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Measurement of shafts in the production process based on x-rays

Production metrology faces challenges connected to the production industry where consumers of products expect a standard of high quality at inexpensive costs. One approach for the next generation of production metrology devices aims at ensuring the quality of the process technologies in every single process step, therefore measuring in-process. One example of today's production metrology devices is the measurement of shafts in the production. Shafts are vital for every mechanical device that translates rotational energies and the tolerances based on diameter or roundness are in the range of microns. Those shaft measurement devices are either based on tactile measurements or on visible light which cannot be utilized as an in-process device. A novel idea is to use X-rays instead of tactile or visible light methods to be able to acquire robust measurement data despite of distorting debris like water, oil or dust. One focus is set on algorithms that allow robust measurements of diameter and roundness despite of distorting debris like water, oil or dust. The measurement uncertainty of the new method has been investigated and results will be introduced.