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Technical Brief

Comparing Slicing Technologies for Digital Light Processing Printing

[+] Author and Article Information
Tsz-Ho Kwok

Department of Mechanical, Industrial and Aerospace Engineering,
Concordia University,
Montreal, QC H3G 1M8, Canada
e-mail: tszho.kwok@concordia.ca

Manuscript received November 1, 2018; final manuscript received April 25, 2019; published online June 13, 2019. Assoc. Editor: Yong Chen.

J. Comput. Inf. Sci. Eng 19(4), 044502 (Jun 13, 2019) (4 pages) Paper No: JCISE-18-1292; doi: 10.1115/1.4043672 History: Received November 01, 2018; Accepted April 27, 2019

In additive manufacturing (AM), slicing is a crucial step in process planning to convert a computer-aided design (CAD) model to a machine-specific format. Digital light processing (DLP) printing is an important AM process that has a good surface finish, high accuracy, and fabrication speed and is widely applied in many dental and engineering industries. However, as DLP uses images for fabrication different from other toolpath-based processes, its process planning is understudied. Therefore, the main goal of this paper is to study and compare the slicing technologies for DLP printing. Three slicing technologies are compared: contour, voxelization, and ray-tracing.

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References

Jin, Y., He, Y., and Du, J., 2017, “A Novel Path Planning Methodology for Extrusion-Based Additive Manufacturing of Thin-walled Parts,” Int. J. Comput. Integr. Manuf., 30(12), pp. 1301–1315. [CrossRef]
Ahsan, A., Xie, R., and Khoda, B., 2018, “Heterogeneous Topology Design and Voxel-Based Bio-Printing,” Rapid Prototyping J., 24(7), pp. 1142–1154. [CrossRef]
Keeter, M., 2016, Formlabs DLP Slicer. https://www.mattkeeter.com/projects/dlp. Accessed Nov. 1, 2018.
Wang, C. C. L., Leung, Y.-S., and Chen, Y., 2010, “Solid Modeling of Polyhedral Objects by Layered Depth-normal Images on the GPU,” Comput. Aided Des., 42(6), pp. 535–544. [CrossRef]
Huang, P., Wang, C. C. L., and Chen, Y., 2013, “Intersection-free and Topologically Faithful Slicing of Implicit Solid,” ASME. J. Comput. Inf. Sci. Eng., 13(2), p. 021009. [CrossRef]
Chen, Y., and Wang, C. C. L., 2013, “Regulating Complex Geometries Using Layered Depth Normal Images for Rapid Prototyping and Manufacturing,” Rapid Prototyping J., 19(4), pp. 253–268. [CrossRef]
Mao, H., Kwok, T.-H., Chen, Y., and Wang, C. C. L., 2019, “Adaptive Slicing Based on Efficient Profile Analysis,” Comput. Aided Des., 107(February), pp. 89–91. [CrossRef]
Leung, Y.-S., 2014, LDNI-Based Solid Modeling. http://ldnibasedsolidmodeling.sourceforge.net. Accessed Nov. 1, 2018.

Figures

Grahic Jump Location
Fig. 1

Left-to-right: box with an extra internal surface; two cones sharing a same vertex; three tori are put as an assembly. The slice images are taken at the layers of 800th/1600, 764th/1527, and 145th/290.

Grahic Jump Location
Fig. 2

Inside Out: all normal vectors are pointing inward. Incoherent Normal: the normal of the highlighted region is pointing oppositely from other regions. Bad Face: existing some zero/negative-area faces. The slice images are taken at the layers of 1465th/2559, 204th/1267, and 1156th/2972.

Grahic Jump Location
Fig. 3

Left-to-right: Nut with a vertical hole on the inner surface (along the print direction); Square-torus with a flat hole perpendicular to the print direction; Triple-torus with multiple small holes. The slice images are taken at the layers of 630th/1109, 59th/2007, and 60th/301, respectively.

Tables

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