July 2016
·
61 Reads
·
1 Citation
Recent interest in portable coordinate measuring systems (CMS) has attracted the attention of industrial users and the technical community at large. Articulated-arm CMM and Optically-Tracked CMM (OTCMM) systems have emerged from being nice-to-have to must-have 3D equipment on the shop floor. Portability and flexibility for in-process product measurements and verification are displacing more traditional methods that require fixed gantries, especially when OTCMM are combined with tracking devices that can compensate for the vibration levels of a typical shop floor. The current set of recognized contact CMS standards produced by ISO, VDI, ASME organisations cover fixed-gantry CMM. However, these standards cover one class of OTCMM i.e. laser trackers and neglect the class of OTCMM that include spherical-stylus touch probe tracked by contrast targets-based optical triangulation methods. It is within this context that we propose a harmonisation scheme for terminology, discuss test methods complemented with experimental data, and reference artefacts for the purpose of ensuring comparability of CMS and helping in pre-normative documentary/physical standards definition.