Not on my KM but I swapped out the nozzle on my Vyper, which uses the same hot end.Hey Sean,
Have you switched out your nozzle yet? I just did on the Kobra Max to test out a 0.8m nozzle, but I managed to break off the brass nozzle and buggered up the whole hot end. I did the same thing on my old CR-10S so I'm thinking the factory must put in some loctite on the nozzles. When I installed a new hot end on my CR, I could switch nozzles easy, even after months of use.
Good thing is that the hot ends on this machine are not expensive. $20CAD, so I ordered a couple. One, I'll keep at 0.4mm and the other at 0.8mm. The hot end assembly is fairly easy to change, so it would make more sense than unscrewing the nozzles.
Weird thing, is that a hardened steel nozzle is worth about three times the whole hot end on Amazon, but they're supposed to last longer.
TazMan2000
AnyCubic has a video for the Vyper that basically has you heat up the hot end to its max temp, hold the block with a pair of pliers or something, and then remove the nozzle. Seemed to work for me without damaging anything.
Have you seen the new Kobra 2 Max? It’s only slightly larger than the KM, but has a few other upgrades. I’m seriously looking at replacing my KM as I have a 3D printed R2 project on the horizon…
Anycubic Kobra 2 Max
With a remarkable 500mm/s maximum printing speed and an expansive 88L printing volume, Anycubic Kobra 2 Max surpasses its predecessor, the Anycubic Kobra Max. This upgraded version offers a significantly larger size and faster printing capabilities.
www.anycubic.com
Sean