Quieting down the nextruder buzz
I had a few parts buzzing and rattling on my nextruder assembly. I manged to find the two main contributors and quiet them down significantly. Check it out if you have a noisy XL.
RE:
Nice work! I tried to leave a comment on your first video, but for some reason my comments never post. Got to love YouTube.
I opened a conversation with Prusa last month regarding a resonance coming from the dwarf cover area. They told me they are working on a fix and Input Shaping will also help with the sound.
Regardless, I tore everything apart on the extruder and came to the same conclusions as you did. I put small round rubber pads on the bracket behind the part cooling fan, and I put the same pads on the dwarf cover. It's darn near silent now.
https://www.youtube.com/shorts/s5tw8pf_MK4
RE: Quieting down the nextruder buzz
Nice, yours does sound very good now. I would love to see what prusa comes up with to quiet things down, but I am satisfied with my noise level and have moved on to trying to print as fast as possible before print quality breaks down.
RE: Quieting down the nextruder buzz
Will def be trying this later today. I hadn't noticed it until I started printing a large piece with rectilinear infill and man, it's buzzing like crazy. Also, it's noticeably louder the closer the extruder is to the center of the X axis / gantry, which I suppose makes sense, since there's more opportunity for vibration/resonance the further the extruder is from the axis mount points.
RE: Quieting down the nextruder buzz
Added a strip of earplug material between the fan/blower and the metal frame of the extruder. Also added some little circles of earplug at each of those metal twist mounts for the board. Certainly helped. I also found that tightening the hinge screw for the flip-up cover helped a bit as well. Not perfect but good enough for the moment. We'll see if it's common enough of a prob to for them to release a modified shroud design.
RE: Quieting down the nextruder buzz
Glad it worked out for you. A lot of it could be fixed with some printed part design changes. I think that adding flexible materials will still be a quieter solution. It has been a few weeks and the noise is still gone.