Inconsistent extrusion
Hello,
I am also very interested in the XL. I had sold my MK3s+ some time ago because the print quality was too poor for me, due to the inconsistent extrusion in the walls. However, a printout of an XL has now appeared in a video, in which exactly this poor print quality of the outer walls could be seen again. Can anyone from Prusa confirm to me that this is only a problem with the pre-production models, or do I have to live with the inconsistent extrusion problem with the XL as well?
Here is the link to the video:
Regards Frank
RE: Inconsistent extrusion
Can no one say anything about this? For me it would be a ko criteria....
RE: Inconsistent extrusion
I don't think anyone from Prusa routinely checks these threads.
For what it's worth, I didn't have that kind of issue with the MK3s I used (didn't own it but used one for a few months).
Since the printer isn't even out yet, you'll likely just have to be patient and wait on more direct information as well as reviews from reputable folks.
Can no one say anything about this? For me it would be a ko criteria....
RE: Inconsistent extrusion
Of course I could wait until the Prusa XL is delivered. But since there are certainly already some test users, it would be helpful to see some printouts, so that you can get an idea of the print quality. The printout on the picture in the attachment seems to have the same issues as my printouts with the MK3s+...
Don't entertain any unrealistic expectations. The Mk3 and Mini are already producing close to the best quality that can be expected from FDM printing, the XL will not noticeably improve the cosmetic finish, thats not the design intention.
If you want better looking finishes you'll have to do it the hard way with machining, sandpaper, filler and paint.
Cheerio,
RE: Inconsistent extrusion
Sorry, but this statement makes little sense, since my Ultimaker Original plus can create better walls.
But if it really should be so, then the XL is the wrong device for me.
RE: Inconsistent extrusion
Can you show some pictures in combination with the printed material (PLA, PETG, ...) - would be really interesting!
Best regards, Clemens
Mini, i3 MK2.5S, i3 MK4, CClone (Eigenbau)
RE: Inconsistent extrusion
I finally watched the video linked to in the original post. All it is is a rehash of the Prusa XL videos, with some lame jokes added for good measure. I suspect the XL print profiles haven't been optimized yet as they're still working on the machine itself. So I wouldn't take what I'm seeing in the video as the final word. But the XL isn't out in the wild yet, so pretty much everything is just pure speculation at this point. I also think that a well-tuned Mk3S should produce somewhat better results than what is shown in the picture of a cube a few posts above.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: Inconsistent extrusion
I finally watched the video linked to in the original post. All it is is a rehash of the Prusa XL videos, with some lame jokes added for good measure. I suspect the XL print profiles haven't been optimized yet as they're still working on the machine itself. So I wouldn't take what I'm seeing in the video as the final word. But the XL isn't out in the wild yet, so pretty much everything is just pure speculation at this point. I also think that a well-tuned Mk3S should produce somewhat better results than what is shown in the picture of a cube a few posts above.
Agree on all points, especially about the MK3s not having this issue. As I said before, on an MK3s that I borrowed for ~3 months (and probably a few dozen prints in that time), I did not have that issue. Well tuned and good filament.
Agreed @fuchsr, that sample looks like damp filament and a poor first layer. The XL will easily beat that Im sure.
Cheerio,
RE: Inconsistent extrusion
I don't think the video is particularly good either, I was just irritated by the printout. And that there is not and has not been this issue with the MK3s(+) is definitely wrong. I have also been working for some time with 3D printing and have tried everything possible, together with some members of this forum, but the problem remained. By the way, this problem does not only occur with the Prusa, but with some other manufacturers as well. The error has been evaluated here: https://github.com/prusa3d/Prusa-Firmware/issues/602
But if everyone here wants to talk it up, fine by me. By the way, I also hope that this is a pre-production problem, because I really like the XL with its possibilities.
RE: Inconsistent extrusion
I think this layer lines are effect from inconsistence filament diameter. I have never seen any filament that says 0,00mm tolerance... there must be some inconsistence in diameter, and every roll of filament have different tolerance too... CMIIW
The commonest (but not exclusive) cause of uneven extrusion is the varying of extruder pressure caused by steam boiling off of damp filament.
Usually worst with PVA, then nylons, then flex, PETG, wood/corkfill, PLA and almost none with ABS.
Cheerio,
RE: Inconsistent extrusion
In my opinion it has also to do with the layer height that you use. I printed this egg with a 0,15 mm layer height and so you can see there is nearly the inconsistent extrusion that you see in the samples show in this topic before.
I think that the samples you seen from the XL printer are printed with 0,2 mm layer height or higher.
How bigger the layer height the more the layer is visible.
RE: Inconsistent extrusion
Can no one say anything about this? For me it would be a ko criteria....
Oh no, same.
I'm a new MK3S+ user and have just discovered this whole issue around inconsistent extrusion / bumpy flat surfaces. I'm still deciding if I persist with the machine or return it, but was pinning hopes on the nextruder of XL having sorted the extrusion flaw in the MK3S+. Would be very disappointing if this is still an issue, as it seemed to not exist on the mini.
RE: Inconsistent extrusion
Is there any new experience in this regard? Has anyone ever printed a simple cube with the XL and could post the photo here?