Product Features

1. Hand-Crank Mechanical Lift: Features a satisfying stepped lift mechanism that uses a rotary crank to drive linear lifting pistons.
2. Dynamic Splitter Track: Marbles automatically separate at the peak, running down alternating curved tracks to keep the visual flow dynamic and unpredictable.
3. 100% 3D Printable Assemblies: From the support structure down to the gears, the entire machine is built out of interlocking printable parts.
4. Optimized for Standard Marbles: Engineered with smooth track tolerances perfectly suited for standard $14\text{ mm}$ to $16\text{ mm}$ glass marbles, plastic beads, or steel ball bearings.
5. FDM-Friendly Print Layout: Designed to print clean without messy structural supports when oriented correctly on standard build plates ($200 \times 200\text{ mm}$ or larger).

Printing & Assembly Recommendations

1. Filament Choice:
2. Chassis, Tracks, & Moving Pistons: PLA+ or PETG. Using a smooth matte or silk finish in solid colors (like the mint green pictured) gives the model a clean, highly modern aesthetic.
3. Mechanical Pins & Axles: Tough PLA or PETG to prevent friction wear over time.
4. Print Settings: * Print tracks and lifters with 3 wall perimeters and 0.2mm layer height to ensure a perfectly smooth surface for maximum marble speed and zero stalling.
5. Post-Processing Pro-Tip: A tiny drop of silicone lubricant, dry PTFE spray, or standard petroleum jelly on the moving lifter slots will make the hand-crank turn with buttery-smooth ease.