CNC mode, z axis levelling

Hi guys, i’m trying to mill a pcb with a Snapmaker a350 and cnc head.
Can i calibrate z axis to avoid the problem in the photo?
Some videos show a wood plate to mill to produce a level bad for axis z, but it’s trivial, i hope to can do it as in the print 3d mode…

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This is what you are looking for, unfortunately its no ready to run solution: