Measurement of Positions by the AOI
The system to be examined is prepared by the technical support and the corresponding program is loaded.
Then the glass measuring plate is transported into the AOI system and analyzed.
At the end of the measurement the results are exported in a suitable format.
The measuring plate must be transported out of the machine and reloaded.
Then a new measuring cycle starts.
This is typically repeated 4-10 times.
This completes the measurements for the 0° orientation and the process is repeated for another orientation, e.g. 180°.
Analysis of the Results
After the measurement acquisition is completed, the data is exported from the AOI into an ASCII readable format.
They must be transformed so that it fits the import format of our statistics software CmCStat.
Once the transformation is complete, the data is imported and analyzed.
This analysis focuses on both accuracy over a single measurement and repeatability over all.
Possible differences between the different orientations are another aspect of the analysis.
Use of the Results to Optimize the Accuracy
As a result of the data analysis, the machine is evaluated with regard to its specification.
In many cases, it is possible to derive necessary corrective measures to optimize the accuracy.
In the simplest case, this can be, for example, the recommendation to carry out a calibration with OEM tools on the system.
If mechanical causes are the reason for a failure to meet the specification, the measurement results can be used to narrow down the problems.
This makes it easier for the manufacturers service department to find the fault.
After corrections have been made, their effectiveness is checked with a further measurement.
Depending on the result, further measures may be necessary, followed by verification measurements.
Based on the final condition reached, a test report is written at the end of the evaluation.
This is usually written in our office within a few days after a customer visit.
Besides the detailed description of the final results, it contains the history of the necessary steps to reach the final condition.