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Hmm. Usually this is because of thin walls but these look pretty thick. I'm guessing the model has lots of holes in it and sometimes those holes line up with a layer. Cura is called a "slicer" for a good reason. It starts each layer by intersecting a plane with the triangles found in the STL or obj file. Each intersection results in a line. Cura tries to combine those lines into loops for a given layer. Sometimes the loops have holes or openings because the object you are modeling has holes in it.
If the holes are very small then scaling the part slightly moves where the lines hit the holes.
Try looking at the part in xray view and look for tiny red spots (zoom way in). The red indicates something wrong with the model (either internal walls or holes on the "surface").
Here comes Cura 5.9 and in this stable release we have lots of material and printer profiles for UltiMaker printers, including the newly released Sketch Sprint. Additionally, scarf seams have been introduced alongside even more print settings and improvements. Check out the rest of this article to find out the details on all of that and more
We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
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gr5 2,295
Hmm. Usually this is because of thin walls but these look pretty thick. I'm guessing the model has lots of holes in it and sometimes those holes line up with a layer. Cura is called a "slicer" for a good reason. It starts each layer by intersecting a plane with the triangles found in the STL or obj file. Each intersection results in a line. Cura tries to combine those lines into loops for a given layer. Sometimes the loops have holes or openings because the object you are modeling has holes in it.
If the holes are very small then scaling the part slightly moves where the lines hit the holes.
Try looking at the part in xray view and look for tiny red spots (zoom way in). The red indicates something wrong with the model (either internal walls or holes on the "surface").
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