Marble Maze

The model

Each tile measures 50 × 50 mm and is 11 mm high. The channel is 15.2 mm wide with a round bottom and 8 mm high walls, so the marble sits in the track beyond its center. Ramps lift the track by 14 mm; the bridge leads it over a second track that runs underneath through a tunnel. Ramps and bridge are 25 mm high.

Every edge has a dovetail peg and a pocket. The arrangement is rotationally symmetric, so every tile fits to every other in any rotation. Tiles are inserted from above: the peg is slotted, its two halves spring by 0.3 mm and latch with a lug into a groove of the pocket. This keeps the surface together when tilting and lifting, and with a little force it can be released upwards again.

The pictures show a layout of 9 tiles (start, 2 curves, 2 ramp curves, bridge, T piece, 2 dead ends) with a frame of 12 edge pieces: the marble runs from the funnel over the ramp onto the bridge, back down, through the tunnel under the bridge and into the goal; at the T piece a dead end branches off. You can print as many tiles as you like and extend the area in any direction. The fit test consists of two small blocks with a peg and a pocket.

View print notes (German)

Print notes included in German; part names are self-explanatory.