Automatic Measurement of 3-Dimensional Coordinate Measuring Machine by Means of CAD and Image Data

Summary The study deals with the method of the automatic measurement of workpiece dimensions being arbitrarily set on the table of a 3D-CMM. The measuring path is in advance generated on the basis of a personal CAD/CAM system employing the solid modeling technique. To know the position and attitude of a workpiece, the image data taken by an ITV camera are compared with CAD data, Based on the information, the measuring path is altered, that makes it possible to actually measure the workpiece. The method is experimentally found to be valid.