RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
My A1 mini is 3x as loud as the Core One. Odd.
yeah, spent 3 hours with customer care, I'm returning it, have fun with your coreOnes 🙂 I stay with my a1 mini for now
yeah, my a1 is 1000x more quiet then the broken ass version I received, but yeah I had a factory defect unit and now I'm frustrated and can't and dont want to deal with that shit any more... I'm really happy for you, but for me the core one is now dead, will check it in a year or so again
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Something similar for mine, at different speeds, you have this annoying resonance, as i said somewhere else, im pretty sure its crappy motors, if i touch my motors during the "loud" moves, i can feel them vibrate quite a lot.
Here what mine sounds like:
You can see, at this speed, it is in the pure x and y direction, not at 45degrees. But in other speeds, its the other way around (only 45deg)
I have a completely identical problem with identical vibrations (sound).Yesterday I solved it with support and the only advice I got was a generic check of everything. (belts, pulleys, bearings)
I can't figure out where it's coming from.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Others have run the phase stepping and it's solved the house issue. I guess it's hit or miss if it will complete as it's not officially released in the firmware, but those who have succeeded have been happy with the reduction.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I had it works on mine, but I'm not sure the solution should be order an extra part (accelerometer) to get the printer to not resonate.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Others have run the phase stepping and it's solved the house issue. I guess it's hit or miss if it will complete as it's not officially released in the firmware, but those who have succeeded have been happy with the reduction.
I ran the calibration, "x vibration reduced by 90%, y vibration reduced by 87%". My VFAs are minimally better and some print moves are maybe a little bit quieter. But still the same vibration noise as in my video unfortunately 🙁 so no software fix for me...
Posted by: @petr-bojar
[...] I can't figure out where it's coming from.
Did you make any progress? You said you solved it, so is it gone?
RE:
I'm disappointed with the purchase of core one. This is mine after phase stepping calibration. I am going to see if there is a possibility of returning the assembled kit or selling it. I'll stick with my MK4S.
https://youtube.com/shorts/Tq9Y8v51dFs?si=y7Kf_GK3T_hX6rVe
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Others have run the phase stepping and it's solved the house issue. I guess it's hit or miss if it will complete as it's not officially released in the firmware, but those who have succeeded have been happy with the reduction.
I ran the calibration, "x vibration reduced by 90%, y vibration reduced by 87%". My VFAs are minimally better and some print moves are maybe a little bit quieter. But still the same vibration noise as in my video unfortunately 🙁 so no software fix for me...
Posted by: @petr-bojar
[...] I can't figure out where it's coming from.
Did you make any progress? You said you solved it, so is it gone?
I made some minor progress. I was also dealing with another problem at the same time. An imperfect first layer. After performing MBL, I always had the bed higher in the upper rear corner, and the print in that corner was poor. With the help of Prusa support, it was discovered that I had one bad screw under the Heatbedcover. When I replaced it with the correct one, the tension on the bed disappeared and the bed always levelled out well. At the same time, the aforementioned vibrations partially subsided. Probably because the bed on the Z-axis screws is now straight and not crooked.
RE:
I think we should always set the chamber fans to fixed 35%, when recording any noise videos of the core one, to have a reference for different audio levels from the microphones.
About the videos and phase stepping:
I just calibrated mine and while the pretty annoying "wooooooot" sound is still there for some straight X or Y moves at about 74 mm/s (the speed I used earlier), the pretty loud "wuwuwuwuwuwuwu" vibrations are mostly gone.
I could hear them happening during the phase stepping calibration, so I guess the accelerometer detected them and was able to get rid of them.
However, 39-43 mm/s resonate extremely bad in almost every direction. Seems to hit some resonance frequency of a mechanical part. Doubling that to 80 mm/s created the same nasty resonances.
Maybe the accelerometer doesn't pick them up (I'm not sure if the print head or something entirely different is vibrating at these resonating speeds. Touching anything from the outside doesn't dampen them at all..).
My new "Sweetspot" for speed vs. quality vs. noise seems to be 136 mm/s (Stealth Mode).
