I’ve had my K1 Max for over a year and just recently started experiencing this issue. When the purge line starts at the beginning of the print, it’s grinding into the bed, and if I let it continue, it stays at the same level. Adjusting the z-offset helps, but many times, the offset changes with each print.
What I’ve Tried: power cycling, running through leveling, starting with calibration and without calibration, reverting the firmware the the previous version.
Modifications: Textured PEI sheet, and a MicroSwiss hot end, still running Creality firmware.
This issue started after the MicroSwiss upgrade, but was not immediate, so I don’t believe the hot end change caused it. I’m wondering if there is some sensor that is damaged somewhere that I need to replace, but I have no idea what or where. Any advice or help would be appreciated.