@Martin1454 said in
Im pretty sure non of the corners is dropped - But even if one corner is lower, shouldent the whole system stay "parallel"?
Im wondering if the M561 in my HomeZ.g have anything with the offset to do?
I don't believe so.
Level is the average of the 3 points that you are probing.
Flatness is what mesh bed leveling is trying to improve.
If your motion system is not parallel to the level plane, then nothing you can do to fix it. Imagine if you have sag in your gantry, you will have a hollow that the controller will try to fox by filling it in wich makes the problem worse.
Not knowing your machine or machanics, I am imagining rods with holders, try loosening and then retightneing the rod holders, or if you can, loosen and them shim them 'down' with a shim of known thickness just to see what the effect is. Even the thickness of a piece of paper will show you clear results.