Faster, and the "mechanical noise" of the bearings etc. becomes a bit annoying, slower, and resonances start. Without Stealth Mode, the motors are quite a bit noisier and the 350 mm/s travel moves are quite loud.
But at 136 mm/s in Stealth Mode, phase stepping does a brillant job of reducing the noise to just "swoot, swoot".
Now I'd like to get phase stepping for the Z-axis... The ramping lift on some travel moves is by far the most annoying resonance now.
But maybe I'll just finally need to lube the leadscrews (don't really want to, due to a bit too much dust in the room right now).
I ran the calibration, "x vibration reduced by 90%, y vibration reduced by 87%". My VFAs are minimally better and some print moves are maybe a little bit quieter. But still the same vibration noise as in my video unfortunately 🙁 so no software fix for me...
Are the "wuwuwuwuwu" still happening (00:02 - 00:03 in your video)? Or did they become "cleaner" to the still kinda loud "woooooooot" ?
I'm disappointed with the purchase of core one. This is mine after phase stepping calibration. I am going to see if there is a possibility of returning the assembled kit or selling it. I'll stick with my MK4S.
https://youtube.com/shorts/Tq9Y8v51dFs?si=y7Kf_GK3T_hX6rVe
What are the print speeds during the loud moves?
My printer seems to be a lot quieter at fast movements now, but still the "woooot" like in your video, during some slower moves, especially from 70-90 mm/s, with the absolute worst being 80 mm/s.
Around 50 mm/s, the loud resonances are gone, but it's still almost louder, than at over 100 mm/s.
Seems to me, that the housing starts to resonate like a subwoofer at slow speeds and has peak resonance at some moves between 60-100 mm/s.
Maybe someone with the equipment and skills to do it, will work out which parts are resonating and how to dampen them effectively.
And I get it. If you don't want to or can print faster than that, it's way louder, than my mk3s (or your mk4/s).
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
My pre assembled CORE One did the same exact noises as yours at 80mm/s and about 40mm/s (for straight X or Y movements).
I tried many things but nothing helped.
I think that it’s linear bearings relative because my MK4 did that too, and when I changed the bearings for Misumi ones that had less play on the rods, every vibration noises were gone.
I tried to change the bearings on my CORE One to Misumi but it didn’t help so I began to think this could also be coming from linear rail.
Something is vibrating just a little, but enough at some specific speed to act as a buzzer.
I saw a guy on Reddit that replaced every bearing to Vesconite (linear gliding bearings). I wonder if it would help…
RE:
Ugh. This seems to be the exact same thing mine is doing:
Working through it with support there were not many ideas. We tightened stuff up, but didn't find a smoking gun. On my preassembled printer I had one stripped screw holding my linear bearing, so Prusa sent the parts to replace that bearing and new screws. I'm going to work through that replacement tonight.
I also ordered the accelerometer to do the phase calibration noted above, but it seems like that's not a complete solve either based experiences posted so far.
It's hard to pinpoint but is seems like the sound originates (for me) in the rear right corner where the stepper resides. I checked all those screws and they're snug. If I apply pressure to the metal bracket where the linear bearing connects I can silence it, but I don't know if that's because the bearing is bad or if I'm just dampening the resonance with my finger.
The sound is like nails on a chalkboard to me. You can hear it from across the house. It's really bad. My Prusa Mini is sooo much quieter you'd barely believe they're made by the same company. I don't know how I can possibly keep it if I can't quiet it down. Truly intolerable.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Honestly, those noises are way worst to me than VFA (belt ripples) issue.
I really cross my fingers that my kit that will arrive in a month won't give me that issue.
It's crazy how it seems to affect a minority of people, and if I had to bet, I would incriminate bearings.
RE:
If you don't mind, I will come back to the actual subject...
I talked here to the guy who changed his bearings to bushings (Vesconite), and he claims that he also get those noises at 80mm/s.
So it seems that it's not related to bearings.
