RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Experience has shown that it takes a year for a new device, especially one with new kinematics, to get the firmware working properly.I think it's understandable if fewer functions are activated at the beginning to ensure that operation is as trouble-free as possible.Once the base is running stably, you can gradually add functions.
It is understandable that a housing tends to make more noise. These are simply resonances that occur in any moving system.
The large steel parts are of course loudspeakers and in my opinion should be insulated if you are aiming for low volumes. This could be done with bitumen foil, as used for loudspeakers in car doors, for example.
The higher weight increases the energy required to vibrate and dampens the resonances.
It could also be possible that the temperature is kept better inside. The problem could be that there is little space between the print plate and the housing.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Experience has shown that it takes a year for a new device, especially one with new kinematics, to get the firmware working properly.I think it's understandable if fewer functions are activated at the beginning to ensure that operation is as trouble-free as possible.Once the base is running stably, you can gradually add functions.
In this particular case I disagree. This is not about "adding functions", it is about mitigating a known hardware issue -- namely nasty resonances created by some motors. And mitigating it by a solution that is already known (and known to be necessary) from the XL.
This should have been implemented in the Core One right from the started. And now that Prusa decided to ship without it, I certainly won't give them a year. The return window for my printer will close 60 days after receipt. If should still be noisy when that deadline approaches, I don't think I will keep it.
The large steel parts are of course loudspeakers and in my opinion should be insulated if you are aiming for low volumes. This could be done with bitumen foil, as used for loudspeakers in car doors, for example.
The higher weight increases the energy required to vibrate and dampens the resonances.
It could also be possible that the temperature is kept better inside. The problem could be that there is little space between the print plate and the housing.
You may have seen that dampening is exactly what we discussed in the recent posts? Decoupling and dampening the plates around the edges, with foam tape between the frame and plates, should be possible within the given space constraints. @tomtim's preliminary implementation suggests that it will help.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Yes, well, the adhesive tapes help a bit, but since there are still various vibrations at the edges of the component in the printing unit, I have now set the speed to 70% and with that you can print normally again. Of course, printing takes longer.
There are also some small printing errors that I blame on the printer; the MK4s did not make these errors.
Let's wait and see. The Core One has been printing relatively quietly since this morning and doesn't bother anyone like the MK4s did.
Another HD camera for 10 euros from China arrived. The case is 1x1 cm. I'll build a case for it later and install the 120-degree field of view first.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
You can easily add insulation or decoupling to the kit. That will help no matter how and when Prusa reacts.
A Bambulab is hellishly loud and nobody cares.
The tests I have seen so far, with measurements, the Core One is not a loud printer. If you're interested, you can tune the Core One into an even quieter printer.
Yes, I have registered the decoupling, but I think that large-area insulation brings more and also has the side effect of isolation. I think decoupling was also a reason to use rivets.
But first I will build my Core One kit, when it arrives, with a lot of love and then judge whether the effort is necessary at all. That's where I find the advantage of a kit. You have everything in your own hands and have all the time in the world to make the assembly perfect.The worker in the factory certainly doesn't have that.
The processes are not as perfected at the beginning. With all new products, the first batches simply have a higher risk.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Just to add another case: mine too (batch #2) makes surprising sounds. I have been "singing along" printing some models precisely because some of the frequencies of the noises are like "notes" but what really got me by surprise was a metal like "resonance" sound, not always and not with every print.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I think what you describs is same issue we're talking about here: https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/bad-vibrations/paged/4/#post-740412
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
The XL was very loud initially as well. Many blamed the metal panels and there were all kinds of mods from people to make it quieter. Prusa finally released the phase stepping and all of the noise complaints went away. It reduced the noise by 90% easy.
Given that Prusa already had this experience, what were they thinking when they released the Core One without the phase stepping calibration?!
I can't speak for Prusa, but if I had to suspect I'd guess that since they are using the same motors and drivers as the MK4 they didn't think it was needed. The MK4 is extremely quiet imo. I'd guess that taking away the heavy cast frame that the MK4 had, and attaching it to the much less dense sheet metal frame that's larger, it changed the harmonics of the system therefore making the motor tuning much more critical.
I'm thinking not every printer is having this issue as I haven't seen a single review yet on the machine complaining about the noise. This would again seem to be pointing to motor tuning, but again that's a guess. The fact that they are working on it gives me hope. My machine should be shipping in the next few weeks so I should be able to add more to the conversation. I ordered within an hour of release, but added the Filtration unit and camera so the shipment date was moved to March, which I'll assume it's the end of March.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Hi,
I'm not 100% sure what else, but removing the side panels and putting dampening material in-between you did. How's the belt-tension? Do you have any putty or something else, that you can try to put on stuff to dampen various parts of the printer? Is it probably a lubrication issue, or is the pretension on the linear rails to high or to low?
Just adding some guesses how it would be possible to figure out what's the reason for the vibrations.
On my old printer I could get rid of some vibrations editing the speed ramp-up. Don't know if it is possible with the prusa printers.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
I have now refitted all the walls with the adhesive tape and it is now printing at 70% speed. Just about ok...
As I said, it starts buzzing with the walls, so Prusa will probably have to fix that with software.
So let's wait and see... hopefully there will be a software update soon. I think that's the most important thing for now...
When I start my printer now, I always have to push the print head backwards because otherwise it won't start. Allegedly collision etc... after 5 minutes of banging in the corner, reset once, push the head backwards, restart the print and it calibrates immediately.
RE: Prusa Core One not usable inhouse... Sorry, but the sound was to intensiv
Would be interested to know noise-wise how the Core One compares to Bambu machines.
I’ve had a P1S for just over a year, and have always felt that it was fairly loud when in operation. In comparison, a friends MK4S always seemed much quieter.