Principles of traceability in coordinate metrology

A general procedure has been prepared and validated at INRIM for calibrating standards virtually of any geometries. It is based on extending the traceability of auxiliary calibrated standards of simple geometry to the required complex geometry by means of a CMM. It is the adaptation and extension of the well-known comparator principle to coordinate metrology. Relieved from the burden of traceability, the CMM flexibility is fully exploited to manage the geometries at hand