feeder for "Ultimaker 2 Rail System"

youmagine

After hundreds of printing hours on my feeder, the hook got loose, so I decided not just to replace it but also to fortify it a bit. Since using the U2RS means you don't have size restrictions at the backplate like you would with other designs, I added a few millimeters here and there, merging the body with a mounting plate. I also modified the hook shape slightly to increase surface area in contact with the main arm. My recommendation is to use any material you prefer for the body (PLA, XT, ABS), but stick with PLA for the best results. If your feeder has wear on it, you might get particles in your bowden/heater, and you definitely don't want ABS/XT there when printing at lower temperatures. To find other parts of the rail system, search for "U2RS" online. The settings I used were: printed - layer 0.1 - Fill 100% - speed 35mm/s. Make sure to move the knurled wheel just so much that the filament will be nice and centered in it. The Ultimaker2 rail system is available at youmagine.com; https://www.youmagine.com/designs/ultimaker2-rail-system-u2rs. My original feeder design can also be found there: https://www.youmagine.com/designs/and-another-um2-feeder-design. This feeder was largely based on the "mother of all UM2 feeders" at youmagine; https://www.youmagine.com/designs/alternative-um2-feeder-version-twoedit 1/2015. I recently updated it with a bit more mass around the bearing wheel to guide flexible filament better. I successfully ran an UM extrusion test at 230 celsius to 8.5 mm3/s using Makerpoint MP flex 45 semi-flexible filament. If you're looking for a feeder upgrade, this one might be sufficient for most users of the V1 design.