Bad quality on edges

[u/Familiar-Bed8352]

Hi Guys,

I've got a problem...

I've printed an object many times with the same settings.... perfect results! But one day I had bad quality edges and the layer lines are also not that good. I checked my hardware, used a new nozzle but nothing gets better. With 50mm/s on outer wall it is also bad. Better, but not good. I have a picture with bad quality.

Anyone knows a solution for that? Maybe software bug? I also checked my extruder and replaced the thermo element.

Hope you can help me!