mm3SpoolHolder

thingiverse

I want to have my spools held firmly in place by bearings, but also like the MM3's original spool holder. This is a very rough attempt at a spool holder that works just like a tire balancer. Two cones hold the spool, allowing for a slight variance in its ID and width. I measured different spools on hand to get the parameters, can't remember what they were now. Filaments.ca and MTW spools fit perfectly with no issues. One could easily modify the cone shape to tailor it to their specific spools. One cone is attached to a threaded shank, while the other is held by a matched threaded nut. Two 608 bearings keep the shank aligned to the M8 bolt that comes with the MM3. It's currently designed to work with the two jam-nuts that come with the MM3 kit, but it could be cleaner with some small spacers that only contact the inside race of the bearings. The knob on the nut is quite large, but it feels great to turn and gives a nice bit of torque to mash the threads tight. It also makes loosening easy, too (and it looks really neat). I'm not a skilled modeler. The meshes are clean, but a bit rough for sure. Prints fine for me with S3D. Printer Settings Printer: MTW - mendelMax3 Rafts: No Supports: Yes Resolution: 0.2mm Infill: 15 - 35% fast hex Notes: - White filaments.ca PETG is used because it's the best at everything. - Four solid layers are printed on top and bottom. - One or two shells depending on your preference. - Supports are necessary for the well in the nut, but not for the shank. S3D supports are really great. - At 35% infill, they're much more heavy duty than needed. I'll probably remake these at 20%. Post-Printing Clean up IDs with a hobby knife and some beveling if necessary. I did a touch to seat the bearings easier, which will be designed in for V2. Same goes for thread interface. Snap those bearings in quickly. I bought 100x 608 bearings off ebay.ca for like 28 bucks CDN. These bearings are super common, cheap, and handy - get some! How I Designed This Tire / Prop balancer: The same basic principle as a tire balancer or prop balancer works really well in PETG, haven't tried it in anything else. Primary reason for making this was to keep the ridged spools from hitting the M5's that mount the spool holder plate to the 2020 extrusion at the back. I also wanted constant tension on the filament with the bearings. Cinema 4D is definitely better than your other favorite modeling suite.