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Yes, lubricate inside the nozzle, if its hard to take out unload the filament and use a syringe.
Only 2 things come to mind here:
1) Bad material qualify (can happen if you store the filament without a sealed container in an especially moist environment)
2) You extruder motor is intermittently skipping steps
Potential things to try:
1) Try with other materials to see if it’s a material specific issue.
2) Wipe the first 1ft of the filament with a thin layer of Olive oil before reloading it in the machine.
3) Clean out your extruder gears and nozzle.
2 years later
I am trying to achieve a “rough” texture on a automotive part that I am printing. Any ideas how I can do this? Thanks R
Over-extrusion usually produces blobs and zits on the surface, though you’d have to watch for buildup on the nozzle.
If using cura you can experiment with the fuzzy skin settings. https://ultimaker.com/en/resources/20426-experimental 102