Extruder filament guide with roller - Ender 3

thingiverse

An extruder filament guide with a roller for effortless and silky-smooth filament feeding is designed specifically for the Ender 3, easily attaching to the extruder holder plate. This innovative design prevents the filament from grinding into the extruder plastic, ensures a smooth feed, and provides essential clearance from the Z lead screw. Printed in just three parts, this guide is extremely easy to assemble. Two variants are available: one with an arm that keeps the filament securely in place, and another without the arm, allowing for manual plugging and unplugging of the filament with moderate force. The roller's slight protrusions where it meets the sides ensure a small clearance, guaranteeing smooth rolling; lightly sanding the roller edges is still beneficial, but not necessary. To get the best results, avoid pushing the axis in too tightly, as this can cause friction between the roller and its mounting point. Instead, allow the roller to rotate freely without any restriction, giving it just enough room to wobble for optimal performance. For optimal results, consider pairing this guide with the "Ender 3 Extruder Upgrade" available on Thingiverse at https://www.thingiverse.com/thing:3095575.