Why is PLA behaving like this?

[oskars 0]

Hello!

 

I'm troubleshooting this messy print quality...

 

Cura 4.7.1

Nozzle size 0.8

Layer height 0.25

Wall thickness 1.7

Infill 20%

 

Printing at 220 celcius and I have tried to go down in speed and even raising temperature with no success...

 

What would you say is the cause of this?

[Smithy 1,144]

Have you tried to clean the nozzle with some hot/cold pulls?

 

How old is your TFM coupler, does it look bad?

[oskars 0]

I switched to a new TFM coupler before summer. Haven't printed since then I think.

 

Nope. Haven't cleaned the nozzle. Might that be a cause? If it is not cleaned the extrusion wont be as good, and may result in this quality?

[Smithy 1,144]

Yes, I would give the nozzle a good cleaning before looking for other reasons. If the nozzle is partly clogged it can happen that you don't get a consistent extrusion. 

 

Another idea, have you tried a different filament spool?

[Smithy 1,144]

And a third idea, after you have tried cleaning the nozzle, try if the Cura option "Outer before inner walls" helps.

[fergazz 60]

yeah... procede cleaning the nozzle as Smithy said... atomic method

 

And them.. if this doesn't helps try another old version of Cura cause this 4.7.1 is not stable yet and it's ocorring some issues (blobs) in the outter shell. 

 

By the way I can see slightly underextrusion and blobs on the wall if I'm not wrong