First 3D printer build, hoping to use my stash of OpenBeam
February 05, 2023 06:47PM
After a long hiatus, it’s time to get my feet wet with a 3D printer. I bought more than enough openbeam to build one back when openbeam was new, but it never quite came together.

I really like the looks of both corexy and h-bot, but it seems like there’s a lot to consider when it comes to the kinematics and construction. I think I’d prefer the corexy.

My printer will live in my garage, which is unheated, basically uninsulated, dusty, and can get pretty humid. I think this means it should have an enclosure. I want to print PC-CF, so I’ll need a 300C hotend.

Overall, what I want is:
  • As much as possible, use parts I already have
  • Print engineering plastics
  • Minimum 200x200 print size
  • Enclosure compatible
  • Reduce cost where sensible
  • Klipper

What I already have is:
  • A 1200W 12V psu
  • 5x NEMA17 motors
  • 2x NEMA34 motors
  • 6x 500mm lengths of openbeam
  • 5x 1000mm lengths of openbeam
  • 6x NEMA17 motor brackets for openbeam
  • 4x DRV8825 stepstick drivers (maybe a 5th somewhere)
  • raspberry pi 4B
  • Tons of dev boards (Pi pico, black pill, blue pill, stm32F4 discovery, etc)
  • Tons of plywood, MDF, etc
  • A couple of friends with 3D printers who will probably help

I expect I’ll need to buy belts, pulleys, bearings, linear slides, a hot bed, enclosure panels.

What’s the best way to use this to make an excellent corexy printer? I’ve been thinking of using the Rosalind design as a starting point. I like the idea of keeping the motors out of the heated area. I also like the idea of keeping the filament in an enclosure due to the humidity.
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