I'm doing a large print, and about 1/4 of the way through, I started hearing this horrible, intermittent noise. Sounds very close to nails on a chalkboard. Naturally I assume something is starting to wear out (belt, roller, motor, etc) or there's some parts rubbing together that shouldn't.

The print seems to be going along fine, though, so I let it be until I couldn't stand it anymore.

Finally sat down and watched it, and the culprit is the extruder fan blowing into the large, hollow tree support bases which was acting like a whistle. lol.

I've only been 3D printing for a little over a year, and this is the largest print I've ever done so far, so if this is normal, it caught me totally off guard.

This is approximately where it is in the print. Every time the head moves over any of those support bases, it sounds like nails on a chalkboard 😆

Get with this guy, and we'll hail you as a clever bastard!

Never experienced that, but DAMN, that's ... interesting?

Can someone generate a support method that’s basically just pan flutes holding up my print so I can get a neat lil lullaby that will get imperceptibly deeper in pitch every layer line as I sleep?

This has happened to me before, it always spooks me until I pay attention to it. Also this really only happens to me with finer infill settings, seems that when a hole gets too big it doesn't resonate anymore

Cool video, but damn put a noise warning on that mofo!

Nope, just nails on chalkboard.

Sleep well

Yeah that sound is always horrible and makes you jump and look what's wrong, while actual problems often aren't as loud or even noticeable lol.