Hello there!
I have a brand new K1 Max, I try to make my first print with a random file, first try I have some issue to make the first layer, reviewing some videos says the tube is bend to the extruder and makes this, I release the tube and the first layer goes perfect, but when begin to the next layers underextrude issues come.
I attach some videos for your reference.
I’m using the 5.1 Creality slicer version
Eliminiate all the obvious - clogged nozzle, etc, then… In my experience, underfeed is almost always down to the filament getting snagged in the tortuous route taken by the tube, or a kink in the tube, or a knot in the filament on the spool. The feed tube design is really not good in the K1, but they have done their best in trying to mitigate the problem. My main problems has been the path through the break detector being no straight which may be your case if it is difficult to thread, or a tight bend or kink in the tube to the head. Near the head where it bends down at a horrible angle (cringe) which gets even worse when you put the lid on. The other one is getting a crossover of filament on the spool. You must never let that filament go loose for even a moment during threading. If the end gets under a turn on the spool that is it - you have a knot. But a knot is more likely to cause a break, after a period of getting tighter and underfeeding.
BUT in your case, what on earth have you done to the feed tube inside the printer?. It is meant to be clipped to the cable chain evenly along it’s length, but your is almost unclipped. This will cause it to bend sharply where it exits the break sensor and, if you look carefully, I think your PTFE tube is kinked at exactly that point which will cause problems. You need to replace the PTFE tube and clip it evenly at about 3 or 4 places along the cable chain. Which tube to uses is a compromise. 4mm x 2mm has less internal friction but kinks easier. 4mm x 1.5mm has a bit more friction but is a lot less liable to kink, and is my personal choice. All sizes are easily available on Amazon.
There are some good alternative clips here
There are many other reasons for underfeeding. If you have not already got Sean Aranda’s book then it is a good investment and invaluable for solving printing problems. It is titled “3D Printing Problems”. It is printed by Amazon and
has an an ID number 41548014R00190.
Good Luck.
Optician
Thanks buddy I will print the clips!! I change the software version to the 4.3.8 and print corretly at 300 ms