Motorized Filament Feeder
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Sometimes it drives you nuts to push push poush push filament until it's end to the extruder. Why not push via machine?
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Depending on what configuration you have, e.g. MMU or other multimaterial device you may need to feed five tubes inch by inch until filament arrives at extruder.
Just for my fun and pleasure I designed this (unneccessary) filament feeder.
It is battery driven (3xAAA), a gearmotor 6V with 200 RPM (3AAA underperform, but they work!). Filament is clamped between the idler wheel and powered rubber O-ring wheel.
I had a lot of fun designing it. I did this with TinkerCad! Printed parts (PLA) on my MK4. Wheels in PETG. A list of materials (BOM) is attached in the files area. With some skill from your side you should be able to understand all components and steps.
For power conduction I wound some Ø0.6mm (+/- AWG 23, single wire) around the thread, a large washer connected to the battery minus (spring) conducts power to the limit switch, which is configured as “NO” (normally open).
While clamping the filament, the motor should start running without further buttons, and stop as soon as you release the handle.
Explore my other Printables: https://www.printables.com/de/@Tritschi