Hi! I am having this issue with "shifted layer or under-extrusion"?.
It happened in my last two prints which were around 40+ hours. Orange one is 0.25 nozzle, PETG prusa, white one is 0.6 nozzle PLA, aurapol filament. Print does not looks like shifted but its like a missing layer. It is a different height and happens only once in each print... I really dont know what to look for. I tought its a tension belt problem but values in menu are ok.Slicer settings is standard, nothing special so I suppose its a hardware problem but cant find which one.
I have also noticed that in the print I have several black spots which is burned material if I am not mistaken.
Any idea what to check and how to improve?
Please show us your nozzle/hotend assembly from at least two angles.
Holy crap. That hot end is leaking like a sieve. You need to clean that all up and re-assemble with a proper seal between the nozzle and heat break. It’s likely that your leaky nozzle is what’s causing the inconstant flow and as such your under extrusion. The plastic that should be on your print is leaking out the top and the bottom of the heat block.