Schatz Linkage Bar, Evertible Cube

thingiverse

#### Schatz Linkage Bar ##### In this design, each pair can rotate between approx. -135 and +135 degrees, which is enough for the system to "evert" (invert) itself. I came up with this design while playing with Schatz’s Evertible (or invertible) Cube (https://www.thingiverse.com/thing:5089176), in search of a robust version for classroom use. A six-piece-ring behaves like a Schatz Evertible Cube. In essence, I have replaced the original tetrahedra with some square prisms, while retaining the critical orthogonal relationships of the Schatz Evertible Cube. It is easier to print and assemble, with more durability. It is fascinating to see the triangle everting itself along with the cube structure. Please pay attention to the A/B symbols I left there. For printing, please keep the bar(s) vertical to avoid using support. A raft is recommended for bed adhesion. The axis-to-axis distance is 80mm. The tight version is 0.2mm less than the regular loose version along the hole diameter. #### References 1. Schatz, Paul (2013). The study of rhythms and technology : the evertible cube: polysomatic form-finding (4th Ed., P. Carline, Trans.). Niggli Verlag. 2. https://www.thingiverse.com/thing:5089176 3. https://www.thingiverse.com/thing:5992342