ASA problems

[JonRaymond]

A couple points.

Printing an upward facing radius will cause issues.

@JonRaymond

It’s important that you use a chamfer rather than a fillet. A fillet will create a severe overhang which will look ugly when printed. A chamfer is normally a straight 45 degree wall which the printer will handle very nicely.

If you still want a fillet on the bottom of your print you can start with a chamfer and then fillet the top edge of that chamfer. By doing it this way you avoid creating a bad overhang. The picture shows the difference. Notice the red highlighted overhang which will be difficult to print compared to the easy 45 degree angle of the chamfer+fillet combo.

The rough top surface is often caused by a part warping up. 6 wall perimeters are going to put heavy warping stresses on a part. Try using less wall perimeters. 3 is generally optimal and use modifiers to increase walls in specific areas that need more strength.