Marble Run of Infinity

🌀 Marble Run of Infinity

A compact kinetic marble run with an endless looping track that continuously converts gravity into motion.

This design comes in two sizes:

• Small (S): 68 × 70 × 17 mm

• Large (L): 133 × 135 × 33 mm

Marbles will keep circulating through the loop for a long time, gradually slowing depending on print quality, marble type, and friction — which makes each run slightly unique and interesting to watch.

A sample video is available below.

🧩 Features

• No supports required

• Beginner-friendly print

• Fast print time (2–3 hours depending on settings)

• Optimized for smooth marble flow (V2 improved)

• Available in 2 sizes

⚙ Print Settings

Layer Height: 0.2 mm (0.16 mm for detail)
Walls: 3
Top Layers: 5–6
Bottom Layers: 4–5
Infill: 15–20% (Grid or Gyroid)
Print Speed: ~50 mm/s
Supports: None (brim recommended)
Orientation: Bottom on build plate

Light sanding is recommended for best performance.

🔧  Quick troubleshooting

• Marble stuck → light sanding helps

• Doesn’t complete loop → check print quality and layer smoothness

• Too slow → use a standard 16mm steel marble

• Results vary → depends on printer and filament

🔄 Updates

• 5/30/2026 – Issue found: marble could not climb hill reliably

• 5/31/2026 – V2 released with smoother slopes and improved flow

• 6/21/2026 – V2 tested and confirmed working

🧠 Concept    

This model demonstrates energy transfer:

• Gravity converts height → speed

• Momentum carries marble through the loop

• Small losses from friction gradually reduce motion

Each print behaves slightly differently depending on surface finish and tolerances.

licence

This model is for personal, non-commercial use only. You may download, print, and customize it for yourself. Selling, redistributing, or using the model or prints commercially is not allowed without permission from the creator.

permission request