That's actually a good and bad news. It's a good one because it's not related to bearings (so you can't get bad luck and get bad bearings), and a bad one because it's something else and no one knows the cause yet.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I would also double check all screws etc - I know its a long shot, and unlikely considering several have the same issue, but can't hurt. I don't seem to have this noise issue with my printer - I find it pretty quiet. Enough for me to run in my main house and not have the wife/kids moaning, so that's gotta mean something! The loudest part for me is the external exhaust fans.
It's strange how it seems to happen with certain axis though. Did I read somewhere that someone replaced both X and Y motors - not sure if that helped......
Would also be useful to know if these were mainly batch 1 units and something that has been rectified , or parts replaced in a later batch........
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Apart from the fans, my Core One is not significantly louder than the MK4S.
If I were to use the speed and certification values from the MK4S, I bet you wouldn't be able to tell the difference.
I run both of them in my apartment, and when the door is closed, you can't hear them anymore.
With the MK4S, I also had some nasty vibrations once, and the screws on the lower bearing of the print head had come loose.
I sometimes experience this kind of vibration with both printers during the first layer in certain directions. But after that, it's quiet.
When printing PLA, I just leave the lid off.
The input shaper measurement on both printers is interesting.
With the MK4S, I can hear the resonances very clearly. I can predict the result.
With the Core One, it is much quieter, almost non-existent.
RE:
I would also double check all screws etc - I know its a long shot, and unlikely considering several have the same issue, but can't hurt. I don't seem to have this noise issue with my printer - I find it pretty quiet. Enough for me to run in my main house and not have the wife/kids moaning, so that's gotta mean something! The loudest part for me is the external exhaust fans.
It's strange how it seems to happen with certain axis though. Did I read somewhere that someone replaced both X and Y motors - not sure if that helped......
Would also be useful to know if these were mainly batch 1 units and something that has been rectified , or parts replaced in a later batch........
Even when printing on structural profile simples shapes like here?
It mostly happen when straight X or Y axis print speed hit 80mm/s.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Im starting to wonder if this is a stealthchop/spreadcycle thing? Maybe the tickets drivers need to be tuned to a slightly higher x/y speed before spreadcyxle kicks in
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
While continuing discussion with the guy on Reddit, he told me:
I did some further testing and did some dummy prints without filament.
I think I have isolated it to the X Motor. When I disconnected the X Motor the noise went away. Then I disconnected the Y Motor on another test and sound was still there. So, I believe the resonance sound is linked to the X Motor.
[...]
I just unplugged it after the dummy print started. Yes it was going diagonal but still making the same sound. So the X Motor seemed to be making the resonance sound for my one anyway. Not sure its a bad motor as it seems a wide spread thing.
In his case it seems related to the X motor. I don't know if it could be a bad motor.
I think I saw someone here telling that it seemed to come from his X motor too. I don't noticed on the building manual that something is really different between X and Y motor...
I anyone could try to the same as he did to confirm that would be nice!
RE:
For those thinking replacing the bearing might fix it, I can at least partially confirm it does not. Prusa sent a replacement bearing which I got into the printer this week. No impact on buzzing at all. Now, I did only replace one side, and it was with another stock bearing, but if this was it I would have expected some change in behavior.
I used some of the new "CoreONE buzzing" models now on Printables to produce a more controlled test:
So no luck getting to a fix. Back to support I go.
I did order the accelerometer so I guess I give that a try too.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
So while printing a larger part today with a straight square base, I can confirm the extra noise on the straight sides. I don't seem to have it as bad as some of you guys, but it's there, and it's annoying. Almost like a dragging noise at some stages, and only at certain speeds.
Anyone know if Prusa have confirmed it as a bug?
This issue and the head banging at home calibration for ages are my two main issues at the moment.....
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
You can try to unplug X and Y motor one by one while printing to see it it’s related to one of them.
So while printing a larger part today with a straight square base, I can confirm the extra noise on the straight sides. I don't seem to have it as bad as some of you guys, but it's there, and it's annoying. Almost like a dragging noise at some stages, and only at certain speeds.
Anyone know if Prusa have confirmed it as a bug?
This issue and the head banging at home calibration for ages are my two main issues at the moment.....