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Why does this happen (circled in red), and how can I fix it? It is making my prints come out horrible.

Not shown in the picture, but the option "Coasting" was Enabled:

  • Coasting Volume 0.064 mm3
  • Minimum Volume Before Coasting: 0.8
  • Coasting Speed 90%

Rendered G-code view of a sliced model

1 Answer 1

I have had a similar thing happen when slicing a large piece that has - in real life - walls of about 2 cm. By scaling it down to 1.5%, this become less than the wall thickness, and the wall was simply omitted by CURA.

In my experience, a model showing gaps can have in these locations a thickness less than 1 wall.