I'm going to make this page a catch-all for various brackets, mounts, connectors, etc. related to assembling frames/"rigid" structures.
90 Degree Corners
1.25" SQ Wood Frame
Designed to fasten 1.25" SQ wooden posts to make cubes with flush edges. Not intended to be particularly high load capacity, but I've now built quite a few little (500mm on a side) cubes with them and they are working just fine for my needs! Holes are designed for No. 8, flanged head wood screws.
Shouldn't require any supports, brims, etc. I printed the ones in the pictures from this Polymaker ASA in Army Green. But I have also printed them in PETG and they have worked out just fine.
I initially designed these for making these (500mm)3 cube frames for some plant growing experiments, like the little romaine cell shown in the picture below.
Curious about those funky looking red and black printed gizmos with the servos? Those are my "DrumCam Valves". Not gonna lie, I was pretty pleased with myself when this one worked out as well as it did :) Certainly not without its faults, but for a first generation design, I think it's definitely a pretty good alternative to the $100+ store-bought alternative!
2020 Aluminum Extrusion
I recently had a project that resulted in a small pile of different 2020 part designs, so I started a separate page dedicated to them here: 2020 Aluminum Extrusion stuff
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Designed to fasten 2020 Aluminum Extrusions to make cubes with flush edges. Not intended to be particularly high load capacity, but I've built quite a few frames from this general design, and they are working just fine for my needs! Holes are designed for M5x16 BHCS fasteners, but slightly shorter (maybe down to 12mm...maybe...?) should work.
Mine have printed fine without supports, brims, etc.
I printed these in Orange Overture PETG with 0.48 layers on a 0.6mm Revo nozzle.