Modular Marble Run for Cooler Master Qube 540

If you like the project, a stand-alone version will be produced, with standardized plates, and many other course elements, including motorized elements! Let me know by commenting or rating this project!

Created for the Printables x Cooler Master contest, this project blends creativity, engineering, and maker spirit to turn a PC case into a mesmerizing mechanical playground.

🧩 Concept

This marble run includes over 20 interchangeable modules, all printable in 3D, allowing endless layout possibilities.
Each element can be combined, reversed, or reorganized to create your own custom marble track.

The system fits seamlessly inside the display area of the Qube 540.

✔ Fully Modular System

• More than 20 different pieces (and more come)

• Strong and easy-to-use snap-fit connectors

• Every module is compatible with one another

✔ Large Variety of Modules

• Straight and inclined rails

• Spirals, vertical drops,

• Connectors, junctions...

✔ Easy & Support-Free 3D Printing

• Majority parts designed to print without supports

• Pre-oriented STLs for fast and clean prints (soon)

• Compatible with PLA, PETG, ABS

🎯 Project Goals

• Deliver a fun, visual, and dynamic experience directly on a PC case.

• Showcase the creative potential of 3D printing applied to PC modding.

• Provide a fully modular system offering infinite build possibilities.

🧪 User Experience

Once assembled, the marble moves smoothly through the track, creating a relaxing and eye-catching motion.
Perfect to personalize your PC, spark curiosity, or simply enjoy a small moment of mechanical satisfaction.

🏆 Created for the Printables x Cooler Master Contest

This design was specifically created to highlight how 3D printing can expand PC customization, blending detail, creativity, and functionality into a single playful project. If the project proves popular, new modules will be added, such as ski lifts!

⚙ Some explanations

• There are several "Fix" and "Default Fix" models. The numbers at the end (0.10 / 0.15 / ...) indicate the tolerance. The lower the number, the less space there will be between the fix and the ball track components. Choose the appropriate tolerance based on your printer's precision.

• Most components are available in three different types: open, semi-closed, and closed.
  -Choose the "open" model to have only the bottom of the tube.
  -Choose "close" to have the tube completely enclosed; you won't see the ball pass through it.

  -Choose "semi-close" to have the sensitive areas completely enclosed.

  The choice between the open, closed, or semi-closed model depends on the ball's speed as it passes through the component, to prevent it from being ejected from the circuit.