What is the deal with the round feet?
One of the early design goals was to make the printer easy to move around. I made the feet rounded so they would self level on most surfaces. I made them out of HDPE so they would not scratch a wood table. I wanted the hole to act as a shock absorber. The feet turned out to be tougher than I first thought, so the shock absorber thing really did not pan out. Even though it adds more machining time, I kept the holes because I like the design aesthetic they bring.
Putting this design element on the feet and handle supports brings in a little ORD Bot DNA to the spool holder.
Did you design the corners
Misumi sells a similar bracket, but they are close to $6 each. That adds $48 to this project. The feet are built into the bottom brackets. That extra foot hole mounted to the extrusion adds a lot of stiffness too. I also added a little notch on three edges so the acrylic can project into the corners a little so there are no gaps. One of them presents an overhang in printing, but it is so small they they print perfectly without any strings.
Misumi also sell some rubber grommet like strips designed to mount acrylic in the slots. Using the corner wedges allowed me to build this entirely from scraps I had laying around the shop. The extrusion are part of my original laser design.
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