Direct slicing from PowerSHAPE models for rapid prototyping

Rapid prototyping processes produce parts layer by layer directly from CAD models. An efficient method is required to slice the geometric model of a p art into layers. Several slicing methods are introduced in this paper: slic ing from STL files; tolerate-errors slicing; adaptive slicing; direct slici ng; adaptive and direct slicing. PowerSHAPE is a powerful package for build ing models, and it provided macro language and picture files for its second ary development work. To meet rapid prototyping slicing demands, the author proposes a direct slicing approach based on PowerSHAPE models. In this met hod, lines, arcs and Bezier curves are used to describe the section contour s. This approach can be used in stereolithography, selective laser sinterin g, fused deposition modelling, and other rapid prototyping processes, e.g. laminated object manufacturing. It may be the future solution to existing s licing problems.