JAFO ROLLER filament dry box and feed system for Prusa i3 MK3

thingiverse

9/24/2018 edited a top-end Bowden connector with six M6 threaded holes for Bowden connectors, carefully spacing them to avoid the Z-axis carriage part on your printer at maximum Z height. After spending countless hours searching for what I needed, I decided to create several components from scratch and edit some excellent work from others. Some of these files are specifically designed for the i3 Mk3, particularly the cover, cover adapter, and reverse Bowden endcap. The remaining files can be used as a standalone dry box for any other 3D printer. This is a dry box system for using multiple filament types in preparation for the MK3 multi-material option I pre-ordered with my Prusa printer. Initially, it was intended to hold four filaments, but after becoming MMU2.0, I upgraded it to five. Since I haven't received my order yet, I've put off expanding my capacity. I appreciate the Bowden concept so much that I heavily incorporated it into my design. The PTFE tubing I purchased from Amazon came with both PC4-M10 and PC4-M6 connectors, which is why I used both in my design – simply because I wanted to utilize what I had on hand. I'd like to thank the individuals whose work allowed and inspired me to create this: https://www.thingiverse.com/thing:2825557: Prusa i3 Mk3 Z-Tops with Reverse Bowden Mount Option by ctilley79 https://www.thingiverse.com/thing:2929701: The Ultimate Spool Holder Dry Box by ritchrock Sterlite 20qt Gasket Box with Latches ($7.99): Target Item Number 002-02-0819 https://www.thingiverse.com/thing:2510947: Filament Dry Box Tube Feeder by rainreign1 https://www.thingiverse.com/thing:2878333: Prusa i3 MK3 Bowden tube adapter with spool holder and filament cleaner by 828586 I should also thank Fusion360 for offering their software for free to makers like me, which I used for all my solid editing and creating. Here's a short list of the required materials: Two 5/16 rods (I used aluminum I had on hand; steel or wood dowels would work) 608 bearings (four per spool) Desiccant M3 screws and nuts (two per connector on box, approximately 20mm long) Sterlite 20qt Gasket Box with Latches ($7.99): Target Item Number 002-02-0819 I got my box for under eight dollars, but at ten dollars it's still a steal since it indeed seems very air-tight. My system has been working flawlessly for about two or three months now. I used super glue to attach the rods into the rod holders for extra stability. I added length to the legs on the holders so I could just dump the desiccant into the bottom of the box below the rollers. I created simple spacers to keep the rollers from impinging on each other or the side of the box. Everything that has a Bowden thread adapter got the threads added to the model. No force screwing adapters in; they thread in nicely. I printed everything in PETG because it's mostly what I use, and I wouldn't foresee any problems using different filament types. I made the JAFO ROLLER tight, so I recommend printing only one at first to test fit with your bearing; you may need to scale up a hair for ease of bearing install. Enjoy! I added the cover and cover adapter as well as the back plate for the box connectors. The only editing I did to those files was orient them for better printing.