Hello everyone! I came here in search of help with a very frustrating issue I am having. My Z offset isn't uniform across the bed (Some places are higher or lower than others). I have been having this issue since I bought my printer around 3 - 4 months ago. It seems as if the ABL is completely broken or it just doesn't do anything.
What I have tried so far to fix my issue:
Manual bed mesh creation (with cooking paper)
Automatic mesh creation (with magnetic probe)
Gantry alignment with calipers to the frame
Gantry alignment with an object to the bed
Gantry alignment with the magnetic probe to the bed
Gantry alignment with the built in function
Reinstalling firmware
Switching slicers (all had m420 s1 in start of gcode after g28)
Creating the mesh at different temperatures
Seeing if the mesh even is in EEPROM (it was there)
Playing around with Z offset
Switching PEI sheets
Tightening and loosening the x and y axis belts
I can provide more details or pictures when I get home in about 2 hours.