bottom layers problem

[palidzi]

Hi,I have problem with my prints on my ender 3 pro. I didnt find any common issue on internet so I posting it here. Hope you will help me to find solution. As you can see on photo, I have problems with few bottom layers. Any idae what I am doing wrong?filament PETG, 220/70°C, glass bed, 0.4mm nozzle, 0.2mm layers, cura slicer

[3dpp]

Is there any elephants foot compensation enabled? Have you always used the printer in its current state or have you recently done an upgrade? It almost looks like z banding, but I dont think thats what it is.

[3dpp]

I wpuld also check the z axis coupling, and make sure everything is square and tightened up. Check the movement on the first 10 layers with a dry run, and you could also look for any weird layer settings for extrusion.

[palidzi]

thank you for your answer.Printer is in same state as it was. I didnt have these kind of problem when I use PLA. This problem only happens when I use PETG. I didnt use elephants foot settings but when I did it was with the same problem..

[liderbug]

I think I have a similar problem. I placed a straight edge across my plate an there was light under it at the center - A couple of thousandth. When I did the paper strip under the extruder at the center my 1st (2d, 3d) layer came out perfect. Of course the extruder scraped at the corners.