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If you are using Bltouch and Ender 3 the Z offset in the firmware code should always be zero.

The physical Bltouch retracted/extended height difference from the nozzle must be within the specs in the Bltouch manual. You can adjust that using washers or different brackets.

If everything is alright the Z-Offset from the LCD menu should be something between - 0.2mm to - 2mm.



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