Logo of the Physikalisch-Technische Bundesanstalt

Research project

Development of procedures for capability tests of measuring instruments for micro gear measurement

Period of the project

Start:  July 2011
End:   December 2013


Description of the project

It is the main objective of the present research project to make a uniform and unambiguous instrument for the assessment and selection of suitable measurement technology available to the manufacturers of micro gears or micro drives. This is achieved by the provision of calibrated measurement standards. In addition, evaluation strategies must be developed which allow tactile and optical measuring systems to be compared with each other.

Figure: Range of micro gears

Within the scope of the project, micro gear measurement standards are designed and manufactured which are similar to the product. They allow industry to realize a practice orientated quantitative assessment of the measurement technology. The most important characteristics comprise: high form stability, resistance to corrosion and simple manageability. The developed clamping devices for the different instrument types allow a deformation-resistant and reproducible fixation of the measurement standards. With the developed procedures, the micro gear measurement standards are calibrated and are then available for comparison measurements. The investigations and assessments comprise measuring instruments with tactile and optical sensors as well as computertomographic procedures. For comparison of the linear and laminar measuring principles, corresponding evaluation strategies must be developed.

Another issue of the project is the integration of a microprobe into a gear measuring instrument. Here it is aimed at achieving, in the ideal case, probe diameters of approx. 100 µm. For the probe, measuring strategies must be developed and first measurements be carried out on micro gear measurement standards.

Project partners

Forschungsvereinigung für Antriebstechnik, Arbeitskreis Messtechnik


Dipl.-Ing. Vaclava Dunovska and Dr.-Ing. Karin Kniel