workpiece Inspection
3.3 A
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matic W
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piece Measur
ement
MEASURE COORDINATE (touch probe cycle 427,
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 to the starting points at rapid
traverse (value from MP6150 or MP6361) following the positioning
logic (see “Running touch probe cycles” on page 7) 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:
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.