3D Print - How to calibrate Z-offset with a BLTouch bed leveling probe sensor

I looked all over for the best resource to level my BL Touch probe. Finally, I found one on YouTube from 3DMN.

Follow these instructions to calibrate your 3D printers BLTouch bed leveling probe sensor.

What software do I need?

You can use any software that allows you to enter commands in your 3D Printer terminal/console including:

• Pronterface (https://www.pronterface.com/)
• Raspberry Pi 3 or 4 with OctoPrint / Octopi (https://octoprint.org/)

BL Touch Z-offset Leveling Instructions

Connect your computer to your 3D Printer using a USB cord and launch Pronterface.

1. Home your 3D printer
2. Reset Z0-Offset

   M851 Z0 

3. Store setting to EEPROM

   M500

4. Set active parameters

   M501

5. Display Active Parameters

   M503

6. Home your nozzle and show your Z-Axis

   G28

7. Move the nozzle to true 0 offset

   G1 F60 Z0 

8. Switch off soft end stops

   M211 S0

9. Get a piece of letter/A4 paper and place it under your nozzle
   Lower your nozzle towards bed slowly until the paper can barely move
10. Take note of the Z on the printer display (take that number and add the measurement of the calibration sheet or device used)
11. Set your z offset. Mine measured -2.7 so I used -2.71. 

    M851 Z -X.XX (X.XX is the z-offset you just measured)
    M851 Z -2.71 (is what I used)

12. Enable Soft Endstops

    M211 S1

13. Save settings to Eeprom

    M500

14. Set Active Parameters

    M501

15. Display current settings

    M503

16. Again, Tell the printer to go Home

    G28

17. Move the nozzle to true zero offset to see your result

    G1 F60 Z0 

Watch 3DMN demonstrate this in a YouTube video