Just got my first 3D printer (Kobra S1 Ace 2 Combo) and had a minor heart attack 😅
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Got everything unboxed, put together, and fired up. Right as calibration started, this constant, awful noise kicked in and didn't stop. Since this is my first printer, I had no clue if it was normal or if I was about to blow something up.
Even after calibration finished and it was just sitting there doing nothing, the noise kept going.
I called a buddy of mine who has the same printer and sent him a video. He immediately told me, "Yeah, that's not right." He had me double-check that I removed all the transit screws and that nothing had fallen inside. Everything looked clear.
So, I ended up having to tear the entire back panel off the printer to investigate. Turns out, a black ribbon cable was rubbing directly against the left fan near the motherboard and power supply.
I’ll drop a picture of the fan in the comments. Thankfully, I caught it after the machine had only been running for half an hour or so, otherwise it might have chewed right through the cable and caused a way bigger headache. The cable is a little scuffed, but not severed, so hopefully it holds up fine.
I gotta tell you though... the sheer panic when a brand-new printer sounds like a dying air compressor is not good for the heart lol. Anyone else run into something like this out of the box?