Hello, my school had 8 people purchase K2s and have been able to print using the CFS system, but none of us have been able to priint using the spool holder because the filament won’t pull through when it starts to print. It seems like it has loaded, but nothign comes out of the extruder. Anyone have an idea why?
Buffer! does the spool holder pass the material when you MANUALLY push it through? The spool holder only servo is at the extruder, and you have to push it there and engage the extruder while pushing.
Sorry, need to start with the basics. 1) The end of the feeding filament is straight not bent or looking for the way out? 2) The cut is clean and not flaired larger than the core. 3) The cutter is verified loaded right side up as the magnets are biased and the larger counter sink needs to be down. If not, the blade does not retract and blocks the hole. I use a small skinny dental tool with a micro nib end to reach the magnet below the fan, to draw the magnet out and it jumps right back in to check it is upright and moving freely. If you push on it and it barely or does not move it is stuck probably cutter upside down. (4) The feeding lines are not excessively long and not to short that corners are to tight allowing the filament to grab and torque on the PTFE tube at any connection. Bends need to be gentle. (5) Go back to CFS feed to verify extruder and needle is flowing and clear. If CFS fails, disassemble inside the cabinet under a cloth as the spring loves to fly! I have a small button head screw in the insert for what was a spring force adjustment they quit supplying. Loose a spring and you are waiting for a new gear box from Creality. They do not yet sell the spring separately. Google and one eBay person have the specifications for the spring and a replacement, but eBay wants 2/3 the price of getting Creality with extra parts. I have exhausted finding a spring at the specifications even with the part number. So, I bought 6 springs at $5 a piece by offering on eBay. If CFS still does not work with the gear box off, you can clear the nozzle/needle with the large rod supplied. I have no luck using the acupressure needles they are fond of supplying. I heat the large rod needle with the system settings and a butane torch you get the needle in the melt and work between the melt phase at what will grab on the needle. I have once out of 10 cleanings had the need pull a complete slug after freezing the slug and turning the heat back on to the LOW end of the melt range. Pull to hard on the handle and it will let loose. Just heat the end and reinsert to the handle. I have only problems to report going over the recommended temperatures. Having spare nozzles is easiest then clean them as a batch. I have used needle nose to grab the wire for more force. Use the manufactures standard setups as much as possible. Equipment install has all the nozzle sizes and unlocks the auto loading of the supplier default material setups for each nozzle.
Every setup is done through a complex set of tuning tests of temperatures (melt, bed, and chamber if available), speeds, accelerations, acceleration profiles, and Suck backs. I say let the pros qualify new materials, sticking with the Company known ones does have value if you do not have the time to call it a hobby.
Back to the problem. The buffer is cycling fully when running CFS? The spring if crushed loses buffer range of travel. I had to disassemble to expand my buffer spring. If you do the same the spring has no guide, so elongation needs to stay straight inline.
That is all I have without more specific symptoms. I have printed a bearing spool holder for spool holder. I am still not happy with the community solutions. So I have it on my list to slicer two or more solutions into one. Good bearing solutions and good multi spool size solutions but none having both well that I have found.