Mark from GoMeasure3D shows the process of taking a CAD model and comparing it to scan data. In an ideal world every manufactured part would be an identical replica of the CAD model. In reality, every physical part that is manufactured has slight variations. Tolerances are acceptable deviations from the CAD model. By 3D scanning manufactured parts and comparing the measurements with the CAD model, we can determine whether the part meets acceptable tolerances.

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