Design of a Computer-Aided Modeling System: A Case Study

Abstract

This paper describes a computer algorithm capable of seamlessly transforming a Cadkey part into tool paths that can produce a model using a Computer-Aided Modeling (CAM) machine. This was accomplished utilizing rules based on known machining practices developed in conjunction with Cadkey and Cutting Edge designers. The rules used for designing this software consist of fundamental principles of machining. In the conventional approach, these are the rules that are supplied by the designer and applied to the problem using a programs such as Cutting Edge. The basic set of rules and the original Computer-Aided Design (CAD) design were sufficient to create the needed tool paths with the user’s time and input replaced by a computer algorithm. A developed computer algorithm is much less flexible, but significantly quicker than a designer, so where applicable more robust rules which required greater time or iterations were chosen. The algorithm is general but can be applied to any CAD system. However, the specific design work was performed with Cadkey as the target low cost system and a Roland desk-top Computer-Aided Modeling Machine (CAMM-3) as the target cutting device. All assumptions made for this test case were based on the criteria of user’s convenience and economy. All the tests performed proved that the algorithm works and is capable of adding one more output device — a cutter as an output system.