After some acceptable result with the enclosed filament (did an extruder calibration matching by 0.03 mm) except a massive stringing I changed the filament. After some attempts I got good results with Kaisertech blue. Today I switched to Kaisertech black and could not get that stick to buildplate. Spent several hours with changing nozzle- and bed temperature. Nothing worked. Then I changed to colorFABB PLA. Same result. Whether what I tried, nothing worked.
Getting back to the Snapmaker filament turned out to be working again…
— Is it necessary/useful to recalibrate extrusion for every new filament?
— What PLA brand is working reliable with the Snapmaker 2.0, and at which temperature for bed and extruder?