SFB - Smart Filament Buffer

thingiverse

# Introduction This innovative supplement to the Smart Multi Filament Feeder project (SMuFF) can be used with other MMUs, in addition to enhancing the SMuFF. If you've watched my videos on the SMuFF, you might have noticed the "Filamess" issue that I'm trying to resolve. To address this problem, I came up with a filament buffer that not only provides an efficient solution but also boasts several impressive features: - compact design (327 x 210 x 55 mm) - various mounting options available - integrated unique filament run-out sensor for precise monitoring - easy loading and unloading process - up to 1000 mm buffering capacity per filament - choice between hinged or non-hinged designs Here are two brief videos showcasing the device: https://youtu.be/0ec92D4GgwU https://youtu.be/mqZ_M43gkhc # Options You can build this device with or without the filament run-out sensor. For the former, please use M05.stl and for the latter, use M05a.stl. My personal setup features a perpendicular wall/cupboard attachment using M02.stl/M03.stl. To mount it flat to the wall/cupboard, you'll need M02a.stl and M03a.stl instead. If you prefer not to attach it anywhere, use S01.stl (printed twice) and M02.stl printed twice for a stand version. As for the hinge, you can choose to assemble or skip it since the top lid is held in place by four strong Neodymium magnets. # BOM In addition to the printed parts listed above, you'll need: - 6 Acrylic plates, 4 mm thick (Plate.dxf) - 14 M4 x 50 mm screws - 16 M4 nuts - 14 M4 washers - 4 Brass inserts M3 x 6 mm (inlet & outlet) - 4 M3 x 12 mm screws (inlet & outlet) - 1 Threaded rod M4 x 125 mm (Hinge) - 2 Self-tapping screws 2.9 x 6.5 mm (Hinge) - 8 Self-tapping screws 2.9 x 9.5 mm (Hinge) - 7 Self-tapping screws 2.2 x 6.5 mm (OLED and Prototype board) - 2 Neodymium cylindrical magnets 10 x 10 mm - 2 Neodymium cylindrical magnets 10 x 1 mm - 5 Steel balls 8 mm - 1 Piece of ferromagnetic tape - 1 Prototype PCB 60 x 40 mm - 1 Arduino Nano V3 - 1 0.96" OLED (128x64 pixel, monochrome) - 5 Linear Hall-Sensors A1326 LUA-T or SS495A - 3 Microswitches 6 x 6 x 10 mm - 1 JST-XH male/female connector (3 or 5 pin - later for future enhancements) - and some wires and cables Well, that's it for now. # Update 1 I've uploaded the firmware code to my Github repository. If anyone is interested in creating a PCB for the electronics, please let me know. [1]: https://www.thingiverse.com/thing:3431438 "SMuFF project" [2]: https://github.com/technik-gegg/SFB "Github"