Filament Tipper (Makes Soft Tip to Filament to Prepare the Filament Tip for MMU2/MMU3)

Edit: 19-Aug: improved Version (V3): “squareNut”-Versions for “squareNuts”
                      “hexNut"-Versions for "hexNuts” -→ use 0.22mm for first layer. Indent for 9mm blade is only 0.2mm in V3!

Edit: 18-Aug: “squareNut”-Versions for “squareNuts”
                      “hexNut"-Versions for "hexNuts”

For introducing filament into buffer and MMU2/MMU3 you need to have a tip of filament that is not 45°cut nor 90° cut. The tip introduces the better the more the tip is softened, resp. 45 to 60° round tip.

My old design worked fine, but I saw some potentioal to simplify if and make more effective. Features:

One part will be printed twice. 4 Standard M3x10 screws and 5.5mm x 2mm high sqaure nuts are needed. Then from a 9mm cutter blade two break-offs (4.5mm) are needed. Finally two ø4x2mm neodyms and a bit glue.

The stl files have the half-piece of the tipper and a fake blade as well. When you print this with Multimaterial printer, use PLA for the two tippers and PETG for the fake blades. Thar provides you to get both parts simply apart from each other. See photographs.

Check the holes for the neodyms, maybe calibrate the drill hole. Set them with some glue flush to the 0.4mm incess, where the blade comes into. Let it cure securely. 

Put the square nuts into the four holes and check accessibiliy of the screws. Finally screw the two parts together and you should be good to go.

Note: the two blades of sitting unsymmetrically which means that turning the filament in one direction e.g. CCW is different from CW. If you find a prefernece for your operating and you feel fine, it is fine. Otherwards print the parts again, but arrange them mirrored on the build plate. That will make a significant difference.

Enjoy and happy printing.

Explore my other Printables: https://www.printables.com/de/@Tritschi