I was checking cutter similarities between the K2 series and the Creality Hi. I tested both cutter blades from Creality Hi and the K2 series. I had an extra K2 extruder and tested the cutters. I started with the K2 cutter and it positioned itself correctly and could be manipulated easily back and forth. Next I took the Creality Hi cutter and inserted it into the extruder and it gave me resistance until I got to a certain point and then cutter went in and covered filament opening on extruder and could not be manually moved in slot. I had to forcibly remove it. I tried this with several Creality Hi blades with same results. The polarity of the cutters are different.
Video was too large for forum so I have downloaded the link for video:
There’s a very easy solution for that: just take the magnet out of the extruder, flip it over, and that’s it. its just the polarity of the extruder magnet (NOT THE CUTTER) just the magnet of the extruder
not gonna lie, i almost went in panic when i saw your post and i was like, oh no what the hell im gonna do with my 5 new cutters, will i be able to remplace? then i remember the thing about the polarity of magnets LOL. i hope this helps you. I never changed my cutter, i have almost 300hs on my creality HI, do you think i need to remplace it? how often you do? in my 300hs, i never got a problem, never got a clog, never got filament stuck nothing, im even printing on PLA FLEX, and have no problems at all (im not using spacer, i think that is for TPU only) but i can only print PLA FLEX with 0.6 nozzle and a maximuim of volumetric speed of 8ms