Abstract
In most of the Rapid Prototyping systems, finite number of layers is stacked on each other to form a final object, which in turn incorporates, so called, horizontal and vertical stair-stepping effect. One evident cause of staircase effect is deviation between designed layers and built layers. In practice layers may be trapezoidal or rectangular, depending on the slope of the surface with the build direction, but RP process can create rectangular layers only because of recoating and scanning difficulties.Keeping this in view a new SL method, Slant Beam Rotation Scanning, has been studied, which could scan sloping surfaces without additional changes in recoating etc. Adding one rotational degree of freedom and using UV light a new scanning head has been designed to control the angle between light beam and normal to the layer surface. This way light can be inclined and rotated in 360 degrees at will. Using a new data format and multi-stage motion controllers the experimental system has been fabricated to rotate the beam at required build angles.This paper describes basics of new method and other theoretical aspects of the proposed process including new data format and tentative design of the system.
