NOISY Core One
Hello, anyone know why this core one is being so noisy? I've wiped the linear rail and re lubricated with prusa linear rail lube and i used the new belt tensioning feature to tighten my belts good but it is very loud?
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RE: NOISY Core One
This doesn't sound wrong to me - it once did but you get used to it...
For an experiment, try adjusting the speed from the front panel. It may shift the "noisy" features slightly in frequency. But for a more systematic way to quiet it down, check "stealth mode".
Input shaper calibration with accelerometer may help (the input shaper finds resonant frequencies and suppresses them in the stepper input). And maybe this particular noise even improves with time (the rattling, not the high-pitched whine). At least I got that impression on my core one.
RE: NOISY Core One
redo the calibrations in the menus, it helps a bit.
See my GitHub and printables.com for some 3d stuff that you may like.
RE: NOISY Core One
Doesn't seem too healthy to me. I'd work my way around the unit and ensure all screws etc are secure as a starting point.....
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I have that noise too.
This weekend, I finally want to try a few things to see if I can fix it.
See here:
(PS: I haven't attached any videos to this post yet, but the sound is exactly the same as on my C1.)
Quick start printing for Prusa XL and Prusa Core One
Comfortable display working height on the Prusa Core One
Reducing metallic resonance noises on the Prusa Core One
RE: NOISY Core One
The noise seems to occur upon X movements (at specific speeds), which would suggest that it is not tied to one of the motor/belt drive chains, but to the toolhead. The Nextruder covers or fan shroud seem like plausible candidates. I would start by checking that the respective mounting screws are tight, and maybe jamming some flexible/damping material under the covers.
I have seen a detailed exploration earlier -- nor sure whether it was on this forum or some blog? -- where someone had experimented with adding damping materials and redesigning some printed Nextruder parts for a tighter, vibration-free fit. Can't find that anymore though. Does anyone happen to have a link in their bookmarks?
RE: NOISY Core One
Generally this is a sound when movement aligns with the resonating frequencies of some parts - some of them are way louder and prone to resonance.
Rechecking al the CoreXY frame screws, belt adjustments, and other calibrations should help. You could try to grab/push certain parts when it happens to see which one are affected. Another option is to add extra mass to certain areas, which would lower the resonation frequencies.
This sound is nothing in comparison to the specific frequencies my Prusa Mini catches when moving the Z axis - you would literally be scared when you would hear it for the first time
See my GitHub and printables.com for some 3d stuff that you may like.
RE: NOISY Core One
My printer recently started getting noisier. Re-lubing the linear rail helped there is still some resonance in the Y axis and probably the only remedy is pulling the linear bearings and relubing the insides. Recently I saw a post where someone replaced the Y-axis smooth rods with linear rails. Not sure if I want to go to that expense (yet).
RE: NOISY Core One
I am having this exact same problem and it is driving me bonkers. You can hear it very clearly in this first video:
https://photos.app.goo.gl/DFjGXk3nKM4Hpeuf7
In this second video, you hear it briefly, until it switches back to infill mode:
https://photos.app.goo.gl/TKy6vBcJN4y5K1gB6
I have noticed it most strongly when the extruder is moving at 45deg towards the front right corner of the printer. It also depends on the speed. I can hear it when it is doing the first/inner top layer, as well as when I invoke a manual move in prusa connect. Faster moves, or moves in other directions don't seem to trigger the resonance.
It sounds like a loose screw, but I can't locate it for the life of me.
I've reached out to Prusa support. They suggested checking the screws on the linear rails as well as all over the print head, but I've come up empty so far.
Any suggestions are greatly welcome, as it is hard to sit in the room with the printer when this happens.
RE: NOISY Core One
I do nto have this issue and have three Core One printers.
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Chuck H
3D Printer Review Blog
RE: NOISY Core One
The most I have done is re lube all rails, ensure both belts tightened properly and checks screws that are visually available. I really dont want to take everything apart just to re tighten every single last screw to possibly fix the issue. Currently crossing my fingers for someone from prusa to have found and solved the issue within the farm. :/
RE: NOISY Core One
Did you buy yours fully built or build them/ upgrade to core one? I personally upgraded a mk3 to the core one. Don't ask why long story haha.
RE: NOISY Core One
Dave, was yours a kit or pre built? Just trying to narrow things down. I upgraded an mk3 to core one so lots that could go wrong I suppose but I followed the instructions very thoroughly.
RE: NOISY Core One
I suspect it's artifacts from the control signal, I'm hearing similar sounds now and then.
It might be (please correct, not my field of work) the difference between stepper phases. Coil A is pulling forwards, Coil B backwards and the motor drive algorithm interpolates between them. In rotational direction forces cancel out (ideally - as calibrated) but there are other axes where the two vectors are not strictly opposing each other and that turns into noise.
This may depend on the stepper - my X axis motor sounds very different from the Y axis motor. I noticed this immediately when taking them out of the box and turning the shaft. Doesn't affect print performance, though.
RE: NOISY Core One
Mine is a Core One L, so it was prebuilt.
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As mentioned above, did you do the phase stepping calibration? It had helped alot with some noise on my C1L. Also check every single frame scew on the C1L, every single one of them was lose from the factory. Prusa' s QAQC is basically non existent. I assembled my MK3 6 years ago, Zero lose screws, I used purple loctite.
Mine is a Core One L, so it was prebuilt.
RE: NOISY Core One
I did do phase stepping calibration. I have checked every bolt that I could reasonably see, but am going to do another pass this weekend.
RE: NOISY Core One
Quick update for future readers: my belts were quite loose. I used the belt tuner to try to repro the sound, andd my belts were resonating around 65hz (and so was the noise). They are recommended to be between 85hz and 95hz.
Once I tightened up the belts, the noise mostly reduced. I can still hear a faint hum when performing bridging infill, but it is very tolerable - less than the noise of the motors and fan in general.
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So I tightened all my screws in the linear rails, pullys, frame, and this is after doing the belt tightening thing in the settings and it told me they didnt need to be tightened. Its still making this noise and im about to retire it because when it gets going fast it is so hard to listen to :/