Dimensional accuracy improvement of fused filament fabrication holes utilizing modified interior

This paper proposes an alternative approach to improve the dimensional accuracy of the holes manufactured with Fused Filament Fabrication desktop 3D printers. As opposed to the state of the art techniques, where they scale the input geometric designs according to their predictive and statistical models, the proposed method modifies the interior of the artifacts with respect to the geometric properties of them to compensate for the shrinkages of the holes. That is, the shrinkage itself is utilized to eliminate the effects of shrinkage on the holes. This is accomplished by interior line segments which simply pull the perimeters of the holes outwards so that the dimensional accuracy of the holes will be preserved. According to the measurements performed on a Coordinate Measuring Machine, there is an about 80% decrease in the dimensional error with respect to the conventional 3D printing.