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Top Layer Issues, X and Y Surface Quality Questions  

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aykunsezer
(@aykunsezer)
Active Member
Top Layer Issues, X and Y Surface Quality Questions

YXHello! I do have a self assembled MK3S+ Kit which i am very new to. I am printing with overall great quality however i am having 2 issues with Prusament PLA and stock Prusaslicer settings;

1. The top surface keeps having these top layer lines which are perpendicular to the actual top layer directions. Any idea why this might happen?

2. The straight lines of X and Y axis are not completely smooth as i’d expect as seen on the pics. Would they be related with the tightness of the bearings?

Thank you in advance for any help!Top layer

This topic was modified 1 year ago by aykunsezer
Posted : 24/05/2021 8:47 am
JoanTabb
(@joantabb)
Moderator
RE: Top Layer Issues, X and Y Surface Quality Questions

Is the printer 100% standard configuration? 
Can you attach a copy of the Prusa Slicer Project file that you use to print this case please, so that we can see your settings

you can create a project file, by clicking 'File' menu 
then choosing 
Save Projest As

Or you could use Ctrl+Alt+S

once the file is saved, you need to ZIP Compress the file, and attach the ZIP File to the thread

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK

Posted : 24/05/2021 9:19 am
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(@)
Illustrious Member
RE: Top Layer Issues, X and Y Surface Quality Questions

To assist Joan, here's a guide for saving and uploading projects to the forum:

How to save and upload a project

As a side note, these types of artifacts are common when certain infill patterns are used. Slicer now has MONOTONIC infill that attempts to minimize the bidirectional infill that is well known for piling up filament like your example. E.g., using RECTILINEAR infill for internal layers can cause these humps in the top surface (print through). In cases where MONOTONIC still fails (it is good, but not perfect); other infills can be used, though may cause longer print times. 

This post was modified 1 year ago by --
Posted : 24/05/2021 4:14 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

@joantabb  Thank you very much for the assistance! Here is the attached project file for the exact settings I previously used. Looking forward to hear any recommendations. 

 

Best,

Aykun

 

satellite_speaker.3mf

This post was modified 1 year ago by aykunsezer
Posted : 25/05/2021 6:56 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

Apparently above images seem to be corrupted, thus I directly uploaded them to the forum.

 

Top Layer Imperfection X Axis Imperfection Y Axis Imperfection Y Axis Imperfection

Posted : 25/05/2021 7:02 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

Cube flow test Y axis defect Y axis defect 2
An update: Above are the results of the flow calibration cube which came out perfect in terms of flow rates.

However, significant Y axis surface (outer walls) quality issues continues.

Posted : 26/05/2021 6:19 am
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

@joantabb

One last update about the issue;

the print below was printed with monotonic bottom and top infills. Unfortunately having the exact same scars on the very top surface. 

Top infill scar monotonic

Posted : 26/05/2021 4:46 pm
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(@)
Illustrious Member
RE: Top Layer Issues, X and Y Surface Quality Questions

@aykunsezer

Got the ball, not the grill.

Posted : 26/05/2021 6:29 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

@tim-2

I’ll be sending the grill in a minute!

Posted : 26/05/2021 6:30 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

Here's the project file of the grill as well. Will be happy to get any further recommendations. Thanks!

 

@tim-2

Grill Project.3mf

Posted : 26/05/2021 6:48 pm
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(@)
Illustrious Member
RE: Top Layer Issues, X and Y Surface Quality Questions

Have you done a calibration cube?

https://help.prusa3d.com/en/article/extrusion-multiplier-calibration_2257/

Also would be helpful to know the actual diameter of your filament in use.

ps: I suspect it is the print speed / flow you are running into. Slow down the infill speeds and your top infill layers should improve and give you less print through.

This post was modified 1 year ago by --
Posted : 26/05/2021 6:51 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

@tim-2

I tried to check the flow by printing a 40*40mm cube with vase mode which led to perfectly 0.45mm walls thus, i thought the flow is just fine.

Actually I didnt print the calibration cube you shared though. Wouldnt it lead to the same end result?

 

I’ll try the same print with slightly lower infill speeds and share the results accordingly. It is quite weird to see that 4 top layers doesnt cover up the scars though.

 

Posted : 26/05/2021 7:14 pm
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(@)
Illustrious Member
RE: Top Layer Issues, X and Y Surface Quality Questions

@aykunsezer

Extrusion is always a place to look when excess plastic is being extruded. But the pattern I see is the typical bi-directitional infill collision pileup - several github issue reports about it. Monotonic infill was Prusa's solution, but they need to carry the option to include all solid layers. 

Regardless of the infill issue, and more to the point, you are using a speed/draft print profile, not the quality print profile. And worse, you changed top layers from the default 5 down to 4, further compromising the upper layers and increasing print through. So to expect a perfect top layer is probably unrealistic with your settings. 

If you want a high quality surface, use a high quality profile.  

All that said - yeah - it's frustrating when we've asked for a fix, but got a half measure in return. I'm one of the ones who complained about this issue years ago and it's a bit disappointing to see what they did .

https://github.com/prusa3d/PrusaSlicer/issues/2556

This post was modified 1 year ago by --
Posted : 26/05/2021 7:45 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

@tim-2

Thank you so much for all the explanation!

I’ll be trying the quality print profile and see if that changes anything on the print.

 

Also, i’ll be trying superslicer and use monotonic infill throughout the whole print and check if that solves the issue for good as well.

 

that being said, it really is disappointing to have a partial solution instead of a complete one as it is quite obvious.

This post was modified 1 year ago by aykunsezer
Posted : 26/05/2021 7:50 pm
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(@)
Illustrious Member
RE: Top Layer Issues, X and Y Surface Quality Questions

https://github.com/prusa3d/PrusaSlicer/issues/6561

Posted : 26/05/2021 7:51 pm
Cipis
(@cipis)
RE: Top Layer Issues, X and Y Surface Quality Questions

https://github.com/prusa3d/PrusaSlicer/issues/6561#issuecomment-849081654

Posted : 26/05/2021 8:09 pm
aykunsezer
(@aykunsezer)
Active Member
Topic starter answered:
RE: Top Layer Issues, X and Y Surface Quality Questions

@cipis

thanks for the reply! any chance we could try the current master as well? 

Posted : 26/05/2021 8:45 pm
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(@)
Illustrious Member
RE: Top Layer Issues, X and Y Surface Quality Questions

@aykunsezer

All you'd nee to do is download and compile the code then flash it.  But you're on your own to do all that - and the code is probably buggy as it is prerelease.

This post was modified 1 year ago by --
Posted : 26/05/2021 10:15 pm
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