ynilsiam

I just want to be clear about the question. Please see the image below. The path starts with the red path then the 2 green paths and then jump out to black and print for a couple line, then jump inside, and so on. I want to print a 100% solid object with concentric pattern. Is there a way to start the beginning path from the edge? Thank you very much.

I try to print a cylinder with a hole in the middle. Why the beginning of the path starts in the middle of the layerpath, not the edge? Is there anyway to change that? So the print goes only one direction in each layer, not jumping back and forth. Thank you very much.