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According to the BLTouch instructions, the bottom of the plastic body of the BLTouch should be 8mm above the nozzle tip.

With the nozzle just touching the bed surface you can use a ruler or caliper to adjust the BLTouch mount until the base is 8mm above the bed.

Next we will measure the distance in X and Y from the nozzle tip to the BLTouch pin.

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