Always grinding noise from Chamber Heat Circulation Fan area ? H2D+fw_1.03

Bambu Lab H2 Series
1

This is true at idle and during prints.

I’m not testing any of the beta 1.03.■■
it’s 1.03.00.00
Just updated from the last stable (I think?) 1.02

I did this via thumb drive on LAN mode.

Did calibration process twice.

I think I am referring to the correct fan… it’s the one beneath the exhaust fan with Louvres (flaps) correct?

It also is definitely on slightly. Is it supposed to be on 24/7?

I did mess with the exhaust/filter post print new feature, but ended up turning it off before printing anything. I’ve done a couple prints at least now. I’ve turned machine off and one, multiple times, leaving it for over a minute.
Noise starts immediately as soon as machine is flipped on… immediately .

Thanks guys. any ideas would be great, but this is also just a report.

2

In your Air Management menu, you can turn each fan on and off when the printer is sitting idle. Do this and try each one to see if the sound happens.

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3

Hi @CarbonForge ! Yes, that was what I did in the end to narrow it down… no other fans change it, but it seems to go away with the cf b/c it’s ramping up, and we can’t really control the speed unfortunately, so with it at high I cannot hear that specific sound, but ofc fan sounds change with speed…

Do you know, is it supposed to run 24/7?

Is the grille on the back of the machine intake or exhaust for the chamber fan, do you know?