minimalistic filament spool holder, fully printed, for Prusa Mini

prusaprinters

<p>I needed a second spool holder for my Prusa Mini. There are a couple of nice ones available, but I wanted to make my own version, for spools of variuos widths, and I wanted it to be minimalistic. I had also made <a href="https://www.printables.com/model/278236-filament-spool-holder-with-pencils-and-printed-bea">one with pens</a>, but I wanted one where I can just put the spool onto for convenience. So this is what I came up with.</p><p>It takes only 41 g of PLA, including printed bearings. The rollers are printed in vase mode, but they are quite rigid, and they come in 3 effective lengths (80mm, 100mm, 125mm for the 2kg Prusament spool). You can use 608 type 22mm ball bearings in them for smooth operation, or you can print some bearings. I included 2 variants. I suggest the roll bearings, they are easy to print, but try a single one first, as that depends on printer and filament. If you feel a bit more adventurous you can try the gear bearing; it requires a bit of work to break free and break in, but it's cooler of course :) Use random seam placement for both of them. Other printed 608 size bearings are available here on Printables, e.g. <a href="https://www.printables.com/social/340361-drjones/collections/271344">these</a>.</p><p>To expose the infill in the connector strips I placed a modifier block there (right click object, add modifier; see screenshot) with zero top &amp; bottom layers.</p><p>I also provide some 3mf files with all PrusaSlicer settings (those with “-prusa”), and some gcode files for the Mini.</p><p>Main Parts:</p><ul><li>Perimeters: 4</li><li>Infill: Honeycomb 15% or 20%</li><li>modifier on connector mid part: top &amp; bottom layers: 0</li></ul><p>Roller:</p><ul><li>spiral vase mode</li><li>bottom layers: 0</li><li>advanced → extrusion widths: 0.6mm</li><li>(skirt loops: 0)</li></ul><p>Bearings:</p><ul><li>layer height: 0.15mm</li><li>seam placement: random</li><li>output options → complete individual parts (if printing multiple in one go)</li></ul>