HEIDENHAIN TNC 320 User Manual page 390

16.8 MEASURE RECTANGLE
OUTSIDE (Cycle 424,
DIN/ISO: G424)
Cycle run
Touch Probe Cycle 424 finds the center, length and width of a
rectangular stud. 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 "Executing
touch probe cycles" on page 285) to the starting point 1. The TNC
calculates the touch points from the data in the cycle and the
safety clearance from the SET_UP column of the touch probe
table.
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 either paraxially at the measuring
height or linearly at the clearance height to the next starting point
2 and probes the second touch point.
4 The TNC positions the probe to starting point
point 4 to probe the third and fourth touch points.
5 Finally the TNC returns the touch probe to the clearance height and
saves the actual values and the deviations in the following
Q parameters:
Parameter number Meaning
Q151 Actual value of center in reference axis
Q152 Actual value of center in minor axis
Q154 Actual value of length in the reference
axis
Q155 Actual value of length in the minor axis
Q161 Deviation at center of reference axis
Q162 Deviation at center of minor axis
Q164 Deviation of side length in reference axis
Q165 Deviation of side length in minor axis
390
3 and then to starting
Touch Probe Cycles: Automatic Workpiece Inspection