Rippling on certain early layers (Rocinante)

[Ghost070]

I printed a part of the Rocinante model (linked below), and it is getting some rippling along certain early layers of the Bambu Metal PLA near the start. I can’t determine a cause and any help would be greatly appreciated.

I’m using Bambu Studio, 3mf from the link below (the 3 errors fixed version). The only change I made was I printed it using the .08mm High Quality preset instead of the .2mm Standard that the file loaded. Other than the layer height, the only other difference I could find is Gyroid.

I’m using new Bambu Metal PLA for the dark parts, new Bambu Basic for the Orange, and eSun PLA+ for the gray.

The rest of the print came out really well, just that part along the bottom at the beginning. I’ve looked in the layers in the slicer and can’t fine a particular culprit.

I’ve done flow dynamics and flow rate calibrations for each filament.

https://makerworld.com/en/models/20204-rocinante-from-the-expanse

Rocinante_from_The_Expanse_1029+fixed+mod Mine.3mf (3.2 MB)

[RocketSled]

Try reducing flow a few percent. Maybe take 10º off your extruder temp. Slow down that layer. Turn up the part fan to max.

[flint723]

Did you happen to run a flow calibration on the bambu pla metal? I’ve never used it myself.
Oh you said you did. You’re right that rippling seems strange on top like a few layers in.

[user_Mutley2133]

Had the same problem with my A1 - eventually nailed it down to flow ratio. How it got as bad as it did I do not know, but once I changed the generic PLA flow ratio from 0.98 to 0.73 it was spot on on the .4 hotend at standard speed.
There is a flow ratio setup on bambu’s Makerworld that I used by Sdot Prints, and there’s one for ech hotend type too.