I get this seam in this part. The part transitions from a solid disk to a hollow wheel at this point. The model is one piece in Inventor and has no seam. I can provide the model if needed. X1-C using polycarbonate with default settings.
https://photos.app.goo.gl/tKZ5GSHWAU28FAxH9
It is not a seam. It is known a the “Benchy Hull line” or Wall bulge. It’s a very common issue and is often asked about on the forum.
The 3DBenchy is a 3D model designed by CreativeTools specifically for testing and benchmarking 3D printers. And everyone wants to know, how to print a perfect Benchy. Ever since it’s release, one specific problem seems to be present, in varying degr…
It’s called water or hull line and occurs when there is a large sudden change in layer times where the underlying layer perimeter area(s) contracted before the next perimeter layer above is printed. It’s a common occurrence and is primarily caused by the part design in connection on how FFF/FDM printing works. Amount of walls, infill type, filament material type, temperature deltas, speeds, wall to infill overlap,…etc. are also factors on the perimeter size differences in these areas. Certain slicer settings like printing infill first before walls can help in reducing or even eliminating these water lines but can cause issues like wall to infill separations. Better way is to design the part with this in mind and use features that hide these steps by making it look like an intended design feature or smooth out the transitions by using internal fillets on the adjacent wall
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