Smudgy/ripply top layers & solid infill
Any ideas where these smudgy top layers come from? Especially the corners?
It's a VC3.1 400, enclosed, Rapido UHF fed by Orbiter. PLA, printed after excessive heatsoak, 0.6n, 0.4lh
I did: tune PA, checked my rotation distance, calibrated flow, reduced extrusion width on top layers and top solid infill to 0.41, reduced infill/parameter overlap to 5%. Sliced with PrusaSlicer 2.8.0
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can you try without top and front panel so that the champer is vented for PLA?
I have my front open and have a separate temperature sensor and fan for the chamber. It maintains 25°. Should be fine...
I printed the same gcode without PA - looks the same.
What's your print speed and your extruder temp
I faced similar problems the past days.
One of my finding is that my T0 is hotter than displayed which caused ripples on my top layers while printing at 210 C because it was actually at 230-240C.
After reducing it to 190C I gor better
This way my primary source for the ripples
The 2nd problem afterwards were gaps + ripples. This was caused by an to high print speed (Default profile in PS is not suited for PLA @ 200mm/s lol)
Reduces it for testing to 100mm/s max and got a perfect top layer
@boinappi have you made progress?
Not really:
I followed https://ellis3dp.com/Print-Tuning-Guide/articles/first_layer_squish.html and realized that the first layer squish has quite an impact to top surface layer quality, even if the top layer is in a higher layer with sparse infill below, which allows the filament to relax. I also learned that the stock print bed is quite tolerant to first layer squish.
In the pictures i posted i printed with 3 top layers. The finishing, smudgy layer is printing significantly slower. The layer before has a lot smoother surface than the final layer, which could be a sign that i don‘t fight with thermal x-gantry issues, but i can‘t prove it yet.
I also need a more structured approach to this issue - there are yet too many variables. I implemented a heat soak script (did it manually before) and (can someone confirm this could be an issue?) do my tests with a stable room temperature.
Btw.: happy new year and trouble free 3d printing 😉
Okay - finally some new insights:
I am now at a stage where i can rule out two major culprits of my prior prints:
1) warping
2) thermal x-gantry issues
Both got better with a heatsoaking script. I did heatsoaking before, but i guess my manual approach was not good enough.
Additionally i calibrated first layer squish, which has major effects on top surfaces.
v0: This is not perfect yet - but already way better than before. You can spot some fins along the edges and - which i think is much more of an issue: one corner with more material (nearly a blob).
Questions: Why this corner? Is this PA related?
Print info: 0.6n, 0.3lh, 10% infill, 4 top layers, 40x40x10
This could be related. Unfortunately they didn‘t find a solution. https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/blobbing-at-corners-of-print-only-on-one-side-help/
Original Prusa 3D Printers
Blobbing at corners of print only on one side, help!
I work with pixel art and will be doing a lot of tight-cornering prints, and I’m having a bit of a surface issue. This only occurs during the infill ...
v1: Reduced top layer speeds and solid infill speeds to 1/4 of the print speed of the last version. Not really a great difference. Will focus on PA now.
Hello do you get any succes ?