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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: A novel slicing strategy to print overhangs without support material
Authors: Wüthrich, Michael
Gubser, Maurus
Elspass, Wilfried Johannes
Jaeger, Christian
et. al: No
DOI: 10.3390/app11188760
Published in: Applied Sciences
Volume(Issue): 11
Issue: 18
Issue Date: 20-Sep-2021
Publisher / Ed. Institution: MDPI
ISSN: 2076-3417
Language: English
Subjects: FDM printing; 3D printing process; Overhang; Supportless printing
Subject (DDC): 670: Manufacturing
Abstract: Fused deposition modeling (FDM) 3D printers commonly need support material to print overhangs. A previously developed 4-axis printing process based on an orthogonal kinematic, an additional rotational axis around the z-axis and a 45° tilted nozzle can print overhangs up to 100° without support material. With this approach, the layers are in a conical shape and no longer parallel to the printing plane; therefore, a new slicer strategy is necessary to generate the paths. This paper describes a slicing algorithm compatible with this 4-axis printing kinematics. The presented slicing strategy is a combination of a geometrical transformation with a conventional slicing software and has three basic steps: Transformation of the geometry in the .STL file, path generation with a conventional slicer and back transformation of the G-code. A comparison of conventionally manufactured parts and parts produced with the new process shows the feasibility and initial results in terms of surface quality and dimensional accuracy.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: School of Engineering
Organisational Unit: Institute of Mechatronic Systems (IMS)
Appears in collections:Publikationen School of Engineering

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