RE: VFA Artifacts on X+Y Straight Edges
Happy wife, happy life.
When in doubt, a less shaky printer is not worth it.
Do you have foam under the stone?
I would recommend one with approx. 80KG/m³.
RE: VFA Artifacts on X+Y Straight Edges
I would suggest a brief test where you place the printer directly on the floor, in a room or hallway without the thick carpet. Does this give you a significant improvement in VFAs or other aspects of print quality, compared to your current paver/desk/carpet arrangement? Otherwise, no need to open that can of worms...
RE: VFA Artifacts on X+Y Straight Edges
My Core One is on a paver on a desk that is ok stability wise, but the carpet in that room is very thick, meaning both my desks have a fair bit of wobble.
My two options to make it more stable is to somehow mount something directly to a wall, or cut some holes in the carpet...the other half isn't thrilled with either of my 'solutions' 😂
Actually neither of those solutions will work. Even if you put Core One directly on the floor, it will still vibrate and shake a lot. It's much better than some wobbly table or shelf, and apparently it may help with issues like XY homing failures, but rigid base is not the ideal. You need to somehow dampen the vibrations of the printer. A great cheap solution is concrete paver with some foam mat (like for camping or yoga) underneath. Stefan from CNC kitchen made a great video about it.
RE: VFA Artifacts on X+Y Straight Edges
I would suggest a brief test where you place the printer directly on the floor, in a room or hallway without the thick carpet. Does this give you a significant improvement in VFAs or other aspects of print quality, compared to your current paver/desk/carpet arrangement? Otherwise, no need to open that can of worms...
Ugh...that means lugging it down 2 flights of stairs 😂
You're right of course, I might try that at the weekend.
TBH as 99% of what my printer is used for is matte filaments I'm keeping an eye on this issue through general interest, rather than being directly affected by it.
RE: VFA Artifacts on X+Y Straight Edges
They will send me new belts.
RE: VFA Artifacts on X+Y Straight Edges
They will send me new belts.
I wish you the best of luck, but remain skeptical. When you receive and install the new belts, please let us know whether they take care of the VFAs for you!
RE: VFA Artifacts on X+Y Straight Edges
Even if you put Core One directly on the floor, it will still vibrate and shake a lot. It's much better than some wobbly table or shelf, and apparently it may help with issues like XY homing failures, but rigid base is not the ideal. You need to somehow dampen the vibrations of the printer.
I can't confirm that for the Core One. Mine sits on a very rigid desk, it does not exhibit acoustic resonances and has always homed reliably. It does exhibit VFAs though, as apparently all other units do.
RE: VFA Artifacts on X+Y Straight Edges
They will send me new belts.
I wish you the best of luck, but remain skeptical. When you receive and install the new belts, please let us know whether they take care of the VFAs for you!
Thanks, I have the same doubts, but it doesnt hurt to try.
I will probably return it if it doesn't work, and then order a new one later.
RE:
Even if you put Core One directly on the floor, it will still vibrate and shake a lot. It's much better than some wobbly table or shelf, and apparently it may help with issues like XY homing failures, but rigid base is not the ideal. You need to somehow dampen the vibrations of the printer.
I can't confirm that for the Core One. Mine sits on a very rigid desk, it does not exhibit acoustic resonances and has always homed reliably. It does exhibit VFAs though, as apparently all other units do.
I am leaning towards that the printer is happier if it is allowed to move rather than sit on a very rigid surface. I tried both, first on a really heavy workshop desk firm on its original rubber feet, it wobbled and everything vibrated at some speeds. It now sits on a wall mounted shelf 1/10 of the weight but on a dampening stack built from 4 60x60 cm floor tiles with dampening material in between and while the printer moves a lot more but the shelf barely vibrates. It does nothing for VFAs though they are still there.
/Anders
RE: VFA Artifacts on X+Y Straight Edges
Today, I was testing the VFA test for Core One on PLA+ and my assembled kit and, like others, found 2 mm spaced small ripples, although not as prominent as on some of the examples here. The higher the speed, the less noticeable it was. But what was interesting is that they depend on the direction of the extruder during the printing. Most prominent they were on Y axis moving to the back of the printer (but essentially not existent when moving towards the door), and then on X axis moving to the left (but not to the right). On the 60 and 30 degrees part of the model, they were presented in both directions (sides of the plate).
This is strange, as I hope the motors are controlled in the same way in both directions. Maybe the way how is belt pulled is different and this causes the ripples?
Also, during pure Y axis movement, the belt does not move on the pulleys where it is touching by teeth. So, changing these pulleys won't help.
Anyone else experiencing the same on their prints?
RE: VFA Artifacts on X+Y Straight Edges
this threas is like a 100% carbon copy of the issues of the P1P and P1s series. And people searching for the exact same solution. The story repeats itself.
I sold the p1p because this issue was never sold and the machine has horrible VFA. Now, with my Core One back at Prusa, I am watching this closely and it will also determine if it is worth reliving this nightmare again.
