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Zigzag marble runs
A zigzag run (or drop wall) sends the marble along a ramp, drops it onto the next ramp going the other way, and repeats all the way down. It’s flat, easy to print and loud in the best way.
Start from a preset
Each preset opens in the generator, ready to tweak, test and download.
Popular zigzag marble runs from the gallery
ZigzagHow it works
- Ramps alternate direction down a central wall, with an end plate at each side.
- At the end of each ramp the marble drops onto the next one. Optional drop guards stop it bouncing off.
- Each ramp’s underside stays within the overhang limit, so the wall prints without supports.
Settings you can change
| Wall length | 60–400 mm. Longer walls give longer ramps and a longer run. |
|---|---|
| Extra drop height | Bigger drops make louder clacks. |
| Wall and end plate thickness | Thicker walls make a sturdier toy. |
| Drop guards | Keep the marble on track at each switchback. |
| Marble | Heavier ½″ (12.7 mm) steel balls give the best sound. |
Every style also lets you pick your printer, marble size (6 mm BBs to 25 mm shooters), groove shape, slope, wall height, base plate, label and colours.
Printing tips
Zigzag walls print quickly because they are thin. Use a slightly steeper slope for light balls, and print the test piece to check the drop. Slice with supports off, 0.2 mm layers and 3–4 walls. The full print guide covers slicer settings and troubleshooting.
Other styles
- Spiral marble run towers: A spiral tower winds a track down around a central core.
- Freeform marble runs: A freeform run wanders across the printer bed in loops and bends, held up by fins with pointed arches (like a Roman aqueduct) or by thin pillars (like a roller coaster).