Document Type


Date of Award


Degree Name

Master of Science in Mechanical Engineering - (M.S.)


Mechanical and Industrial Engineering

First Advisor

Rajesh N. Dave

Second Advisor

Nouri Levy

Third Advisor

Rong-Yaw Chen


Some of the drawbacks in inspecting a part using a Direct Computer Controlled Coordinate Measuring Machine are that a programmer has to generate a part program for the inspection process, and such programs have to be generated for each part to be inspected. These programs will be restricted to a kind of CMM, thus preventing the portability of the program t o other kinds of CMM.

If a part program can be generated off line after a part has been designed in a CAD system. an operator can inspect the part without any prior knowledge of the esoteric CMM programming language.

One of the drawbacks in developing a link from Computer Aided Design System to a Coordinate Measuring Machine involves extracting the feature and tolerance information from CAD Database, to be used by the CMM. The CAD Database has to be modified to contain the feature and tolerance information.

In the course of work directed towards this thesis a software package was developed for extracting the pertinent data from AutoCAD database to drive a Coordinate Measuring Machine. Information regarding features, tolerances and reference planes is generated. this is then converted to a Dimensional Measuring Interface Standard (DMIS) part program, a neutral format. which can be downloaded on to any CMM, where the CMM's preprocessor converts it to the machine specific program.



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