Hi All,

In this instructable, I will be talking about the auto bed leveling issues with Ender3 v3 SE and my attempt to fix it.

There are no tutorials online to help fix it.

Supplies

Step 1: Back Story

I bought an Ender 3 V3 SE, 2 months back, at first I found it an amazing 3D printer for beginners.

It started with an adhesion issue. I would typically clean the bed with alcohol, and adjust Z offset.

It worked, Then as part of troubleshooting. I adjusted the X-axis gantry and made sure everything was tight

But as I printed more, I noticed that the auto bed leveling was not working

Based on a series of experiments, I came to the following issues

The Printer does not consider leveling mesh data
Gcode pre-scripts also do not use mesh data
Adhesion to bed is not good
Firmware 1.06 promises to fix this. but I am unable to update the same (Many others have reported to Creality)

Conclusion: I must fix this myself

I got a tinted glass(4mm thick) cut from a local glass store (235x235 mm)
Yes, it works, you do not have to buy expensive branded glass beds
I removed the build plate and 2 screws as shown
I did not remove the magnetic bed, just placed the glass bed on it
Secure it with some paper tape
Clean with alcohol
Auto level and test print, If the first layer test fails like mine. go to the next step
As a reference, the first pic is data for the original bed and the last one is for the glass bed

I bought a manual bed leveling kit that was compatible with any Ender 3
We need to replace the existing screws and spacers with the longer m4 screws and springs
Spacers on the left side of the bed were smaller (2mm or so)
From the pic, you can see, that the bed level was bad, I thought I made a mistake
Initially, I used a spirit level, tighten the screws that were +ve and loosen where -ve
Post that I used the mesh data to adjust. and then running auto-leveling
With at least 6 iterations, I got it to a good number (variation 0.1 mm)