I am trying to create a dust collection hose connector. It is a simple empty tube about 2.5" in diameter, about 2 1/8" long with a 1/8" ridge around the outside in the center. My intention is to 3d print the model, but when I slice it, I get an error about non manifold edges. I understand that this is caused by more more than two faces sharing the same edge. I cannot see anything wrong with my model. Any Ideas?
Share the .skp file so we have some hope of helping you identify the problem. Are you still using SketchUp 2017 Make?
I am having over 10 years experince with 3D - print from SketchUp model. Happy to help.