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.Calibration Cube 4134916 1280

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:

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
  4. Set active parameters
  5. Display Active Parameters
  6. Home your nozzle and show your Z-Axis
  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
  14. Set Active Parameters
  15. Display current settings
  16. Again, Tell the printer to go Home
  17. Move the nozzle to true zero offset to see your result
    G1 F60 Z0 

Watch 3DMN demonstrate this in a YouTube video



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