<p>I got an openbeam set on clearance from Makershed, took one look at all the M3 bits, and thought "Sure, I can build something with this once I've figured out exactly how I want to arrange and connect the pieces, but how do I prototype things?</p><p>So I made a module that implements a flat plate with a protrusion that locks into an openbeam slot (thank you so much, openbeam folks, for putting a dimensioned drawing online so I could copy the numbers into openscad and tweak them). The file uses that module to make a triangular corner clip and a crossclip (for joining beams not at an end). You could also make angled connections and lots of other stuff, but I haven't gotten to that point yet.</p><p>The clips fit quit tightly, at least the first few times you use them. You have have to change the clearances for your printer. And the crossclips need a brim to print, at least on my machine (and you have to trim off the support piece carefully). I doubt that they would work for a permanent installation, but it wouldn't be that hard to add holes for a bolt and a captive nut.</p>
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