CORE One resonance noise issue
Hi!
As I noticed more and more users reporting annoying resonance noises at 80mm/s (from straight axis movement, easily noticeable when printing inner walls from boxes at standard structural profile), I would like to know if it really affects most of the printers.
Please answer only if you actually tested a « cubical » print with 0.2 structural profile!
Thanks a lot, it would be amazing to make Prusa do something about this really annoying issue.
You will not get a meaningful answer.
Most users never visit a forum unless they have some issue, most forum visitors therefore have a problem ... however ... there are tens of thousands of printers in users' hands so although a large proportion of the people likely to reply here will have problems - count them, if you get under 10K replies from users with the issue then you can assume that most either don't have the problem or at least haven't noticed it.
Cheerio,
RE: CORE One resonance noise issue
You’re absolutely right, that what I though during the night, it can’t be representative on a forum, Reddit or any Prusa page…!
RE: CORE One resonance noise issue
Well, as mentioned in the other thread, the speeds for the structural profile are identical to the MK4s profile. Apparently Prusa either didn't really test it or thought the whole printer resonating would be fun listening to.
Btw, try to set perimeters to 40 mm/s and it will sound like it wants to resonate itself apart.
I'm yet to record the noise, find out the troublesome frequency, make an audio track with a sine wave on that frequency, play it back with my mini-bassshakers and hold them against each part of the Core One.
As of now, it seems that at 40 & 80 mm/s, the belt teeth are triggering the gantry to resonate, which then vibrates the whole printer, sounding like the Y-bearings would be sticky or the belts getting pinched.
RE: CORE One resonance noise issue
Well, as mentioned in the other thread, the speeds for the structural profile are identical to the MK4s profile. Apparently Prusa either didn't really test it or thought the whole printer resonating would be fun listening to.
Btw, try to set perimeters to 40 mm/s and it will sound like it wants to resonate itself apart.
I'm yet to record the noise, find out the troublesome frequency, make an audio track with a sine wave on that frequency, play it back with my mini-bassshakers and hold them against each part of the Core One.
As of now, it seems that at 40 & 80 mm/s, the belt teeth are triggering the gantry to resonate, which then vibrates the whole printer, sounding like the Y-bearings would be sticky or the belts getting pinched.
I saw 2 posts on internet saying that it cames from one of the motor. After replacing the faulty one the noise was gone.
Yes, 40 and 80mm/s are the worst.
I my kit show resonance when I get it I will try to replace the faulty motor(s).
RE:
For what it's worth, I just tried printing a rectangular box (oriented at 90°) on my stock Core One. PLA 0.2 mm structural profile; printer belts tuned to 84 Hz.
With the standard settings I did not notice any resonance. When I set the outer perimeter speed to 40 mm/s (reduced from the standard 45 mm/s), the motion does become a bit louder and sounds somewhat harsh from harmonics. But I would not characterize it as "rattling", and it is not at a level where I would be concerned that something comes apart, or even where it would annoy me when working in the same room.
Nevertheless, there is a resonance around 40 mm/s; that might be "universal by design" in the Core One? In my printer it is narrow enough to fully disappear at 45 mm/s, but not sufficiently "high Q" to be a concern for me.
Edit: I have not tried phase stepping calibration so far.
RE: CORE One resonance noise issue
For what is worth, I'm seeing the exact same. Finished assembling the upgrade today from the MK4S and in the first print this caught my attention. Resonance at 40-45 mm/s. I haven't done much more testing to see what can be the source or a potential solution. I've seen some posts on this so hopefully Prusa team are aware.