RE: Resonance at a certain speed
Mine does exactly the same.
1. Tried rescrewing linear rail.
2. Squared Gantry completely
3. Overtightened the Belts
4. Touched all the panels and motor (pressing reduced something but did not remove it)
5. Removed speed from structural profile (set to 100mm/sec) This just moved the resonance around when printing circles, so still loud.
The only thing I have not tried yet is using an accelerometer.
Support can't help me in any way as of yet. I am determined to get a working printer.
I will update you all as I try new things.
RE: Resonance at a certain speed
The only thing I have not tried yet is using an accelerometer.
Try it. For me, the 40/80 mm/s resonances are still there, but all other speeds got a lot better after running the hidden phase stepping calibration, so it's fine for me. The resonances pass, before everything really starts to resonate.
Sadly, there's no option like "if slow down needed due to too short layer time, use these specific speeds". The very short resonance during acceleration/deceleration or circular movements don't really bother me, but I had some prints, where the slow downs caused some constant 40/80 mm/s.
So I set the automatic slow down to just 1s and didn't see issues yet.
RE: Resonance at a certain speed
As an update
I installed and ran the accelerometer on my prebuilt today and noticed the following.
The benchy is much noticeably cleaner, with a lot less ghosting next to the round openings.
There visibly seems to be less pronounced VFA (but still there on glossy black)
Interestingly, I now get the same resonance I had before on slower, rectangular prints.
Before running input shaping, it was on larger, circular prints.
I really do believe it must be something which has been changed from the MK4S system when the motion system was changed to corexy, as the toolheads are incredibly similar, but I have not experienced this level of resonance on the MK4S.
As on the comment above, I also tried pressing various panels, sheets etc but noticed no difference to the presence of the resonance.
RE:
Several people reported that the noise the had on their printer came from one the motors.
On Facebook "Prusa CORE One users" group, I posted a poll regarding resonance noise, and someone told me that after replacing his Y motor the noise went away.
RE: Resonance at a certain speed
Several people reported that the noise the had on their printer came from one the motors.
On Facebook "Prusa CORE One users" group, I posted a poll regarding resonance noise, and someone told me that after replacing his Y motor the noise went away.
That could be the case. I wouldn’t know though as support hasn’t replied to my email with clips of it occurring.
Is there a recommended way to get in touch with support? I sent it to the email on their contact page.
alternatively, does anyone know the exact motor for the x and y axis? I wouldn’t mind trying to replace them myself if I can source them, to see if it helps.
RE: Resonance at a certain speed
I just ordered it, as it is free with the voucher that prusa gifted me for the delay. Just have to pay for shipping.
I will also get some news from support in a couple of days via email. But I doubt they will send me new motors just to test it out.
It more likely seems like they want my belts to have 85/85 Hz (I have 85/87) and say that it is user error then and close this issue with that, but I am really trying to be patient here.
Not one person in support has mentioned phase stepping yet so I am unsure if it will fix the issue.
RE: Resonance at a certain speed
I see more and more posts on Reddit about those annoying resonance noises. I really hope there will be a fix soon, it's really bothering me as my Printer sits close to me on my office, and it's the only printer that makes those sound among every I have.
RE: Resonance at a certain speed
A dev has previously responded on the GitHub linked here 4 months back saying they regret addressing the issue, and that phase stepping is only “experimental code”
I may be reading into the lines, but it reads as if they may not actually be planning to introduce phase stepping to quieten it.
I see more and more posts on Reddit about those annoying resonance noises. I really hope there will be a fix soon, it's really bothering me as my Printer sits close to me on my office, and it's the only printer that makes those sound among every I have.
RE: Resonance at a certain speed
That could be the case. I wouldn’t know though as support hasn’t replied to my email with clips of it occurring.
Is there a recommended way to get in touch with support? I sent it to the email on their contact page.
alternatively, does anyone know the exact motor for the x and y axis? I wouldn’t mind trying to replace them myself if I can source them, to see if it helps.
You can chat with them on Prusa website. Sometimes the chat is hidden if you have modules that hide cookies or ads.
Just by another on their shop, it seems that all motors are not bad. At least the guys who changed one of his motor has changed it to another official one.
