Bad Vibrations  

RE: Bad Vibrations

My first Core One (factory assembled) was returned because the noise from the vibrations was just too loud (as mentioned here).
I now have my second Core One (also factory assembled) and it's like having a completely different printer.
No annoying loud vibrations, it's not completely silent, but it's what I originally expected from the start.
So that shows me that the Core ONE can be quiet and the vibrations can be avoided even without tinkering or the need for adjusting the speeds

RE: Bad Vibrations

Good to know! I can't wait to build my CORE One kit as I also returned my assembled CORE One a month ago because of noises and VFA.

RE: Bad Vibrations

Posted by: @rolf-7

My first Core One (factory assembled) was returned because the noise from the vibrations was just too loud (as mentioned here).
I now have my second Core One (also factory assembled) and it's like having a completely different printer.
No annoying loud vibrations, it's not completely silent, but it's what I originally expected from the start.
So that shows me that the Core ONE can be quiet and the vibrations can be avoided even without tinkering or the need for adjusting the speeds

That’s great!  I’m glad they were helpful.  Do you have a sense of why it’s different?  Tighter acrylic panels or fasteners?  Reduced motor or fan noise?  Different feet?  I’m about to start building and am looking for any clues that might help me avoid ending up with a noisemaker.

RE: Bad Vibrations

I found the door can vibrate at higher chamber temperatures as it expands more.

RE: Bad Vibrations

I found a bad sound on mine too, not likle your's, but annoying on some moves, the inside of this hole rubs against the PTFE connector and it make an annoying squeaz. I put a little of grease on the walls and it desappear.

RE:

I can show some of my issues:

Its none of the panels.

I also found the back guide for the z-screw can rattle.

RE: Bad Vibrations

I am having similar issues on my factory core one.

printer is very loud and has vibrations on the y-axis.

also had several restarts- it beeps 8 times, reboots and resumes. Today it showed a  “puppy error” #31522 error code. Had to do a hard reset and was not able to resume the print.

anyone else having this combination of problems like noise, vibrations, restarts and/or had the puppy error?

thanks!

RE: Bad Vibrations

I just saw this on Redit: Link 

Does anyone still have this issue?

I wonder how many printers suffer from this.

RE: Bad Vibrations

Fortunately, my printer doesn't make such noises. Doesn't sound so good.

RE: Bad Vibrations

[q]I just saw this on Redit: Link

Does anyone still have this issue?

I wonder how many printers suffer from this.[/q]

I noted that after a few days of printing, my Core One started making sounds similar to that... and I adjusted the belt using the phone app's micro for Hz. Adjusted the belt to 90Hz and the sound sent away. It would likely have gone away at 85Hz, but I saw a maker video where the guy was evaluating the Core One (sent to him for free from Prusa) where he had an issue with print quality; Prusa had recommended he tighten the belt to ~100Hz and it solved that issue completely. I opted for an in between setting as to not wear out the belt(s) or cause other wear and tear.

RE: Bad Vibrations

Not quite that bad but I still have similar issues. Sent a video to Prusa support and currently waiting for a reply.

RE: Bad Vibrations

Same 😕😔IMG_5685

RE: Bad Vibrations

Posted by: @dave-31

Same 😕😔IMG_5685

Your video doesn't have sound, could you upload it again with sound please?

RE: Bad Vibrations

Vibration:

I noted that printer stability was a challenge with the OEM provided rubber strips on the Core One.

I printed some feet with some TPU pads I found on Printables. Since they are installed on the four corners of the printer stability is significantly increased and general print vibration and rock is reduced.

I’ve also noticed that placing the printer on a 13mm, 460mm x 460mm steel plate adds to this stability. (Ignore the Sako green, it was all I had laying around in the shop…)

Lastly, I found that the belts had to be re-adjusted relatively soon after initially placing the printer in service. Additionally, I noticed that 90Hz was a little better than the 85Hz Prusa indicates for the core one belt adjustment.

RE:

Hi,
I just build the kit and I am having the same problem. The printer is making a horrible noise when printing in y or in x direction only.
Belt tension is at 84/85 Hz on both side according to the app. and the x-axis has no play on either side when pushed to the foremost position. So everything should be square.

Since I got an accelerometer I decided to try the phase steeping calibration that is part of firmware 6.3.3. This feature is still in beta and can only be triggered by G-CODE Command M1977 (also see https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4461).

I ran it a couple of times sadly it did not fix the resonance issue (the last calibration I did gave me correction of 91% on X and 84% on Y and reduced the noise slightly but sadly not to a manageable level. (Keep in my mind. This is not officially released yet, so it could still be not working fully)

However setting perimeter speed to 90 mm/s from 80 mm/s did reduce the resonance by quiet a bit and the noise level is okay now, but it still sounds bad.

Has anyone solved this problem on their printers in the meantime?

I will talk to support over the next few days and see if they have more to say.

RE: Bad Vibrations

Hi,

I had similar noise in my CoreOne, kit version. It was very loud, and indeed, changing the printing speed to 90% or 110% changed the pitch and volume of the noise, but it didn't remove it, and it was still very loud. I contacted support, and they said they would investigate and come back to me once they know more.

This troubled me so much that I had to look more closely myself to see what was causing the issue. I noticed that even when the printer is turned off, when I move the extruder back and forth and side to side, I can easily replicate the vibration. I noticed that the vibration is linked to the XY-carriage / smooth rods, which cause the entire linear rail to vibrate and, in turn, the whole printer to vibrate badly. If I lifted / twisted the linear rail and moved it, the noise was gone. I thought that the issue might be with the LM10LUU linear bearing orientation / tolerance issue.

So, this is what I did next:

I moved the linear rail as far forward as possible, to the same position you put it in when aligning the CoreXY structure. Then, I loosened the screws holding the LM10LUU linear bearing on both sides. I moved the linear rail back and forth a little, then back to the front position, and tightened the screws again. Now, when I moved the rail back and forth, I immediately noticed that much less force was needed to move it, and the vibration was almost completely gone!

That slightly altered the belt tensions by a few Hz. I did the tensioning again and tried to print something, and I was really happy to find out that it's now so much quieter!

I hope this helps you guys, and let me know what you think and if it did help you!

RE: Bad Vibrations

Same. Curious if folks that have talked to support have come up with any insights or solutions. I'm trying to figure out if anything is loose. I just completed the assembly of the MK4S to Core One conversion kit and was very careful to tighten everything properly. 

Here is the noise mine makes.

IMG_3896

RE: Bad Vibrations

I moved the linear rail as far forward as possible, to the same position you put it in when aligning the CoreXY structure. Then, I loosened the screws holding the LM10LUU linear bearing on both sides. I moved the linear rail back and forth a little, then back to the front position, and tightened the screws again. Now, when I moved the rail back and forth, I immediately noticed that much less force was needed to move it, and the vibration was almost completely gone!

That slightly altered the belt tensions by a few Hz. I did the tensioning again and tried to print something, and I was really happy to find out that it's now so much quieter!

I hope this helps you guys, and let me know what you think and if it did help you!

 

Thanks! This solution solved my problem with resonation and associated sound over the x-axis. In addition, I set the belt tension to 90Hz instead of 85Hz.

RE: Bad Vibrations

It helps me too 😍

RE: Bad Vibrations

my mk4s upgrade to core one have same noise as ypurs did you manage to fix it? so far i been with support 3xtimes and now I am waiting for email from some proffesional support