[EDIT: It turns out, that the heated bed is totally warped in this area.]
I have a weird problem with local flow inconsistencys. My first thought was, that the first layer just doesn’t stick to the bed, in this specific area. But even the following layers show a discontinuous flow of material. Some missing spots of the first layer got covered, but also new faulty spots appear.
I actually can see and feel the extruder motor step back, right in the middle of the print. The unwanted retractions only occur between ~X150 and ~X200. The rest of the print looks pretty nice.
-Standart Prusa Settings for PLA.
-Bed is reconditioned with a kitchen sponge and cleaned with Acetone and IPA.
-Same failure with different CAD models, Slic3er PE versions and spools of PLA
-hobbed extruder pully looks ok (and if not, the failure would appear more often and in more areas)
I’m running out of ideas. Hopefully you don’t