In the framework of the development of high field magnets made of Nb3Sn superconductor for projects like HL-LHC and FCC studies, it is needed to refine the understanding of the winding process and its impact of the overall mechanical integrity of the conductor. The mechanical behaviour during winding of the unreacted Rutherford type Nb3Sn cables has been studied experimentally. In order to quantify the windability of the various cable designs the measurement method and a dedicated specimen scanning device has been developed. The validation of the device and achieved repeatability are presented. The first obtained test results for cables for HL-LHC, 11 T dipole RRP®, 11 T dipole PIT and MQXF are shown.