this post was submitted on 27 Mar 2026
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I've been given some linear rails, and the only thing I can think to do with them is build a large format 3d printer. I have two 750mm and two 670mm rails, two carriages each.

I know there are several open-source plans for printers, and I could use a cool project to work on. I already have a smaller printer to work with so I can already make a lot of the parts.

Has anyone done this before? What printer did you build, and do you have any recommendations and things to look out for?

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[–] neidu3@sh.itjust.works 2 points 1 month ago* (last edited 1 month ago)

I built a Prusa Mendel from scratch eons ago. With enough of effort, and a more modern nozzle and extruder, you should be good. You probably want to have some 3d printed parts as part of the assembly, so see if you can find someone nearby.