Brachiograph - 3D printed parts for pen plotter

thingiverse

I created a Brachiograph:\r\n\r\n**https://www.brachiograph.art/**\r\n\r\nThe project is truly impressive and even with basic tools you can build a pen plotter in under an hour. Exceptional work.\r\n\r\nAs the owner of a 3D printer, I struggled to find suitable parts, so I designed these instead.\r\n\r\nI utilized a raspberry pi case as the base, while designing other components specifically to meet the needs of the brachiograph.\r\n\r\nThe arm length is precisely 80mm, following the manual's guidelines for construction.\r\n\r\nThe kit consists of:\r\n * **PiMountBase.stl**: The foundation for the raspberry pi and the shoulder servo\r\n * I added some spacers and a bit of space to accommodate a small perfboard pcb for a neat assembly. Additionally, I incorporated wireway (a more experimental feature) to achieve attractive wiring.\r\n * **ServoArmInner80.stl**: The inner servo arm with an 80mm distance between the center of the servos.\r\n * **ServoArmOuter.stl**: The outer servo arm; its positioning depends on where you attach the peg, but achieving an 80mm distance is not a problem. Servos can be secured with screws, or in my case, I used hot glue for convenience\r\n * **ServoLifterHornE0.stl**: The extended servo horn for lifting, featuring a 90-degree angle that enhances the pen's elevation, rather than pushing the arm aside.\r\n * **Standoff40mm**: This component provides additional stability to the inner arm but may reduce the drawing area; in my setup, 40mm was necessary. If you require a higher standoff, simply scale it in your slicer.\r\n\r\nTo assemble the kit, I applied glue to secure the servo horns and attached the peg with hotglue. The outer arm features marks at 80mm intervals, which should help position the pen's center 80mm away from the servo horn's center.\r\n\r\nVideo: https://www.youtube.com/watch?v=Cv_uGYh3t70