Auto leveling problem

[d3ing 0]

Dear all,

today I ran auto leveling after a long time of printing without problems. I did this routinely, not because anything had failed before. The process completed without any errors and I started a print. It turns out the printhead is now too close to the bed, sometimes even scratching on the glass, ripping the print off. It also looks like the level is different on front and back of the build plate.

I tried auto leveling a few times which all went through fine, but the result stayed the same. Then I removed both print heads, put hem back in, performed manual leveling, and after that auto leveling again. Same result.

What can I do?

 

Thank you.

 

Best

 

Christian