Hello nice people. I hope you’ll be able to help as I’m starting to lose hope here.
I have gone through the whole forum trying to figure out what is going on with my K2.
Bought it for Chrismtas this year and ever since then all I get from it is uncertainty. I have never had a confidence it’ll print from the start to the end. It sometimes does, don’t take me wrong, but am I doing something wrong or what.
Using Creality Print.
Before the printer was even deliered, I have ordered 10 KG of various Sunlu filaments. Yes, begginer, so PLA only. 5 x single color PLA and 5 x double color Silk PLA.
All first prints failed. Even Benchies didn’t print. I’ve seen various error on the printer on the first day. Didn’t gave up. I’d say learning process. Started working on print speeds and temperatures and situation improved. I can now print a benchie 
My issue is random and on bigger prints. Printer stops extruding filament in the middle of the prints. Sometimes it stops and I find it with errors: Looks like printer is printing without a filament and similar ones.
Sometimes it stops extruding filament for like a minute and then resumes as if nothing. This is sooo annoying especially when doing bigger prints. It can do that at after it printed 50-60% of a print that’s bigger in size and takes 10+ hours to print. I then have filament ruined, print to be thrown out.
I started blaming the filament and the quality control while producing those filaments. What really messed my head was that I printed a print scrapper with white Creality filament that came with a printer. I printed it on 100% speed without predefining any settings directly from printers menu. It printed just fine. At this point I was 100% convinced it’s the Sunlu Filaments that are the cause. Started reading online about Sunlu as a brand and found multiple users saying their printers are choking from these filaments.
I went and bought Creality Hyper PLA black with RFID and started printing with confidence. Allowing the printer to print on the speed it wants and the temperatures predefined under under Creality Hyper PLA profiles. First print came out just fine, bigger print too. But then it all started again. I’m now finishing off that same original Creality Hyper PLA spool and prints keep on failing with the same behavior. I even reduced to 50%, still fails. Now printing on Silent setting and it does that too. I’m not sure where the problem is and what to do. It fails on larger prints pretty much with any Filaments, doesn’t matter if printing on cheaper ones or Official/original Hyper PLA of creality.
Errors experienced so far:
CZ2768 - Z-axis homins issue, you may have an external disturbance
TR2852 - Filament detector triggered abnormally…
TC2841 - Cutter might be jammed. Please try again after resolving
Print failed due to unknow error
XS3000 - System error, try restarting
FO2845 - Extruder may be clogged.