I have a really strange problem that i am hoping someone can help with.
when using Cura 15.04.6 and PETG filament i get perfect top and bottom layers / infill. when i use the same stl file and temperature, flow, retraction etc settings in Cura 2.7 the top layers dont touch the perimeters and there are voids.
I spent all of yesterday trying different extrusion multiplier. infill line width, infill wipe distance but none of these fixed the problem.
I want to use the later version of cura for the improved support options including the support interface but if i cant get the top solid without voids i will have to stick with the older Cura and put up with less options for support.
Left square is from Cura 15.04.6 and right square is from Cura 2.7.