Word of disclaimer-- I’m coming from the world of using Makerbot 2/2x’s which, in my experience, worked absolutely great. I’ve consistently had 90-95% success rate on prints large & small for the last 2+ years.
Now-- I’m learning the world of Cura and I’ve gotten 1 successful print on 10+ attempts these past 2 weeks. Nearly every print starts well-- first layers look good etc… but after 2 hours or so I’m getting nozzle clogs. I’m printing Lulzbot white 3mm PLA at 205C with layer of .12mm and have minimized retraction to 1.5mm @ 25mm/s speed with minimum move of 4mm after thinking retraction was relentless and eventually pulling too much heated filament upwards. I’ve measured the filament at 2.94mm with .35 nozzle at 30mm/s print speeds. Something is happening after 90 minutes where extrusion is slowing down and I seem to notice that things are going badly in the infill first-- as though the infill extrusion width is getting thinner. There are no visible obstacles to the filament & the spool seems to be unrolling fine. Any suggestions would be welcomed. It’s infuriating to have prints looking great for the first 6-10mm and then failing. I am getting the ground notch in the filament when this happens and have to clean the drive bolt each time. Images attached.