I struggle with the PETG Basic from Bambulab a bit.
The print looks perfectly fine, but just before the seam it looks like this:
I use the default settings and do not have this problem with any other filaments and their default settings.
Can someone give me a hint on what might be wrong here?
Speed! The Bambu PETG doesn’t like high speeds. I did some tests and reduced all speeds in the process settings to 120 mm/s. At default speeds, it prints very matte, which is a hint for reduced strength. You will notice that it prints much more glossy at lower speeds.
I think in the bottom part you don’t see those defects because there, Bambu Studio reduces speed on its own to achieve sufficient time per layer.
I’m really going to be interested in whatever solution you find. Good luck.
@froop typical PA(K) factor calibration possibly a bit flow problem for PETG . assuming the speed external perimeter is bellow 120mm/S problem for PETG and assuming the filament is dry . aslo a bit higher temp probably
Calibrate the flow and PA(K) and make sure that slightly reduce it of measured
PA(K) a bit under than measured - my one is around 0.5 and i use 0.42-0.45
and flow as well my flow measured is 0.99 - 1.0 and i use 0.96
These are at boosted temp 255C/260C
Also you can look some more in detailed discussions here or many other forums:
Is this correct or should it be “… 0.05 and i use 0.042-0.045”? Or maybe I’m entering it into the wrong spot. The default value on that screen was 0.020.
@Slobber_Monkey in typing missed one 0 - 0.05 and 0.042-0.045
the 0.02 is good starting point for PLA
Thank you!
I don’t seem to have the same settings as you do. I’m using Bambu Studio and have a P1S. What are you using?
@Slobber_Monkey I am using orca slicer ,in general do not use Bambu slicer . And i do not use the Dark mode 
But when using Bambu slicer for trials or anything to check , i add the flow in the custom G code for the filament
M900 K[pressure_advance] L1000 M10; BS transfer test based on Orca slicer output. – but this will work only if already set by Orca slicer , the one for manual entry is with K factor of 0.045 you change it to what ever you need
M900 K0.045 L1000 M10;
EDIT: Also i enabled Development mode which is exposing some hidden options , but Advance mode is enough for both Bambu and Orca slicers
