GregValiant 1,342
When an STL model is exported from most CAD software it is usually a representation of a 3D solid model. That means it is solid through-and-through. A slicer then determines outer wall, inner wall, and infill.
When certain STL models are created from scans then they are sometimes just a skin. The thickness of the skin is what a slicer has to work with. If you look at the slice of the head in the second image (see below), you can see the (red) outer wall through gaps in the (green) inner wall. That means the "skin" of the model is very thin and in fact in some areas it looks like there is no outer wall at all or it will not print because it is thinner than your line width. Then, looking at the neck area you can see the gaps between the extrusions of the outer wall. That will not print as it is unsupported and printing over air.
The model with the nut appears to have the same sort of problem, but it may just be the way you sliced it. If the parts are solid, then you will need to allow some infill so it supports the areas that approach the horizontal.
In your last image you can see what @ zpm3atlantis referred to. Those extra surfaces that criss-cross the interior of the head are created because that is how Cura is translating what it sees in the model. Some faces may be inside-out.
If you will post the STL files then someone will look them over.
Edited by GregValiant
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zpm3atlantis 32
Hallo Marcus
HiHi Ja das sind die ersten Schritte um 3D Software kennen zu lernen ^^
Polygone haben zwei Seiten sozusagen einen Innen und eine Aussenseite.
Wenn du das einfach so ineinander Schiebst passen die Richtungen nicht mehr und der Drucker tut dann einfach das was er Denkt das richtig ist. Kleinere Fehler werden dadurch meistens korrekt beseitigt. Aber bei sowas kommt dann nicht das heraus was man möchte.
Ich sehe nicht genau was du gemacht hast, hast du den Boden des Kopfes gelöscht?
Grüsse
zpm3atlantis
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