A multi-DOF rotary 3D printer: machine design, performance analysis and process planning of curved layer fused deposition modeling (CLFDM)

Zhao, Donghua; Li, Tianqi; Shen, Beijun; Jiang, Yicheng; Guo, Weizhong; Gao, Feng

doi:10.1108/rpj-06-2019-0160

Cited by 20 publications

(31 citation statements)

References 36 publications

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“…In this way, the error resulting from resetting the support manufactured with a different 3D printer on the build platform is avoidable. 14 Hence, collaboration among multiple print heads is considered.…”

Section: Challenges Of 3d Printers' Structure and Process Planning Of...mentioning

confidence: 99%

General Function sets theory-based type synthesis of the collaborative 3D printer for planar and non-planar printing

Zhao

Guo

Han

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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3-dimension printing (3DP) or Additive Manufacturing promises rapid prototyping with 3D printers, the precondition for manufacturing complex components and surfaces. Usually, three-axis 3D printers are widely applied with planar slicing, limiting solid freeform fabrication with finite printing direction. Non-planar slicing (or curved layer slicing) has been put forward to break through the layerwise framework with infinite directions, requiring multi-axis 3D printers with more than four DOFs. However, as far as the authors know, the specific design method of 3D printers’ structure has seldom been studied for non-planar printing. Furthermore, there is no specified systematical research on the type synthesis of the 3D printer, which has two collaborative modules functioning together. One module serves as the build platform and the other as the print head attached moving platform. Hence, to obtain topological structures of the collaborative 3D printer for planar and non-planar printing, this paper investigates the type synthesis by introducing a research background at first. Then, the motion characteristics of the collaborative 3D printer are determined based on the planned paths’ geometric characteristics and motion requirements of the 3D printer. After that, General Function sets theory and the distribution principles are introduced, and the case study of 3D printers with 3T, 3T1R, and 3T2R is given. Finally, this research paper proposes a class of rotary 3D printers having 2T1R, 2T2R, and 2T3R innovatively. Furthermore, one prototype of the above case study is designed, and a preliminary experiment for planar and non-planar printing is carried out to verify the feasibility of the type synthesis’s result. In general, aiming at planar and non-planar printing, this paper presents a theory for type synthesis of collaborative 3D printers to offer a much richer set of kinematic structures than the most commonly used three Degree of Freedom printers.

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Section: Challenges Of 3d Printers' Structure and Process Planning Of...mentioning

confidence: 99%

General Function sets theory-based type synthesis of the collaborative 3D printer for planar and non-planar printing

Zhao

Guo

Han

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

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“…It is expected that, with further design optimization, higher speeds could be achieved, for instance, by reducing the moving weight and increasing the motor sizes. The total cost of the materials is 1500 €: while more expensive than mass-produced printers for the consumer market, this cost is comparable with similar prototypes [16,25] and could easily be reduced through a manufacturingoriented redesign. bearings move with low friction.…”

Section: Coreh-bot: Our Prototypementioning

confidence: 99%

“…While SCARA printers can provide a larger workspace than Delta printers, they are less rigid (and thus less accurate) due to their serial architecture. (d) Polar printers rotate the platform around a fixed axis, while the nozzle usually has two translational DoFs, along the vertical and the radial directions [25]. This design is cost-effective and leads to smaller footprints; however, the 3D printed part moves as the platform rotates, inducing vibrations that reduce the print accuracy.…”

Section: Introduction 1architectures For 3d Printingmentioning

confidence: 99%

An Alternative Parallel Mechanism for Horizontal Positioning of a Nozzle in an FDM 3D Printer

2022

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In 3D printer design, special care must be taken when choosing the print head positioning mechanism. Indeed, this choice has a significant influence on the manufacturing accuracy, printing speed, workspace characteristics, and total cost of the printer. Considering 3D printers with layer-based processes, many designs include two stages: a planar mechanism for positioning the nozzle on a horizontal plane and a linear mechanism for the vertical build–plate motion. From the literature, two designs are usually applied for horizontal motion, commercially known as “CoreXY” and “H-bot”. Their load distribution characteristics are compared here: it is found that both have significant drawbacks. Therefore, an alternative architecture, called “CoreH-bot,” is introduced to overcome such limitations; this mechanism is both fully planar, which greatly simplifies its design and assembly phases while increasing part life, and has low unbalanced torques during motion, which increases the maximum speed for the given accuracy. The CoreH-bot kinematic equations are analyzed to define the Jacobian matrix and the corresponding workspace. The static and dynamic analyses are also performed. A prototype with this architecture has been designed that shows interesting capabilities in terms of print speed, while being both simple and cost-effective to assemble.

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“…For instance, Isa et at. [14] and Zhao et al [26] designed and constructed a new custom 3D printer that is dedicated to conformal 3D printing. In a different approach, Teibrich et al [22] developed a hardware setup that is integrated into an existing desktop 3D printer to combine subtractive and additive manufacturing on a rotary platform.…”

Section: Related Work 21 Conformal 3d Printermentioning

confidence: 99%

Open5x: Accessible 5-axis 3D printing and conformal slicing

Hong,

Hodges,

Myant

et al. 2022

Preprint

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The common layer-by-layer deposition of regular, 3-axis 3D printing simplifies both the fabrication process and the 3D printer's mechanical design. However, the resulting 3D printed objects have some unfavourable characteristics including visible layers, uneven structural strength and support material. To overcome these, researchers have employed robotic arms and multi-axis CNCs to deposit materials in conformal layers. Conformal deposition improves the quality of the 3D printed parts through support-less printing and curved layer deposition. However, such multi-axis 3D printing is inaccessible to many individuals due to high costs and technical complexities. Furthermore, the limited GUI support for conformal slicers creates an additional barrier for users. To open multi-axis 3D printing up to more makers and researchers, we present a cheap and accessible way to upgrade a regular 3D printer to 5 axes. We have also developed a GUI-based conformal slicer, integrated within a popular CAD package. Together, these deliver an accessible workflow for designing, simulating and creating conformally-printed 3D models. CCS CONCEPTS• Hardware → Emerging technologies.

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A multi-DOF rotary 3D printer: machine design, performance analysis and process planning of curved layer fused deposition modeling (CLFDM)

Cited by 20 publications

References 36 publications

General Function sets theory-based type synthesis of the collaborative 3D printer for planar and non-planar printing

General Function sets theory-based type synthesis of the collaborative 3D printer for planar and non-planar printing

An Alternative Parallel Mechanism for Horizontal Positioning of a Nozzle in an FDM 3D Printer

Open5x: Accessible 5-axis 3D printing and conformal slicing

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