RE: Resonance at a certain speed
A dev has previously responded on the GitHub linked here 4 months back saying they regret addressing the issue, and that phase stepping is only “experimental code”
I may be reading into the lines, but it reads as if they may not actually be planning to introduce phase stepping to quieten it.
I see more and more posts on Reddit about those annoying resonance noises. I really hope there will be a fix soon, it's really bothering me as my Printer sits close to me on my office, and it's the only printer that makes those sound among every I have.
He said he regretted giving the « beta » gcode because he has hope that people would use it to help him, but instead many went on Reddit to post that it doesn’t work etc.
I don’t understand that he doesn’t work on it anymore, just that the behavior of community disappointed him.
RE: Resonance at a certain speed
Aaah, that makes sense. I have a bit of a language barrier which may be why I have read it incorrectly.
Thank you for the info on buying the spare motors. I will add some to my next order.
A dev has previously responded on the GitHub linked here 4 months back saying they regret addressing the issue, and that phase stepping is only “experimental code”
I may be reading into the lines, but it reads as if they may not actually be planning to introduce phase stepping to quieten it.
I see more and more posts on Reddit about those annoying resonance noises. I really hope there will be a fix soon, it's really bothering me as my Printer sits close to me on my office, and it's the only printer that makes those sound among every I have.
He said he regretted giving the « beta » gcode because he has hope that people would use it to help him, but instead many went on Reddit to post that it doesn’t work etc.
I don’t understand that he doesn’t work on it anymore, just that the behavior of community disappointed him.
RE: Resonance at a certain speed
Aaah, that makes sense. I have a bit of a language barrier which may be why I have read it incorrectly.
Thank you for the info on buying the spare motors. I will add some to my next order.
Just in case: the fix consisting of changing a motor may or may not be effective on your printer. Someone did it and it seemed to work, but that may not be the case for everyone. 😉
RE:
I've performed the operation for squaring the gantry because I often had issues with homing.
I checked all the screws on the gantry, they seem fine.
Then I tightened my belts to both 88Hz.
Now, I get this noise on X-travels...
See video attached (or https://streamable.com/x8htfm )
RE: Resonance at a certain speed
After 2 hours with support, we tried:
- Setting belt tension to 100Hz, 80Hz and 85Hz
- Unscrewing and re-tightening the screws that hold the linear rail
It didn't change anything, so support is sending me a lubrication kit for the linear rail.
We will see !
RE: Resonance at a certain speed
My guess: before squaring the gantry, there was some tension in the system, which dampened the resonance at 80 mm/s.
Now that the gantry is "better", it happily vibrates at its resonance frequency.
Did you try to change the speeds in the structural profile? And if you don't have the acceleration kit: ask the support to send it with the lubrication kit. Input Shaping + Phase Stepping calibration helped me a lot for any speed, except 40 & 80 mm/s, making the printer a lot quieter overall.
RE: Resonance at a certain speed
I would just recommend not using the structural profile altogether and switching to speed.
Changing the speeds works for mostly straight objects. But if we only change them a little we will hit the resonance at the curves making rounded objects sound grating at specific points in the movement. That's at least my experience. But I would really love to be able to print in the structural profile as well 🙁
RE: Resonance at a certain speed
I would just recommend not using the structural profile altogether and switching to speed.
Changing the speeds works for mostly straight objects. But if we only change them a little we will hit the resonance at the curves making rounded objects sound grating at specific points in the movement. That's at least my experience. But I would really love to be able to print in the structural profile as well 🙁
It's exactly my thoughts, changing speed only move the issue, it doesn't fix it. It's absolutely not universal.
I really hope phase stepping calibration will help when it will be ready.
RE: Resonance at a certain speed
Someone on Reddit claims the resonance issue is fixed with a new X motor:
RE: Resonance at a certain speed
A Core One user with vibrations at 80 mm was instructed by support to loosen the six screws on the linear rail and then tighten them again until there was slight resistance.
Then tighten the screws another 45⁰, starting with the outer ones.
After that, his problem was solved.
I can't test it because I don't have the problem.
RE: Resonance at a certain speed
well I have Kit same sound in some speeds not in all the speeds