Electronic Bed Leveling Tool
This page supports the Electronic Bed Leveling Tool shown on YouTube. The Kit can be purchased from Howtronics.com.
The assembly instructions and how to use it are in the attached document below:
3D Print the red End Cap shown in the picture and make the Electronic Bed Level more stable and keep the battery holder off the bed.
Ender 3 - Bed Level Test Print
Ender 3 Max Size Test Print
Adjustment Helper Position GCode File
If you don't have Firmware that has the Z offset as I show in the video, here is a .gcode file you can run that will position the nozzle over each adjustment screw and automatically adjust to 5.8mm above the home position so you can dial in the bed. It relies on the M0 Marlin Pause command.
Ender 3 Size Bed
Note: Some Ender 3 don't recognize the M0 Pause command so this may not work for everyone.
Ender 3 Max Size Bed