Measurement for the identification of static and quasi-static rotational stiffness

Machine tool calibration can be employed to optimise path trajectories through on- and off-line compensation of anticipated deflections, which result from a process plan, assess the machine tools capability comply with geometric dimensions tolerances plan. This work presents measurement for identification static quasi-static rotational stiffness joint 5-axis machining centres. shall serve as basis towards translational well The novelty this lies partly in procedure stiffness, relies on multiple circular trajectories, comparison tools, is usually identified using finite element approaches. consists inducing load directly, an overhead factory crane, single measuring its deflection both three LVDTsLinear Variable Differential Transformers (LVDTs) Non-Contact Capacitive Probes (NCCPs). While induces loads indirectly Loaded Double Ball Bar, different magnitudes radii axis rotation, between centre point table. measures LVDTs NCCPs while spindle tracks inscribed by movement rotary axis. procedures are implemented two case studies centres significantly kinematic configurations able highlight discuss limitations applicability method. presented method works symmetric acceptably asymmetric structures due corresponding symmetry field. Finally, manuscript concludes contextualisation introduced fully calibrated models, i.e. translation rotation dynamic, together customised post-processors might form future volumetric system.