I have been getting these lines where there seems to be not enough filament extruded accompanied by some clocking noises (not really grinding). Recently I got a few errors about stuck filament as well.
I did a few cold pulls but there wasn't any debris to be seen and the three ends (cht) were clearly visible.
Noises, pattern and errors persist.
Pla, core one, max layer with 0.4 nozzle.
Any help appreciated
Edit is the image not loading for everyone?
Maybe a rebuild will fix whatever is causing this. Because when you experience:
That does sound like a strictly a failure in the filament movement system. And I can only think of
And since clearing the nozzle didn't work, and you don't find signs of grinding, nor observe temperature swings, then I'm out of ideas.
Do you happen to have spare nozzles? Maybe try swapping the nozzle and see if it was still clogged? I've had nozzles that I just couldn't clear.