RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Hello, I have now received a response from Prusa. We would like to inform you that our Core One team of experts has reviewed your case. According to our technician's assessment, the noise behavior of your device is normal in its current state – we have not detected any unusual noises or malfunctions.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Has anyone already tried filling the linear rail beam (the thing holding the linear rail) with something? Having a hollow tube happily vibrating could be a problem, I imagine. Sand might not be the best option due to the holes, maybe a printed insert could work.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I think, that the xy-assembly should be as light as possible. So a solid carbonfiber-beem might be a good option.
(BTW : comparing the combination of a printed housing for the lm10uu vesconite bearings aggainst the original aloy-housing and the steel lm10uu bearings , the original is much heavier)
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Has anyone already tried filling the linear rail beam (the thing holding the linear rail) with something? Having a hollow tube happily vibrating could be a problem, I imagine. Sand might not be the best option due to the holes, maybe a printed insert could work.
I can see that being a very interesting test with steel copper or tungsten filament
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I'm not sure the rail beam contributes much at all to the noise. I've printed an hour long rectangle vibration test without heat or filament, so I could grab all parts with my hands without getting hit (after getting used to the same rectangle over and over again).
Touching/grabbing/pressing/pulling any part of the motion system doesn't do anything.
In my opinion, the whole motion system is working like the body of an acoustic guitar, with the motor (& belt teeth) inducing the vibrations into everything.
The only real "solution" would be to put something like these big pads for car doors onto everything it fits. XY-frame, Y-bearing-housing, side panels etc.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Hello Guys,
I have read this topic for some time since I have this exact problem with the noise. Exactly this noise.
What I did :
I re tightened the belts. Loosen them and retightened them. I used the Prusa app to re tune the belts. I do not put my phone on the heat bead , instead I put the phone with the microphone close to the belt while I "chip" it with my finger. I tuned them at 87 Hz.
After this the noise diminished about 20%..
Ordered the accelerometer. Upgraded the firmware to 6.3.4
With the accelerometer installed I did the Input Shaper Calibration. New computed values: X :MZV 46Hz. Y MZV 46Hz.
I could hear very clear during the calibration that at 46Hz the noise was very loud and the vibration had very big resonance.
After that, I did the phase stepping calibration. At the end of the calibration, the prompt shown an 86% reduction in ...something ( i forgot the term).
After these 2 calibrations the printer is 100% quieter. no more resonance, no more noise at circles or diagonal moves.
The difference is incredible!!
This is what I did, I hope it helps.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I have some first results: As a quick fix I stuffed some foam into the ends of the rail beam and put electric tape over the openings. I also put a layer of electric tape between the linear rail and the rail beam. I've done no measurements, but the sound of the printer seems to be quieter.
I have no guitar around, but I'm sure that touching the body doesn't change its sound much. Covering the openings should make a difference, though. I'll do some more research.
I'm not sure the rail beam contributes much at all to the noise. I've printed an hour long rectangle vibration test without heat or filament, so I could grab all parts with my hands without getting hit (after getting used to the same rectangle over and over again).
Touching/grabbing/pressing/pulling any part of the motion system doesn't do anything.
In my opinion, the whole motion system is working like the body of an acoustic guitar, with the motor (& belt teeth) inducing the vibrations into everything.
The only real "solution" would be to put something like these big pads for car doors onto everything it fits. XY-frame, Y-bearing-housing, side panels etc.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
There is rationale that as the rail beam is hollow it could potentially amplify the noise, using your guitar analogy. This is the role of the body of an acoustic guitar. However, the vibrations themselves are what are causing the noise, like the strings of a guitar. You can dampen what is amplifying the noise but ideally you address the root cause to prevent it entirely, placing your hand on the strings to stop the sound.
I ran phase stepping last night for the first time. I was very optimistic while it ran hearing the noise progressively lower during calibration, unfortunately when I ran my first print this morning there is still a very pronounced resonance on straight X and Y movements of the inner walls in structural mode. Likely linking to the 80m/s others have noted. For now I'll aim to orientate prints diagonal to avoid the noise but need to follow up with Prusa. Pity. Was very hopeful I'd get one of the Core ones with no noise, unfortunately I got one with both X and Y resonance!!
RE:
I'm moving more into philosophy now but I do wonder if this issue is even more common than we know. We assume only some printers are impacted but maybe most, if not all are.
I am likely more sensitive to the noise as the printer is also in my small office 1.5 meters from my desk. I have a tendency to print more practical items, that need to be structural and generally have more straight angles. All that increases my likelihood of resonance while printing. Contrary to this, there are many people who will prioritize speed over structural integrity as they don't need it. Many people are also more likely to print what I would call fun objects (toys, figures, cosplay items etc), these are more likely to have more rounded surfaces. Many people have their printers away from the general living areas. In all these scenarios, resonance is less likely to be noticed in their printers. It doesn't mean they have perfectly fine printers, just that they haven't noticed yet. And lets face it, since the boom of 3D printing in recent years, more people are likely to fit in this category then the one I sit in.
RE:
I finished building my kit yesterday.
Today I printed parts in structural profile with straight walls and noticed the noise too. I modified the profile to print walls at 90 mm/s instead and it went away. Of course it's always going to hit the resonance while printing at specific angles, but straight walls aligned with the axes are so much more common...
I ordered the accelerator kit, let's see if the calibration helps.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
So is there a fix? Prusa says so. They changed the structural profile to avoid certain speeds.
