edwardagon, a polyhedron

thingiverse

Presented here are two versions of a polyhedron. This structure was made using trigonometry to find the elevation of a vertex at the center of the faces of a dodecahedron that would support flat diamond shaped faces between adjacent pentagons. And so, for fun, rather than look it up on the internet (where it has no doubt been discovered numb-ingly-erious times), I just named it an edwardagon. The smaller version is easily damaged so I increased the support diameters to give a larger, more sturdy, version. Also provided are removable panels that can be embellished, colored, and embossed to provide variety and then popped into the frame. Most structures were created piecemeal in Openscad (wimpy computer), combined in Meshmixer, then scaled, sliced, error corrected, adjusted for fit, and exported as STL files for this article using Voxelmaker, which came with my trusty Voxelab Aquila 3D printer. Total here should turn out at about 12-15 files. I'll count em later. This stuff is way time consuming and I'm 76 years old, hence the shortcuts. No 3D supports are needed for the panels, just for the structural stuff. :) Three main STL files are provided for each object. One is the frame, a lattice, the actual polyhedron that the diamonds can be mounted on. The second is a hollow solid, the consolidated diamonds and polyhedron. The third is a group of ten, or so, snap-in diamonds (it takes 30 to cover the polyhedron). Two programs are provided. One for the polyhedron and diamonds. Various features can be turned on or off using remark statements The program default mode is a difference function that subtracts the frame (see module cloak) from a flap or diamond (see module bbb). this provides a single isolated diamond The second program is a trimming program that removes the bottom edge of the diamond and then applies a tab or detent to hold the diamond in place in the frame. Originally, all the dimensions were derived from a dodecahedron assuming the radius of each pentagon face was one unit or millimeter. The default scale factor in the slicer was 3000%. Once a diamond was created by subtracting the entire frame from just one panel, that diamond had a cup shaped edge as shown in the picture. The trim program removes the bottom edge, and adds the tab or ball detent for holding the diamond in place on the frame. Scale factor for the diamonds is slightly smaller for clearance reasons, 2950% on the x and y axis, but still 3000% on the z. Too complicated, right? Hence the provided files are already scaled up, ready to make. No data or certainty is provided for the smaller support frame ball. Sorry I haven't remade it yet, lost the original stl files that were originally made only as temporarily by the slicer. I originally zoomed thru to the perquisite cnc file and threw the original data away (oops)!! But the same programs (with a change in variables) were used to create both. Thanks, way too much work :) Will try to check the small ball data soon. Sorry about that....