Print fail
Hi everyone,
I’m running into an issue with my MK4 printer while printing with PC carbon fiber filament.
I’ve already replaced the entire hotend assembly (heating block, thermistor, nozzle, etc.). The print starts out fine, but after a while the quality drops off — I see spikes forming, some layer separation, and generally inconsistent extrusion.
Has anyone run into this before? Could it be related to the material itself, or am I overlooking something else?
Thanks in advance for any insights!
RE: Print fail
I've seen reports that some filaments that have fibers in them won't print well with less than a 0.6mm nozzle. What brand of filament is it? It does sound like a build-up in the nozzle...
Prusa MK4 since Jan 2024, Printables: @MikeB_1505898
RE: Print fail
Another possible source of the issue is moist filament. PC is one of the filaments more sensible to humidity.
RE: Print fail
I've had two High-Flow obxidian nozzles clog up on me, printing carbon fiber infused stuff. Like clogged to where the cold pull won't work. I've switched my two small printers, coreone(upgraded from mk4s) and mk4s back to the non-high flow obxidian .4 nozzles. My XL still has 5 of the HF .4 obxidian nozzles, but I being cautious I have not printed any CF filament there since switching nozzles. In a different thread there was mentione of nozzle clogs in those HF nozzles. given the cost of those things (price + shipping + duty), it's not worth the cost. I'll take reliable over fast. I've been printing batch after batch of Atomic PETG-CF for the last couple days on the core one with standard flow obxidian and it's been working like a champ, no clogs. I had printed some pulleys for the coreone in PC-CF, XYPOLYER, and that worked pretty well until that HF obxidian nozzle got a partial clog and then the full unrecoverable clog. That was about it for me on HF nozzles.
RE: Print fail
If a HF/CHF nozzle ANY filled filament may clog it. The Prusament wood fill took out my .4mm CHF nozzle.