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Sherri
(@sherri)
Eminent Member
Artifact help

I have an artifact that has me stumped.  I just realized that this is happening on all my prints and suspect that it is over-extrusion.  I'd really like to have a better understanding of the "why" rather than the "fix."  I don't have any good pics yet, but I think it's easy enough to describe.

I'm currently printing the z-axis parts for my old Mk2 in petg and the artifact is occurring there.   Parts being printed look good, generally and the 20mm cube is within 1% accurate.  Basically, any vertical wall will develop an overhang of 0.5mm anywhere the layer footprint transitions from wide to a narrow wall.  Sorta like banding or z-shift but directly related to this transition.  Interestingly, I just noticed that my Prusa factory z-motor mounts ALSO have this artifact, though not quite so pronounced. 

When my printer finishes the current print, I'm going to design an l-shaped test to see if I can replicate it and fix it by tweaking the flow.

 

Best Answer by FoxRun3D:

Well-known issue. Look at 

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/buldge-when-print-reaches-solid-layers

and

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/any-tips-to-get-rid-of-the-bulge

plus more threads when you search for bulge or buldge [sic]. 

More than 20 pages of more or less interesting reading -- but no clear solution.

 
Posted : 13/02/2021 5:52 pm
FoxRun3D
(@foxrun3d)
Famed Member
RE: Artifact help

Well-known issue. Look at 

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/buldge-when-print-reaches-solid-layers

and

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/any-tips-to-get-rid-of-the-bulge

plus more threads when you search for bulge or buldge [sic]. 

More than 20 pages of more or less interesting reading -- but no clear solution.

 

Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...

Posted : 13/02/2021 9:32 pm
FoxRun3D
(@foxrun3d)
Famed Member
RE: Artifact help

Actually, @bobstro has compiled a nice summary:

https://forum.prusa3d.com/forum/english-forum-general-discussion-announcements-and-releases/fatter-walls-at-around-layers-between-support-and-overhang/#post-369868

Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...

Posted : 13/02/2021 9:41 pm
Sherri
(@sherri)
Eminent Member
Topic starter answered:
RE: Artifact help

@fuchsr

Excellent!  Finding the right search term is half the battle!  Looks like "buldge" is exactly my problem.  I love how the misspelling works to my favor for it!!

 

Posted : 13/02/2021 10:12 pm
FoxRun3D
(@foxrun3d)
Famed Member
RE: Artifact help

Yeah, kind of hard to find stuff if people don't know how to spel 😁😁😁

 

Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...

Posted : 13/02/2021 10:19 pm
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