WeaveSlicer: Expanding the Range of Printable Geometries in Clay

Document Title

WeaveSlicer: Expanding the Range of Printable Geometries in Clay

Document Information

• Subject Area: Integration of 3D printing technology and ceramic art
• Keywords: Clay 3D Printing, Digital Fabrication, Slicing Software, Toolpath Generation, Ceramics, Artist Residency

Research Background and Issues

• Identified Problems or Challenges:
  Traditional 3D printing slicing software (e.g., Cura and Simplify3D) is optimized for thermoplastic printing toolpaths and cannot accommodate the specific characteristics of ceramic printing, such as continuous extrusion, low hardening speed, and significant shrinkage. Ceramic printing often faces issues like inconsistent wall thickness, difficulties with support structures, and print failures.
• Significance of the Research:
  Ceramic printing technology is increasingly applied in art and design, but the limitations of existing slicing software prevent the successful printing of many complex geometries. Addressing these issues can significantly expand the possibilities of ceramic 3D printing, providing new tools and techniques for artistic creation and research.
• Motivation and Related Work:
  Through experiences in artist residency programs, the authors discovered that traditional methods could not meet the demands of printing complex ceramic shapes. Similar research has attempted to extend printable geometries by generating support structures, but these methods are inefficient and struggle to handle fragile ceramic materials.

Solution

• Method or Solution:
  The authors propose a new slicing software tool, WeaveSlicer, specifically designed for the unique properties of ceramic materials, generating continuous toolpaths with consistent wall thickness. The solution is based on oscillating paths, where the amplitude of oscillation is determined by the overhang angle of the printed object's walls.
• Innovations:
  1. Continuous support-free toolpaths, avoiding the "travel path" issues of traditional software.
  2. Dynamic adjustment of oscillation amplitude through mathematical formulas to ensure consistent wall thickness.
  3. Generated print textures feature nested structures, potentially enhancing the mechanical strength of printed objects.
• Implementation Steps and Key Techniques:
  1. Import 3D models into the Rhino and Grasshopper environment.
  2. Users set printer parameters (e.g., extrusion speed, nozzle size) and WeaveSlicer-specific parameters (e.g., wall thickness, oscillation period).
  3. The software calculates the amplitude and frequency of oscillation for each layer's path.
  4. Output directly printable G-code files and perform printing using continuous toolpaths.

Research Outcomes

• Specific Results:
  • Successfully printed complex geometries that traditional slicing tools could not achieve, including ceramic objects with significant overhang angles.
  • WeaveSlicer-generated oscillating toolpaths addressed issues such as thin walls, print failures, and subsequent cracking problems caused by traditional methods.
• Advantages Compared to Existing Solutions:
  • No need for support structures, significantly reducing material waste and post-processing work.
  • Expanded the possibilities of ceramic material printing, including more complex and large-scale geometries.
  • Provided a new aesthetic texture effect (similar to weaving).
• Experimental or Evaluation Results:
  • Comparative experiments with traditional toolpaths showed a significant improvement in print success rates using WeaveSlicer. The same objects collapsed or deformed with traditional slicing methods, while WeaveSlicer successfully passed evaluations across different printer and material combinations.
  • Experiments also validated the stability of oscillating toolpaths in maintaining consistent wall thickness.
• Limitations and Future Directions:
  • Currently supports only single-contour models. Further development is needed for slicing functionality in objects with multiple contours or holes.
  • Printing extreme overhang angles (e.g., 15°) remains challenging and could be optimized through adjustments to layer height or non-planar base printing methods.
  • Plans to integrate the WeaveSlicer concept into other customized slicing software to support a broader range of geometries.

Discussion and Implications

• Impact on Artistic Practice:
  The authors' creative experiences during artist residency programs demonstrated WeaveSlicer's practicality in printing complex geometries, reducing post-processing difficulties, and enabling larger and more intricate ceramic artworks.
• Integration with HCI Research:
  Collaboration between artists and researchers has driven innovation in technology and art. Residency programs played a crucial role in helping the research team understand material characteristics and advance slicing tool development.
• Generality of the Method:
  WeaveSlicer is simple and scalable in design, making it widely applicable to various ceramic 3D printers, programming environments, and material types.

The above summarizes the main content and contributions of the document, presenting a new tool to expand the forms of ceramic 3D printing while showcasing a research model that blends art and technology.