X belt align ptfe filament guide runout sensor for direct drive

thingiverse

This is a remix of the fantastic X belt align mod combined with the PTFE guide and filament run-out sensor. I took the existing design from https://www.thingiverse.com/thing:3668847 and reverse engineered it into Fusion360 to modify and add the functionality of Bondtech DDS, including a PTFE guide for the Ender 3 and Ender3 Pro. While working on this project, I decided to add a simple filament guide using a 625 bearing to prevent filament strain and friction. Note that the micro switch in the design is not the same size as the ones I own, resulting in a mismatch between the model and the actual part. Assembly instructions are straightforward, following the original parts and additional steps are easy to follow, so I won't describe them here. This mod is designed for experienced DIY enthusiasts. My main goal was to avoid pulling the filament from the roll directly when the printer head moves on the X axis. Please don't mind the messy cables in the photos; I'm currently designing and building my own enclosure. This project has been a valuable learning experience, and I appreciate any feedback you can provide so I can improve the design further.