hi,
this part prints pretty well,
but I am not confident with the first layer.
there are always some lines in the first layer that are underextrudet
but this side should be perfect.
p1s
petg 0,16mm first layer 0,2mm 236° azur film filiament
panda cryo smooth plate 70°
filament well dryed and well calibratet.
I would expect a more uniform bottom surface, especially with a textured plate. I use OrcaSlicer calibrations for at least nozzle temperature, flow rate, and pressure advance.
Poor bed tramming and levelling can be an issue for large prints but that part is small enough that I don’t think that is a factor here.
You might want to at least try OrcaSlicer using your current filament preset, but with a bit higher flow ratio on just the bottom layer. (Studio does not offer this adjustment.)
OrcaSlicer will sync presets with Studio through the Bambu cloud. You can download it here by scrolling down to “Assets” and selecting the package for your computer.
Been calibrating filaments today and also having issues with first layer, kinda makes me wonder is this a feature with the bambustudio update today that also got into orca.
What amount would you suggest bottom surface flow ratio should be increased, to 1.05? assuming that would be 5% increase
thank you,
I used orca now for a while but I never noticed that first layer flow ratio line.
may be because im using the german translation.
never the less I tried values from 1,05 up to 1,3 but completely with no effect.
the issue gets more worse.
here x1,3 with changed layer direction
wondering why?
Afraid I am out of ideas. More flow is not helping and I cannot imagine that less would be an improvement.
This is typical of what I get with a 0.4 nozzle in PETG with the textured PEI plate. In real life, you have to look very closely to see the lines.
It may not help with that much apparent underextrusion, but try turning the nozzle temperature up 5-10 degrees or so just on the first layer, then back to normal. Also try slowing the first layer down a bit more than the default first layer speed. Maybe that combination will at least spread it out a bit smoother.
This looks like over-extrusion to me.
Over-extrusion doesn’t help to achieve clean and uniform bottom surface.
It just makes 1 strand overlap the previous. And where overlapping happens, it’s harder for plastic to flow into and forming air bubble there.
now I tried :
10° more on the first layer— no improvement
50% from the original printing speed first layer—no improvement
95% less flow rate----- already much better 
that is the way…
thank you
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