Yet Another Anycubic i3 Mega Extruder For Flex (YAAiMEFF)

thingiverse

Anycubic i3 Mega extruder modification to handle flexible filaments. It uses an almost full bowden passthrough approach and adds variable tension adjustment. It's easy to print and to install. Material requirements: 4mm-2mm teflon bowden tube and M10 bowden fittings (the inlet one is optional) like this one: https://www.aliexpress.com/item/3D-printer-accessories-V6-fast-connector-M10-pneumatic-quick-joint-bowden-tube/32880549566.html U604ZZ U-groove bearing: https://www.aliexpress.com/item/10Pcs-lot-3dPrinters-Extruder-Parts-U-groove-idler-pulley-belt-pulley-bearing-U604ZZ-u-ditch-604U/32818240686.html M3 screw and nut for the tension controller. UPDATE: I've been using it since a bit before I uploaded it here (ABS) and I have to say it is working flawlessly. I only have to adjust the tension for each filament type (80-90% tension for flexible and 15-25% for rigid filaments). One really big improvement from the stock one is how easy it is to change the filament now, because the extruder wheel takes it and routes it perfectly. Furthermore, if a inner PTFE tube is added it is possible to attach there the stock filament detector without the magnetic support. I have added a knob grip to allow the adjustment of the tension by hand, without having to use a wrench.