RE: VFA Artifacts on X+Y Straight Edges
I also need Prusa to release the printable parts because the pulleys are 1mm thicker and I need to modify the parts to match.
Which pulley did you buy? I'm also considering changing all the pulleys (even the smooth ones) and getting 1mm more for the belt to no grind the sledge is a nice thing!
This is the one I got. There's not 1mm more for the belt, the flanges are. 5mm thicker.
One thing to be aware of, even tho Prusa uses "GT2" belts, you might want to buy a genuine gates belt and replace it as well. The teeth might not line up exactly with the new pully grooves.
RE: VFA Artifacts on X+Y Straight Edges
One thing to be aware of, even tho Prusa uses "GT2" belts, you might want to buy a genuine gates belt and replace it as well. The teeth might not line up exactly with the new pully grooves.
Do you mean Prusa don't use genuine Gates belts but knock-offs?
Or is it because the belts might have deformed, even after brief usage, from running over the smooth idlers? If the latter, couldn't that be a reason for belt ripple in its own right -- deformed teeth running over the toothed pulleys on the motors?
RE:
Do you mean Prusa don't use genuine Gates belts but knock-offs?
Or is it because the belts might have deformed, even after brief usage, from running over the smooth idlers? If the latter, couldn't that be a reason for belt ripple in its own right -- deformed teeth running over the toothed pulleys on the motors?
I'm not sure that's possible. Only the idlers mounted to the x-axis linear rail have the teeth running on the smooth idler. I don't think the section of the belt that runs across those idlers ever makes it back to the motor pulley. I've also done a test print over the majority of the bed and the amplitude/frequency of the VFAs do not change based on position on the bed.
RE: VFA Artifacts on X+Y Straight Edges
I'm sorry but as much I love Prusa, for now my X1C gives better prints and is more silent than my CORE One.
Im interested in this statement. The X1C was known to be a loud machine - you're suggesting te Core One is even louder???
--> MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide - BambuLab A1 Combo <--
RE: VFA Artifacts on X+Y Straight Edges
So I haven't even placed an order for a Core One yet.......but the reported loud noise and these VFA's are certainly putting me off. May stick to my MK4s for a little while longer!
--> MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide - BambuLab A1 Combo <--
RE: VFA Artifacts on X+Y Straight Edges
One thing to be aware of, even tho Prusa uses "GT2" belts, you might want to buy a genuine gates belt and replace it as well. The teeth might not line up exactly with the new pully grooves.
Do you mean Prusa don't use genuine Gates belts but knock-offs?
Or is it because the belts might have deformed, even after brief usage, from running over the smooth idlers? If the latter, couldn't that be a reason for belt ripple in its own right -- deformed teeth running over the toothed pulleys on the motors?
I just mean you should match them. If you buy genuine gates belts and pulleys you know for a fact that the belt teeth are designed to fit into the pulley grooves. AFAIK Prusa doesn’t list the manufacturer of their belts and it’s possible they have a different spec than what gates would produce in a “standard” run. I truly have no idea. I’m just saying that if you replace the idlers, might as well replace the belts so you know for certain they are matched.
RE: VFA Artifacts on X+Y Straight Edges
So I haven't even placed an order for a Core One yet.......but the reported loud noise and these VFA's are certainly putting me off. May stick to my MK4s for a little while longer!
Just watched another review last night and on the speed setting with the doors closed it was in the mid to low 40's db. That's not loud.
RE: VFA Artifacts on X+Y Straight Edges
Just watched another review last night and on the speed setting with the doors closed it was in the mid to low 40's db. That's not loud.
Unless I overlooked or forgot something, I have not seen any of the problems discussed here on the forum mentioned in any of the invited Youtube reviews: Noise at certain resonant frequencies, VFAs, Z drive getting stuck, nozzle wiping/probing problems, Y homing problems, incorrect belt tension, skewed gantries...
Are the reviewers just very lucky? Are the reviews done hastily, or do they deliberately gloss over problems because they feel obliged to Prusa? Or were the review units assembled with extra care, maybe using motors selected for extra-smooth operation etc.?
RE: VFA Artifacts on X+Y Straight Edges
Just watched another review last night and on the speed setting with the doors closed it was in the mid to low 40's db. That's not loud.
Unless I overlooked or forgot something, I have not seen any of the problems discussed here on the forum mentioned in any of the invited Youtube reviews: Noise at certain resonant frequencies, VFAs, Z drive getting stuck, nozzle wiping/probing problems, Y homing problems, incorrect belt tension, skewed gantries...
Are the reviewers just very lucky? Are the reviews done hastily, or do they deliberately gloss over problems because they feel obliged to Prusa? Or were the review units assembled with extra care, maybe using motors selected for extra-smooth operation etc.?
That's a question I have too. Maybe it's people like us who have issues that are unlucky? I mean, regarding the number of printer out of the wild, it seems to have a ridiculously low amount of complains...
RE: VFA Artifacts on X+Y Straight Edges
[...] regarding the number of printer out of the wild, it seems to have a ridiculously low amount of complains...
How would we know? We don't know the number of shipped units. Nor do we know the number of complaints which are handled directly by customer support without getting posted anywhere, nor the number of customers who consider things like a skewed gantry, wrong belt tension, or more pronounced VFAs tolerable or have not noticed them yet.
