When selecting a coordinate measuring machine with a computed tomography sensor system, the resolution required for the measurement task must be considered.  The interplay of the detector, X-ray source, and location of the workpiece is critical.  If the machine components are properly matched, micro-features can be measured even within dense thick-walled workpieces.

In coordinate measuring machines with computed tomography (CT), the workpiece is positioned between the X-ray source and the detector.  Rotation of the workpiece allows 2D radiographic images to be recorded from various different directions.

The positional resolution also plays important role in dimensional measurements.  The positional resolution in coordinate measuring technology describes the smallest measureable displacement of a measurement point, and substantially influences the variation of the measurement results (repeatability) and thus the measurement uncertainty.

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