Parametric geodesic star dome

This 3D model represents a geodesic star dome, which combines the structural efficiency of a geodesic dome with a unique star-shaped design. Based on the principles of geodesic geometry, renowned for its strength and stability, the model is optimized for 3D printing. It is printed in separate parts and assembled into a star-shaped structure, offering both an engaging design project and an educational tool.

Each bow has a length of just under 220mm in order to fit most printers without scaling, resulting on a 70mm height by 140mm diameter dome.

Disclaimer: Assembling the dome at the original scale can be a bit challenging! For an easier assembly process, it's recommended to print each bow group (found in the parts folder) in different colors. This will help differentiate the parts and simplify the build. Patience is key, take your time! :)

To assemble the dome, follow the diagram provided here: Star Dome Assembly Diagram.

Additionally, there are several instructional videos available on YouTube that offer step-by-step guidance and visual demonstrations to help with the assembly.

Assembling this model at such a small scale is more challenging than at full size, but it is definitely feasible. To help hold the structure together during assembly, you can cut small pieces of filament and flatten one of the ends with the help of a lighter to create makeshift nails. This will allow you to temporarily secure the parts in place. 

Once everything is aligned, use super glue to permanently bond the pieces together and trim the excess.

About the Model

Inspired by Buckminster Fuller’s geodesic dome design, this model adapts the concept into a star-shaped structure. All the bows in the model are of equal length, simplifying the assembly process and making it easier to build. The design combines the structural efficiency and geometric precision of the geodesic dome with the aesthetic appeal of a star, resulting in a visually striking and functional form. While the model is versatile, its full-scale version is suitable for domes only up to around 8 meters in diameter.

Similar dome structures have traditionally been constructed using bamboo, especially in Japan, where it has been utilized to create lightweight, geometric shelters. This 3D model merges these time-tested geometric principles with a celestial design, making it a perfect project for those interested in geometry, architecture, and 3D printing.

Parametric Design

This model is fully parametric and was created using OpenSCAD, allowing for easy customization. You can adjust the following parameters:

• Dome height
• Joint pocket size
• Bow width
• Bow thickness
• Print spacing (space between each bow)

File Structure:

The 3D model comes with two main file options for printing:

• star-dome.stl: This file contains all the bows needed to assemble one complete star dome.
• Parts folder: This folder contains individual files for each bow group, allowing you to print them separately in different colors.

Recommended print settings

• Material:
  • PLA - Layer height: 0.1 - 0.2
• Wall loops/perimeters: 3
• Infill: n/a
• Supports: none