Measure Hole Outside (Cycle 422, Din/Iso: G422); Cycle Run - HEIDENHAIN TNC 640 User Manual

16
Touch Probe Cycles: Automatic Workpiece Inspection | MEASURE HOLE OUTSIDE (Cycle 422, DIN/ISO:
16.6 MEASURE HOLE OUTSIDE (Cycle 422,
DIN/ISO: G422)

Cycle run

Touch Probe Cycle 422 measures the center and diameter of a
circular 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 Following the positioning logic, the TNC positions the touch
probe at rapid traverse (value from FMAX column) (See
"Executing touch probe cycles", page 497) to touch 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 runs the first probing process at the probing feed rate
(column F). The TNC derives the probing direction automatically
from the programmed starting angle.
3 Then the touch probe moves in a circular arc either at measuring
height or at clearance height to the next starting point
probes the second touch point.
4 The TNC positions the probe to starting point
starting point 4
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
Q151
Q152
Q153
Q161
Q162
Q163
600
to probe the third and fourth touch points.
Meaning
Actual value of center in reference axis
Actual value of center in minor axis
Actual value of diameter
Deviation at center of reference axis
Deviation at center of minor axis
Deviation from diameter
2 and
3 and then to
HEIDENHAIN | User's manual for cycle programming | 10/2017
G422)