Always Right Arrow Fidget Spinner

thingiverse

If you're not spending 5 hours per week learning, you're being irresponsible. To that end, I decided to learn something new. In this case, I wanted to start understanding CAD (OpenSCAD) and had a need for it. I had seen one of the arrow illusions on Facebook and wanted one. Thingiverse was there to support me once again at https://www.thingiverse.com/search?q=arrow+illusion&dwh=635b840b078ed87. The issue was that after a few prints, I had created a really cool "Rock". I wanted to be able to share the wonders of this illusion with the world, so I needed a way to present it. Did you know that "Necessity is the mother of education"? Armed with a need and the tools to do something about my dilemma, I googled "hole in cube openscad" and landed on an example. I have always felt that "Software is software once you understand the syntax," and this was really an example of that. I was able to start understanding how to utilize basic shapes, variables, scripting, relational placement, and a bunch of other stuff. Since I kind of liked the outcome, I wanted to share it. The tolerances are tight to achieve the best performance. I let Molly and Buster toss one around for a while, and after washing off the dog spit, minus a few teeth marks, it was none the less for wear. Since layers, printers, etc., can make a difference, in addition to the STL of individual parts and one of the whole shebang, I have also uploaded all of the SCAD stuff I did to allow you to tweak if needed. You can change almost all dimensions of the Bars, Gears, and Spindles. The text is configurable as well if you want to play. Hint: If you decide to make one, the bottom bar makes a great tool for pressing the small gear onto the third hub of the "Long Spindle". It's tight on purpose as is the fit of the fifth hub into the arrow. For me, I used the following settings in Cura: .3mm First layer .2 mm layers Supports are needed for the arrow 60mm/s Z-step Retraction on (Over parts) Most of the other stuff was default ADDITIONAL PARTS: 8 ea. 4-40X1/4 screws that can be easily self-threaded into the spacers. Just feeling good about figuring some stuff out. Edit: The washers are meant to be a rudimentary bearing, and you will want to have one, maybe two placed on top of each gear between the gear and top bar. This is a bit of a bushing to provide vibration dampening, friction relief, etc. And I wanted to give credit for the gears that were remodeled from here https://www.thingiverse.com/thing:2830690. HAPPY SPINNING!