Measurement Results In Q Parameters; Classification Of Results; Tolerance Monitoring - HEIDENHAIN TNC 640 User Manual

Touch Probe Cycles: Automatic Workpiece Inspection | Fundamentals

Measurement results in Q parameters

The TNC saves the measurement results of the respective touch
probe cycle in the globally effective Q parameters Q150 to Q160.
Deviations from the nominal value are saved in the parameters
Q161 to Q166. Note the table of result parameters listed with
every cycle description.
During cycle definition the TNC also shows the result parameters
for the respective cycle in a help graphic (see figure at upper right).
The highlighted result parameter belongs to that input parameter.

Classification of results

For some cycles you can inquire the status of measuring results
through the globally effective Q parameters Q180 to Q182.
Class of results
Measurement results are within tolerance
Rework is required
Scrap
The TNC sets the rework or scrap marker as soon as one of the
measuring values falls outside of tolerance. To determine which
of the measuring results lies outside of tolerance, check the
measuring log, or compare the respective measuring results (Q150
to Q160) with their limit values.
In Cycle 427 the TNC assumes that you are measuring an outside
dimension (stud). However, you can correct the status of the
measurement by entering the correct maximum and minimum
dimension together with the probing direction.
The TNC also sets the status markers if you have not
defined any tolerance values or maximum/minimum
dimensions.

Tolerance monitoring

For most of the cycles for workpiece inspection you can have the
TNC perform tolerance monitoring. This requires that you define
the necessary limit values during cycle definition. If you do not
wish to monitor for tolerances, simply leave the 0 (the default
value) in the monitoring parameters.
HEIDENHAIN | User's manual for cycle programming | 10/2017
Parameter value
Q180 = 1
Q181 = 1
Q182 = 1
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