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Printer is A1. Fillament is sunlu PLA matte, tried Bambu PETG basic
The first layer seem very lumpy, does not stick to plate well.Tried cleaning plate, tighten the four screw behind the hotend assembly. Tried lowing and raising nozzle height offset with gcode.
Any potentially useful information that is related to the problem
ok figured it out. i put in some cheap harden steel nozzle, once i put back the original stainless steel nozzel it was fine.