I have a Creality K2, and most of my prints fail because the filament gets jammed on the spool and the printer continues printing with no filament. Is there a solution to stop this from happening? I mean that printer see that filament is blocked and stop print.
but better filament, normally low name brands trend to tangle.
You can manually respool your current spools with a easy to print machine winder to be sure the filament is not tangled.
Hello @user4164528026 
Welcome to the Creality Forum…! 
I always manually unwind a little of a new spool before setting it up to print just to make sure it’s not tangled up somewhere. Also when loading it up never let go of the loose end as it can get tangled up when it unwinds being loose. 
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