Yet another Original Prusa i3 MK2 Spool Holder

thingiverse

My take on a simple and quick spool holder for the MK2.\nFor an easy replacement of the stock parts, print the arms and one rod and you're all set. It's as straightforward as "put rod through spool", "drop rod into arms". Even when you have different spools from various brands that are different widths it's still just drop-in and print.\nFor more complex usage, as I've got installed on my MK2, print two sets of arms and one of each rod. If your spools are as narrow as the ones I use, you can fit up to three spools on the printer at once with that configuration, with two spools sharing the long rod and having an arm between them. Or more commonly, two spools on the printer with one on each rod, and easy swapping of whichever spool is not currently in use while the other one is printing.\nI've been using these for months now, and there doesn't seem to be any need to have things on the ends of the rod to keep them from sliding around. Printing them with thick layers results in matching grooves in both the rod and top of the arms and with the weight of a spool pressing down it all just stays put.\nPrint Settings\nPrinter: \n Prusa Original i3 MK2\n \n Rafts: \n No\n \n Supports: \n No\n \n Resolution: \n .2\n \n Infill: \n 20%\n \n Notes: \n I've done the arms at 0.2mm and the rods at 0.35mm. But really it's all just straight vertical printing, you can probably get away with the thickest layers your printer will do and get them done faster. I do like to do them with three perimeters for strength.\nFeel free to scale the rods in Z-height if different lengths would work better for the spools you have.\nHow I Designed This\nThe original spool holders from Prusa Research GitHub are built with OpenSCAD, with short 16mm-diameter cylinders extruded from the arms. All I did was change those into 16mm holes through the arms instead and cut the tops off to allow dropping them into place. Then just a couple of 16mm cylinders as rods and done.