Increased accuracy by using dynamic finite element method in the constrain-surface stereolithography system

The E-DARTS apparatus is a commercial rapid prototyping (RP) system that uses the constrain-surface stereolithography (SL) technology. The advantages of the type SL system are saving resin and apparatus fees, although its accuracy needs to be increased. To find the best scanning path planning is one solution to improve the accuracy of the built part. In this paper, the diagnostic H-4 parts have been fabricated and simulated according to different path plans. The critical dimensions of the built H-4 diagnostic parts are also measured and compared with the analytical results, showing that the best path plan for building the H-4 diagnostic part is the contour-out path. In addition, it has been shown that using the skip skill in raster fill is also effective for improving the full filling of the big or long area.