Infill prints before walls for first 2 layers
 
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André
(@andre-2)
New Member
Infill prints before walls for first 2 layers

Hi all,

I am running PrusaSlicer 2.2.0 and apparently out of nowhere settings changed. I did not install any updates or something, I just played around with Retraction settings. Now, for the first 2 layers of the print, the infill is done before it prints the perimeters.

I actually have 3 or 4 layers bottom solid infill before I start the infill pattern. So in that case the first 2 layers are printed infill first, and then for layer 3 on it changes back to normal "perimeters before infill". If I use the PrusaSlicer setting "infill before perimeters" it changes it for the whole model to be infill first, but even if it is deactivated, the first 2 layers do infill first right now. What is that?

Best,

André

Posted : 17/07/2020 7:51 am
Neophyl
(@neophyl)
Illustrious Member
RE: Infill prints before walls for first 2 layers

Strange it doesnt for me.  Can you save your project file where this happens and zip it up and attach it (forum doesnt accept most file types but does accept zip archives). 

It may be that you have some weird setting activated.  As a project (3mf) file saves the model and all the slicer settings used it should happen if someone else tries to slice the project.  Unless you have had some corruption happen to your profiles which isnt beyond the realms of possibility.

Posted : 17/07/2020 3:02 pm
André
(@andre-2)
New Member
Topic starter answered:
RE: Infill prints before walls for first 2 layers

Hi thanks for your reply! I just tried to reproduce it and it turns out, it seems to be model dependent?!

This octopus was causing the problem, with the setting I attached I got the first 2 layers "infill before walls" and then it switches. Funny: If I rotate the model bei like 45° its just one layer before it switches... very confusing.

However, for another model I just tried it worked fine...

fcktopus

Posted : 18/07/2020 9:27 am
nietaki
(@nietaki)
Active Member
RE: Infill prints before walls for first 2 layers

I think I just got the same problem.

I spent most of the day trying to tweak PETG printing profiles and watching the first couple of layers carefully. On nth attempt, when printing multiple objects (MK3S spare parts) at the same time, one of them got printed infill first.

Here's a picture of this happening. You can see most of the "internal" perimiters are printed and the external was getting printed - counterclockwise, the nozzle was on the left hand side:

I am positive I didn't have "infill before perimiters" enabled, but I'm not sure the .3mf project is the version that contains the problem, I've been playing around with it all the time.

Here's a link to a .zip containing the .3mf, the GCODE and the photo: https://u.pcloud.link/publink/show?code=XZgsiBXZsgdmrnKsSE4eG1v49cP0IzrNwloy

Seems like a bug to me, I just wanted to bump the thread before I raise it on github.

 

Posted : 19/03/2021 7:31 pm
nietaki
(@nietaki)
Active Member
RE: Infill prints before walls for first 2 layers

Update: I deleted theobjects on the plater, imported and sliced them again and got a similar result.

However, closing PrusaSlicer, starting it again and importing the very same files worked this time. It might have been a fluke, I shouldn't draw conclusions based on this one case, but it might be worth mentioning for anyone who runs into it in the future, to see if they have similar results.

Posted : 19/03/2021 8:21 pm
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