RE: VFA Artifacts on X+Y Straight Edges
In the video above from Aurora Tech, she talks a bit about the nozzle cleaning problem. The unit I got myself is for a review from a second wave I guess. As I am facing all these issues combined, I can tell that the units are not selected at all. Unless it was only for the first wave, who know.
About the noise, I can clearly state that the CORE One is way louder than the MK4S, but it's not really comparable because the CORE One also move faster and have to push more air because of the chamber, so more fan noises too.
Regarding the VFA, it is a problem that I can see mostly when printing shining black PETG. It is far less pronounced with other materials, but still visible. If I compare with the XL, I could almost say that it's similar. Unfortunately for now the MK4S gives me better results in terms of surface finish.
But I have to finish solving my others issues first before to get into the VFA check/comparison/solving...
RE: VFA Artifacts on X+Y Straight Edges
@Jürgen: you’re right, we can’t know, I was just talking about what I could see on this forum, on Reddit or other social media. And based on shipping queue I bet there are a lot of Printer in the wild.
@Kashidoki: I guess all the printer are not equal regarding noises and VFA, and I often had bad luck with mines 😅. Or I’m too picky…
RE:
Just watched another review last night and on the speed setting with the doors closed it was in the mid to low 40's db. That's not loud.
Unless I overlooked or forgot something, I have not seen any of the problems discussed here on the forum mentioned in any of the invited Youtube reviews: Noise at certain resonant frequencies, VFAs, Z drive getting stuck, nozzle wiping/probing problems, Y homing problems, incorrect belt tension, skewed gantries...
Are the reviewers just very lucky? Are the reviews done hastily, or do they deliberately gloss over problems because they feel obliged to Prusa? Or were the review units assembled with extra care, maybe using motors selected for extra-smooth operation etc.?
FWIW I am a reviewer and I mentioned the VFAs in my video. Im here mostly to see if there is some kind of resolution and then I can report on it 🙂 I did not cover noise in my review because I really don't have a setup to test it and tbh it sounded like all my other printers to me.
RE: VFA Artifacts on X+Y Straight Edges
FWIW I am a reviewer and I mentioned the VFAs in my video. Im here mostly to see if there is some kind of resolution and then I can report on it 🙂 I did not cover noise in my review because I really don't have a setup to test it and tbh it sounded like all my other printers to me.
Good on ya! But you bought the printer yourself, with your own money, from the first regular production batch, right? I had written about "invited reviews" since I am wondering whether those hand-picked reviewers received hand-picked printers from Prusa...
RE: VFA Artifacts on X+Y Straight Edges
ah I see! Good distinction. From my perspective, and I have no idea what Prusa is like, other companies have never stopped me from saying stuff. I've asked before and I usually get "say whatever you want, but try to reach out to us if you have a problem and we will try to work on it with you".
RE: VFA Artifacts on X+Y Straight Edges
ah I see! Good distinction. From my perspective, and I have no idea what Prusa is like, other companies have never stopped me from saying stuff. I've asked before and I usually get "say whatever you want, but try to reach out to us if you have a problem and we will try to work on it with you".
Actually I had not been aware that you are on Youtube. But now I just finished watching your Core One review and liked it a lot! Nicely balanced content (both in the selection and depth of topics and in the assessments you gave), and I very much like your style -- informal and relaxed, but very clear. Subscribed! 👍
RE: VFA Artifacts on X+Y Straight Edges
I don't know if anybody has been watching the reviews on the H2D. I'm definitely not a Bambu fan, but I think as far as print quality it looks like Prusa needs to step up their game. The prints look pretty flawless with no VFA'S.
Hopefully that will be the kick in the pants Prusa needs to address this.
I'll reiterate that my MK4 has almost zero VFA'S and amazing print quality. But my XL and it looks like many people's Core One do......
RE: VFA Artifacts on X+Y Straight Edges
I don't know if anybody has been watching the reviews on the H2D. I'm definitely not a Bambu fan, but I think as far as print quality it looks like Prusa needs to step up their game. The prints look pretty flawless with no VFA'S.
Hopefully that will be the kick in the pants Prusa needs to address this.
I agree. There are some aspects of printer design where Prusa won't be able to keep up with Bambu and needs to play a different game: Those dozens of sensors and cameras, those highly integrated mechanical functions in delicate molded parts... And I'm ok to trade this for solid, long-lived engineering with a bit less automation and more responsibility for the user.
But there is no excuse for not being able to move a print head smoothly. If Prusa falls behind in that core competency, they are doomed.
And move that print head quietly, by the way. Quoting from Clough42's review of the H2D: "The H2D motors are so quiet that I have at times looked into the printer to confirm they were still running. My X1 printers I can hear from outside the room. My Prusa XL, from the other side of the house."
RE: VFA Artifacts on X+Y Straight Edges
In both of the reviews I saw, there were some great prints and some flawed prints. So I wouldn't say it came out of the gate perfectly, despite the "15 sensors" and all of the other changes from the filament to the nozzle. I will certainly see more reviews, but VFAs are difficult to see on camera when you're not holding the model, and they aren't even on everyone's radar (not to mention not every review test prints large flat areas where they are even particularly visible).
I don't know if anybody has been watching the reviews on the H2D. I'm definitely not a Bambu fan, but I think as far as print quality it looks like Prusa needs to step up their game. The prints look pretty flawless with no VFA'S.
Hopefully that will be the kick in the pants Prusa needs to address this.
I'll reiterate that my MK4 has almost zero VFA'S and amazing print quality. But my XL and it looks like many people's Core One do......
