Möbius Cut Rings

A Möbius strip can be created by taking a strip of paper and giving one end a half-twist, then joining the ends to form a loop. One can use this object to cut a torus in two parts. Take two pieces of each part and you have our Möbius Cut Rings π puzzle. The goal is to make two linked rings.

Printing Instructions

Print two of each piece. Printing is a bit of a callenge with these pieces. I got the best results printing upright, just as the STL files are defined. Raise the pieses a bit above the print plate. Add support, add extra brim around the support to increase adhesion to the print plate. Also some people seemed to get good results with paint on support at the sides of the shapes. No support for the upper end of the arc is needed. It will usually not improve the print quality. Still due to the slender and high pieces and the overhang at the top, the pieces tend to move slightly when the print head is moving over them, resulting in a bad surface finish that needs some post processing to look reasonable.

Difficulty

3 out of 5

The Printable Puzzle Project

The Printable Puzzle Project aims to make available high-quality open-source models of many puzzle designs. All of our models are posted with the generous permission of their designers and are licensed for non-commercial use only. Anyone may print copies for their own personal use, but selling or otherwise monetizing them is not permitted, and puzzle designers retain all rights as copyright holders of their work.

Our puzzles are modeled using the open-source puzzlecad library. The .scad file is included with this model in case you want to modify any of its design parameters; more information on how to do this can be found in the PPP Puzzle Modeling tutorial.

The "No Problem Puzzle Collection" contains many puzzles with complicated boxes that would be too hard to model using open-scad. Additionally the original design files for the boxes have been lost due to a hd-fault. That is why these puzzles only contain scad-files for the pieces.

About The Designers

From November 2020 to April 2023 Theo Geerinck and Symen Hovinga collaborated under the trading name of "No Problem Puzzles" to design and produce their puzzles. Many of their unique packing puzzles introduce fascinating features such as moving or sliding doors and elements. These features and the way they behave always add a playful new dimension to the more familiar exercise of packing shapes. Those puzzles could once be purchased through an online printing service. Alternatively, for those who owned a 3D printer the files could be obtained from Symen.

However, after the tragic loss of Symen, purchases through the ‘No Problem Shop’ was no longer possible. Therefore, Theo decided to publish the designs so that everybody can create 3d-printed copies to be enjoyed for personal use.