Hi,
We have been trying to get a decent print of UNC threads off of our Printer. Ultimaker 5 using Cura slicer. Variety of materials. We have gotten one good part that can print repeatedly in ABS, Polypro and even Kynar. But every part since, modeled in either Inventor or Fusion, has had the threads coming out on an angle leaning upward in the direction of the print (bottom up). The threads are also kind of squished, and have a seam running down one side. Needless to say we cannot get a nut on any of these.
What questions should I be asking, or information should I be giving.... and what, if any, suggestions do you all have? I have tried with nominal thread data for 1/2-13 UNC Class 1A... with and without an offset "fudge factor". The attached image (look at the shadows) is of a standard 1/2-13 hex bolt, the middle orange piece is the one that works though you can see the angle there as well, the third piece is from this morning and the leaning angle of the threads is pretty visible in the shadows.