PA6-cf, and pet-cf breaking in extruder
I’m trying to print some parts on my enclosed 5 tool xl from ppa high temp nylon 6 with 20% cf fill on a .6mm obxidian nozzle.
I first dried it at 70C for 12 hours after pulling it from the factory bag. It’s printing straight from the drybox which is still 70C. I keep getting extrusion failures mid-print which don’t trip the stuck filament sensor, due to the extruder breaking the filament.
i have tried fiddling with the extruder tension, backing it way off seems to help some.
Chamber temp is around 40c. Nozzle temp won’t go past 290c(i thought 300 was the max?)
i have tried 6 prints at varying layer heights from .15 to .25 and varying speeds from 30mm/s to 90mm/s.
I have had similar issues with pet-cf, pvb, and pva, mostly from polymaker, and also from sirayatech.
I need to get 5x 5hour prints done for a client by monday, so any help would be much appreciated