I have had a problem with my Vertex since yesterday. It sometimes seems that too little fillament is being transported. The stepping motor of the filament also sometimes turns a little backwards in the middle of a line printing as if the force for pushing through the filament is too heavy and the stepping motor decides to release the tension from the fillament.
I cleaned the extruder with a guitar string and started again. You see the result on the accompanying photo. Filament feeding problem So the problem still exists.
My question is therefore: who knows what is causing this problem?
FYI, my printer is from 2015 and works great. I only use Velleman PLA Filament (this one is 3 month old) and work with the well-known settings of 190 degrees, 72% and so on from Raby and WrongWay. The g-code file is already more than 20 times printed. My second extruder doesn’t have this problem.