Measure Hole Outside (Cycle 422, Din/Iso: G422, Software Option 17); Cycle Run; Please Note While Programming - HEIDENHAIN TNC 620 User Manual

16
Touch Probe Cycles: Automatic Workpiece Inspection
16.6 MEASURE HOLE OUTSIDE (Cycle 422, DIN/ISO: G422, software
option 17)
16.6 MEASURE HOLE OUTSIDE (Cycle 422,
DIN/ISO: G422, software option 17)

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 294) 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
4
starting point
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

Please note while programming:

Before a cycle definition you must have programmed
a tool call to define the touch probe axis.
The smaller the angle, the less accurately the TNC
can calculate the dimensions of the stud. Minimum
input value: 5°
388
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
TNC 620 | User's Manual Cycle Programming | 3/2014