Creality BLTouch auto bed leveling sensor can replace the manual bed leveling process. It is much accurate then Z-limit switch and it's reference point is the printing surface in several spots. BL-Touch is high precision intelligent sensor with standard deviation of 0.005 mm. This very light sensor can be mounted next to the moving X-axis. The installing is easy, because it can be directly inserted into dedicated slot on the mother board. It requires firmware update, but this update is available on Creality website.
Since I use edited Marlin firmware (since I need allowed temperatures above 260°C for MicroSwiss all metal hotend), I needed to add BLTouch to that firmware. Teaching Tech instructions are for version where two wires use Z-limit pins on MotherBoard.

Updating the Firmware to allow temperatures above 260°C (starts from 21st minute)
   • Ender3 V2 upgrade: All metal hotend b...  

Used in video: BLTouch auto leveling sensor kit on Banggood (affiliate):
https://www.banggood.com/Creality-3D-...

Springs and knobs used in video:
https://www.banggood.com/4Pcs-Upgrade...

Updated info on MyTechFun website:
https://www.mytechfun.com/video/88

Other Ender3 video upgrades:
https://www.mytechfun.com/videos/ende...

Microsoft Visual Studio Code
https://code.visualstudio.com/

Teaching Tech firmware tutorial (not 100% for this BLTouch):
   • Creality 32 bit V4 board guide - Ende...  

Marlin on Github:
https://github.com/MarlinFirmware/Marlin

Contents:
0:00 Introduction to BLTouch
0:55 Bed leveling theory
3:53 Unboxing
4:38 Assembling
5:47 Locking the knob position attempt
7:58 Firmware update (factory)
9:31 BLTouch mounting
11:19 Wiring
13:40 First test auto home
15:03 Z-offset setting
17:08 Prepare the slicer (Cura and Prusa)
17:49 3D printing leveling test object
20:02 First conclusions
21:27 Marlin firmware edit
23:44 Searching X, Y offset
24:36 Compiled firmware update
26:10 Z-offset with custom firmware
28:17 Final conclusions

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#bltouch #crealitybltouch #ender3v2