This does not fix the issue though.
https://www.reddit.com/r/prusa3d/comments/1mk0lz6/psa_quieter_core_one_structural_profiles/
RE:
In my experience, purchasing the accelerometer, installing firmware 6.3.4, ensuring the belts are properly tensioned and then running "pulse stepper calibration" quieted the printer a lot.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Tuned the belts, bought the accelerometer, ran input and phase calibration, updated the structure profile. Yes it is quieter but nowhere near as quiet as the MK4. Stealth mode is a joke. When I had my MK4S in stealth mode I had to literally go look to see if it was running, now I can hear the Core One a few rooms away.
It is really disappointing, the printer went from run during the day, to running only when I’m away from it. It has much higher pitched tones that are more annoying. It’s not resonance tones, just high speed shrills of the motors. I wonder if this is due to the long lengths of belt.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Tuned the belts, bought the accelerometer, ran input and phase calibration, updated the structure profile. Yes it is quieter but nowhere near as quiet as the MK4. Stealth mode is a joke. When I had my MK4S in stealth mode I had to literally go look to see if it was running, now I can hear the Core One a few rooms away.
It is really disappointing, the printer went from run during the day, to running only when I’m away from it. It has much higher pitched tones that are more annoying. It’s not resonance tones, just high speed shrills of the motors. I wonder if this is due to the long lengths of belt.
With the latest firmware and having run both the IS and PS tuning with the accelerometer, my CoreOne is very quiet in stealth mode except for a few resonant frequencies. As long as I don't hit the speeds that resonate, it is as you describe your MK4S.
If it does hit does speeds, it's loud and annoying. And it will hit those speeds on print sections longer than 10cm, which is more and more common now that I'm printing larger parts 🙁
RE:
My printer was very loud, with loud resonance and occasional rattling even. After replacing the bearings and a motor, I finally replaced the L brackets ("linear bearing holders") with a new set and compared them to the originals using a machinists square. The originals were both a bit over 90 degrees; the new ones are spot on 90 degrees.
It's like a new printer. EXTREMELY quiet compared to before on every movement, but especially those surrounding the 40 and 80mm resonant frequencies. Before, I didn't understand why people said input shaping or phase stepping were so great; I had the accelerometer, and my printer on a 50 lb concrete paver on top of foam, and neither made a noticeable difference.
Now with the correct perfect 90 degree brackets, the printer is 10x quieter. I can easily sleep with it in the next room without using stealth mode; before, even with stealth mode, the printer was audible through 2 walls during certain movements.
I finally realized this was the issue when I noticed that pushing "in" and/or "up" on the left bearing while running a 40mm test gcode made it quiet. I then put a thin shim on the screws between the bearing holder and the L-bracket, putting inward pressure on the linear rail, and this quieted the printer. It seems like when the brackets are above 90 degrees, they push outward slightly on the Y rods dramatically increasing resonance and noise. Even with slightly out of spec brackets, my gantry was able to be pulled square with belt tension, and I had very low skew on Califlower v2, which made me initially rule out the L brackets as a possible cause.
RE:
Try this. It really worked for me, the resonances are gone. My printer is totally quiet now.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
The issue I have is less the vibration of the printer, and more of the whine of the motors. Basically the same sound as if you manually move the print head around by hand, just higher pitched when running. Gantry squareness seems pretty good as when I move the gantry forward, and hold one side forward, the alternate side has very very little give against the frame. Tuning is fine, and when homing it typically just bangs the head twice when doing the diagonal.
I'd love to see/hear a video of a 'silent' printer. Maybe the MK4S spoiled me, as I still cannot be in the same room as this thing when it runs.
RE:
After talking with support for a good hour, and two videos later, I am told the excessive noise the printer creates is normal. The videos were considered all "normal". The line I was given by support was "the Core One is not a quiet printer . . . prints should not be expected to be quiet." So I agree with the original poster's comments, even after all the tuning, the Core One is not suitable for a home environment.
I define 'quiet' as less than 60 db from 5 feet away. For context, most home AC compressors are 60-65 db from 5 feet away.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Hi all,
For anyone following this thread go looking at this new thread on the new tuning method for the belts. I found it's made a big difference on the noise for me.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I do think the faster movement of the head is a general trade off for noise in a Core XY versus a Bed slinger. For me stealth mode drastically reduces those higher pitch noises from the fast movements. But I don't think it can ever be as quiet, but you are getting a faster printer with enclosure for the difference.
I have never used an MK4s but I do have an Ankermake M5 and believe me the Core One is night and day different on stealth mode. I have both about 1 -1.5M from my work desk. I could barely use the ankermake due to the noise levels distracting me in calls, but the Core one is easy to forget about on stealth mode. Since I've added the advanced filtration unit, for PLA and PETG it is far quieter. For PC, I barely notice it at all as the fan barely runs.
Ankermake M5 just isnt being run anymore... quality difference has a lot to do with that also!
The issue I have is less the vibration of the printer, and more of the whine of the motors. Basically the same sound as if you manually move the print head around by hand, just higher pitched when running. Gantry squareness seems pretty good as when I move the gantry forward, and hold one side forward, the alternate side has very very little give against the frame. Tuning is fine, and when homing it typically just bangs the head twice when doing the diagonal.
I'd love to see/hear a video of a 'silent' printer. Maybe the MK4S spoiled me, as I still cannot be in the same room as this thing when it runs.