A CAD/CAM system for vector-based layered manufacturing systems

We have developed a framework for process planning for vector-based layered manufacturing (LM) technologies. The framework proposes the use of computational geometry and optimization tools at two levels to reduce process time and material wastage. The proposed architecture is tested by an implementation for laminated object manufacturing (LOM) systems. Geometric techniques are used for planning at the 3D part level. A genetic algorithm (GA) based path optimization technique is used for path planning optimization at the layer level. The use of a direct slice format is shown to reduce the system time as well as storage requirements. Results of the implementation of the open-architecture LOM planner are presented.