Traditionally, measurement system performance is characterized by the result of standardized testing. For example, gantry CMM + tactile probe systems are commonly qualified using ANSI B89, ISO 10360, or similar test procedures. Inherently, the aforementioned studies are not directly applicable for CT measurement systems due to non-uniform parameterization required to achieve an optimum result for scan specimen of varied shape, size, and material. For this reason, we have conceived a test to evaluate general machine performance by blending principles of B89 ball bar study and VDI/VDE 2630, an industry leading procedure designed to quantify uncertainty of Xray μCT measurements for industrial metrology applications.
Briefly, our study evaluates measurements of a calibrated scan artifact, repeated at intervals throughout the usable work volume of the machine. Optimized scan parameters are deployed at each machine condition to evaluate global system performance. Global results are also compared with results of local parameter sets to demonstrate the accuracy and precision achievable when best practices and application specific controls are administered.
See the White Paper at CyberOptics.com.