I've recently purchased an Ender 3 and have had great success with some Cura settings found on a YouTube Tutorial at 0.2 mm resolution.
So then I noticed that there were default settings in Cura for the Ender 3. Except printing at 0.2 mm it selects a 20 % infill, and when choosing 0.1 mm it changed the infill to 10 %.
I changed infill to 20 % and attempted to print this but there were gaps in the bottom layer and it won't stick to the bed. Is there anything else I need to change in the process?
The shape is essentially a cube with a circular hole in the middle, sliced in half.