This is a replica of a Milky Way's style Stargate and the SGC ramp. My goal was to design something that is both easy to print and easy to assemble. Some trade-offs had to be made, for example the symbols and textures are all simplified so they can print correctly on smaller printers. Initially I wanted to post this project on thingiverse, and I still might, but I have yet to write detailed assembly instructions and for the time being I still wanted to showcase this project. This post includes all the design files, the stl, the arduino code, a few photos, and some notes on assembly but it is by no means a step-by-step guide.
The 3D models have been designed in 123D Design which, in retrospect, was a poor choice for this project. It is extremely slow on complex sketches such as the symbols ring. On top of that it was recently discontinued! I am unaware of any method to export to Fusion 360 in a format that is editable but you can still download 123D for free if you wish to edit my designs.
Cura 2.5 was used to generate the GCode with the following settings:
The printer used was a Monoprice Select Mini and the material was Hatchbox grey PLA (white for the chevrons). I designed everything with a 120x120mm printer in mind and the STL will give you a 117mm(4.6") gate diameter. If you decide to resize it, special attention might be needed for the motor gear.
To assemble the project you will only need glue and I recommend Loctite 401 or low temperature hot glue. The starting friction of PLA on PLA is quite high and your stepper might have an issue starting. I suggest using a paper ring that sits between the symbols ring and the back rail so that it's not PLA against PLA. Grease or oil might also work.