As we were designing an enclosure for the Mini, it became clear that we’d have to rearrange the hinged arm for the filament spool. I never really liked this part of the printer anyways. It was alway flipping down and spilling the spool, anytime I moved the printer. And, it doesn’t really get it out of harms way for transport, as it is still sticking out from the frame, and swings around freely. Mostly I didn’t care for the way it impinged on the otherwise clean profile of opening on the right side of the machine.
So, on with the redesign. First we didn’t want to modify the frame of the machine. Second, we wanted a simple removable arm, for travel. Third it needed to be strong, secure, and not prone to shifting around.
Here is we we came up with:
First we modified the original arm by cutting off the hinged section at the bottom and tapering it smoothly. This was as simple as a quick trip to the band saw and a file. This saved the trouble of reprinting the spool arm, but we executed the same mod on the stl file for this part, using a short OpenSCAD program (attached).
Next we designed a simple U bracket to mount to the side of the machine using the existing mounting holes, and the original hinge plate (reversed). Only other thing required was four 25mm M3 machine screws to install on the frame.
Result is a simple, secure, spool arm, which is easy to install or remove, and which leaves the right side frame opening clear and unobstructed, so that we could add an Acrylic panel to enclose it.
TabSynth Design Works
ArmBracket.stl (740 KB)
RemoveableArm.stl (413 KB)