Prusa XL trumpeting like an elephant
Just received my Prusa XL with 5 toolheads (semi-assembled) and it does feel like being a beta-tester.
My current problem is that the printers is emitting an almost trumpet-like sound at certain movements, very much like
here:
https://www.reddit.com/r/prusa3d/comments/18dsnlx/got_my_xl_and_looking_for_a_way_to_lower_the/
and here:
https://www.reddit.com/r/prusa3d/comments/152j5r1/prusa_xl_sound_reduction_effort/
There are some suggestions in the comments that basically end up ripping the extruder apart and filling it with dampening material.
Is everyone having these problems? Is this fill-everything-up-with-material really the only way to go?
Compared to my two previous i3 Prusas this machine sounds like a bad joke...
I obviously re-tightened all screws but the sound seems to come from the extruder itself.
RE: Prusa XL trumpeting like an elephant
yup, same here..
especially on diagonal movements it really sounds bad.. i don't thinks its the extruder causing this, for me it sounds like the complete upper frame getting into some sort of resonance, kinda like when you stroke the bow over a violin... it starts to "sing"
RE:
I have the same problem during certain movements. In my case the noise came from the metal frame that is covering the belts. The 'trumpeting' sound decreased considerably after I held the frames with both hands. This is not a permanent solution of course 😉 .
Still thinking about a way to dampen this kind of vibrations.
RE: Prusa XL trumpeting like an elephant
Well I have that too. An easy workaround is printing, which of course leads to the print being slow.. Prusa already stated that this is normal behavior which is not optimal to be fair. My personal hope is that at some point this might be fixed in SW, for example by countering the resonances with slow fast iterations. Of course the challenge would be to implement this without sacrificing a lot of speed and quality.
I can not speak for other, but in my case it sounds really bad if one is use to silent Prusa printers, but compared cheapo old printers it is still okay - especially in relation to the speed.
RE:
I would recommend a test of speeds from 10 to 100 mm/s (and beyond, as far as relevant for your use case) in 10 mm/s incraments at low and heigh Z.
It is not necessarily so that high speeds lead to the worst resonance. For my Voron for example it seems 50 mm/s is the worst i regards to resonance (but nowhere near as bad as reported here with the XL) but both, slower and faster don't have have that resonance are pretty silent.
If it is really just a narrow speed range where it occurs, it would make sense to create speed settings which evade it by either going higher or lower as needed.
Mk3s MMU2s, Voron 0.1, Voron 2.4