Ender 3 Z Axis Optical Endstop

Why I made this?

Because I has a Z-offset floating problem caused poorly made original mechanical endstop. At X and Y-axis this small imperfections on measurement are not crucial, but on Z-axis depends to first layer adhesion.

How I designed this?

I want to stay with tffmh's "z braces", which I had mounted on my printer. And this was good starting point to build bracket for optical endstop.

Base for mounting an "optical flag" is "stolen" straight from oldcyclist's project.

I need to cut X-Axis gantry cover for 3mm from bottom, to align original x-axis endstop in factory posiotion.

I designed new interrupt plate which fits on oldcyclist's base and my location of sensor. I make 5mm slot for additional z-offset regulation. It will be crucial in case of swapping different build plates.

What is needed to make this mod?

Parts:

Optical endstop - I think every cheap optical enstop for 3D printers are all the same
3 x M3 screw - If this isn't your first printer mo