Slower wall speed after bridging and overhang because of cracks

[joh]

Hello i am trying to print a part with countersunk holes for screws. I am using the P1S printer with PETG basic filament, and slow down for overhangs. The problem is that the outer wall isn´t printed properly after printing larger overhang parts. I think the problem may be that the head slows down to print the overhang, and then continues too fast for the outer wall of the part, because it seems like the filament doesn´t stick to the layer before. I also used supports, but it didn´t help.

I am pretty new to 3d printing so i don´t know all of the settings, is there a way to set the speed of the nozzle for following walls after printing overhangs? Or is there another way for fixing this?

Thanks LG

[EnoTheThracian]

PETG should be printed newly dryed. After that, it needs to be calibrated. Depending on the filament brand, type and even color, settings may need to be tuned as well.

The slow down for overhangs used to be a bit of an issue regarding flow rate changes but the Smoothing setting can help with that.

But you may probably want to think about countersinking the holes. FDM parts have highly anisotropic strength values so that forces with a compressive component in layer direction are a bit of a risk.