This report was produced as a part of the project EASYTRAC, an EU project under the
programme Competitive and Sustainable Growth: Contract No. G6RD-CT-2000-00188,
coordinated by UNIMETRIK S.A. (Spain). The project is concerned with low uncertainty
calibrations on coordinate measuring machines (CMMs).
For this project, the Centre for Geometrical Metrology (CGM) at the Technical University of
Denmark (DTU) has taken care of thread measurements, in collaboration with the Dipartimento
di Innovazione Meccanica e Gestionale (DIMEG) - University of Padova - Italy, Physikalisch-Technische
Bundesanstalt Braunschweig (PTB) - Germany and Tampere University of
Technology (TUT) - Finland.
The present report describes feasibility and experimental results of a reversal and substitute
element technique application for thread calibration on CMMs.