All in all, the unfinished firmware, the out of square gantry plus all of the other issues already listed in other threads... I continue to wonder why people are so light with Prusa and not holding the accountable.
People are willing to put a .10 cent wire in the gantry to get it square.... It blows my mind.
This would never be tolerated in any other brand, nonetheless, Prusa owners want to be the beta testers to all these things, at a premium price.
RE: VFA Artifacts on X+Y Straight Edges
Same here, wrote them today. I was that dumb to believe they are going to get phase stepping working before I can't return it anymore... Gonna let them repair it 3 times before I use my right to return due to the seller not being able to repair it...
this threas is like a 100% carbon copy of the issues of the P1P and P1s series. And people searching for the exact same solution. The story repeats itself.
I sold the p1p because this issue was never sold and the machine has horrible VFA. Now, with my Core One back at Prusa, I am watching this closely and it will also determine if it is worth reliving this nightmare again.
All in all, the unfinished firmware, the out of square gantry plus all of the other issues already listed in other threads... I continue to wonder why people are so light with Prusa and not holding the accountable.
People are willing to put a .10 cent wire in the gantry to get it square.... It blows my mind.
This would never be tolerated in any other brand, nonetheless, Prusa owners want to be the beta testers to all these things, at a premium price.
RE: VFA Artifacts on X+Y Straight Edges
I continue to wonder why people are so light with Prusa and not holding the accountable.
Because after several printers of this brand I have the confidence that the small errors will be eliminated.
The print quality will get better and better and new functions will be added. If there are hardware improvements, I have the option of upgrading at a reasonable price if I want to.
Prusa has earned this trust and I don't expect to be disappointed this time either.
I am also satisfied with the print quality. Of course, there's always room for improvement....
There is an official solution for aligning the portal. I built my Core One as a kit, so I paid particular attention to this.
Of course, you can argue that it shouldn't be necessary on a finished device in this price range. But I would rather have a printer that runs after 10 minutes.
RE: VFA Artifacts on X+Y Straight Edges
Kinda understand you, but I doubt that Prusa does not read and know about VFAs being a well known problem in the 3D printing world. So something like that should not be the major issue of a new flagship printer. I'm not against Prusa despite the Core One being my first one, so don't call me a hater, but since I've not seen a single Core One (kit or assembled) which does NOT have the VFAs and therefore the prototypes were having these too, it's kinda a bad light why the printer was released already without the problem being eliminated.
I continue to wonder why people are so light with Prusa and not holding the accountable.
Because after several printers of this brand I have the confidence that the small errors will be eliminated.
The print quality will get better and better and new functions will be added. If there are hardware improvements, I have the option of upgrading at a reasonable price if I want to.
Prusa has earned this trust and I don't expect to be disappointed this time either.
I am also satisfied with the print quality. Of course, there's always room for improvement....
There is an official solution for aligning the portal. I built my Core One as a kit, so I paid particular attention to this.
Of course, you can argue that it shouldn't be necessary on a finished device in this price range. But I would rather have a printer that runs after 10 minutes.
RE: VFA Artifacts on X+Y Straight Edges
When I look around the forums of other brands, it seems to me that no one is unaffected by Vfa, especially with Corexy.
This is a widespread problem, especially with the Bambulab, and can be very pronounced.
Bambulab's only solution is to clean the rods and print over 150mm.
In my opinion, nobody has a real solution for the artifacts from the belt.
It is also different for printers of the same series.
It also depends on the filament used and the model.
It is present on my Core One, sometimes more, sometimes less. But mostly within an acceptable range.
I printed this helicopter test print with red filament Unger and there is no Vfa at all.
I would still like the Prusa Slicer to have the function that the outer walls are not slowed down.
That would make it easier to find the optimal area.
RE: VFA Artifacts on X+Y Straight Edges
I agree that all other printers have that too. The difference is that printing way faster solves it most of the times. On my V-Core, the VFAs were visible from 30-200mm/s. After I bumped the outer perimeter speed up to 220mm/s, the prints look like casted. Yes, it's a DIY printer, yes, I invested some time tuning it, but isn't that exactly what I expect to be already done by the manufacturer when ordering a preassembled printer?
I tried the VFA test, I tried the different print profiles and the VFAs just shifted but stayed as pronounced as in the beginning.
RE: VFA Artifacts on X+Y Straight Edges
H2D has no vfa.
RE: VFA Artifacts on X+Y Straight Edges
H2D has no vfa.
When I look at the test from Aurora tech, I think that the trash can print Vfa was visible.
RE: VFA Artifacts on X+Y Straight Edges
Yeah, because they invested some R&E time since the X1C and P1S messed up big time in the beginning
H2D has no vfa.
RE: VFA Artifacts on X+Y Straight Edges
H2D has no vfa.
All Core XY belt driven printers has VFAs. H2D has them pretty much the same as Core One: https://forum.bambulab.com/t/request-vfa-test/157362/14