[
  {
    "path": "README.md",
    "content": "Vortex Parts\r\n============\r\n\r\nA step file containing the 3D printable parts for the Vortex swept volume\r\ndisplay. It's designed around some components I had to hand, and probably\r\nwouldn't be the optimal design if you're starting from scratch. I hope it's\r\nat least a useful reference.\r\n\r\n![](./VortexParts.png)\r\n\r\nAdditional Components\r\n---------------------\r\n* The frame holds two P1.875 128x64 LED panels. FrameA and FrameB replace the\r\nrubber mounts on the original panels\r\n* Two 6mm x 225mm carbon fibre rods hold the panels rigidly to the core\r\n* The core holds a Raspberry Pi 4, a Hub75 interface (similar to [this](https://github.com/hzeller/rpi-rgb-led-matrix/tree/master/adapter))\r\nand a photointerrupter for synchronisation\r\n* 6015 bearing at the top (large enough for a Pi to fit through)\r\n* 6804 bearing at the bottom\r\n* The slip ring is from a car alternator - parts ASL9013 and ABH6004S\r\n* Mean Well LRS-100-12 power supply\r\n* YM2776 motor\r\n* A bunch of M4 nuts and bolts\r\n\r\nThere are two options for the control dial. The fancy version uses a\r\nRaspberry Pi Pico W, an accelerometer, another photointerrupter, a rotary encoder\r\nand a Waveshare 1.28\" round touch screen. The accelerometer is to help \r\nwith dynamic balancing (if you build one of these you'll be spending a lot of\r\ntime balancing it). The alt version is just a motor speed controller and a knob.\r\n\r\nThe Core has two 6mm channels to anchor the carbon fibre rods that hold the panels.\r\nThese get narrower where they pass the toothed section for the drive belt. This is\r\npurely to improve the print quality on the teeth by keeping a thick wall all around\r\nthe circumference. You need to run a 6mm drill down the length of those channels\r\nbefore you can fit the rods in.\r\n\r\nThe counterweights are designed to hold 1/2 oz lead sinkers\r\n\r\nThe casing is designed to hold a truncated 300mm sphere. I used a post top lamp,\r\ncut to size. I've included the jig I used to hold a Dremel in the existing\r\nopening and make a neat cut.\r\n\r\nWhen you're peering into your rickety spinning contraption, make sure you're\r\nwearing eye protection.\r\n\r\n"
  }
]