What are some typical problems encountered with converting common 3D mesh formats from modeling software to 3D printer ready formats

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The most common issues are:
A lot of people don’t know the default units of their 3D modelling apps so this also confuses.
There could be holes in the mesh that need to be repaired for it to print.
There could be nonmanifold areas in the mesh that also will lead it to not print.
There could be inverted triangles (inverted normals, inverted face normals)  that would also need to be flipped for it to print.
There are also additional issues such as walls that are too thin for the thing to be actually made or the thing might be too big for the printer.

You can solve these issues manually by adjusting or repairing the mesh in your 3D modelling app.

Many 3D modelling tools have built in tools that let you fix triangles and other issues.

Rhino has the command “UnifyMeshNormals” for example.

In Blender CTRL-N flips the inverted normals.

Other than that it is just a question of manually closing holes or removing nonmanifold geometry. 

You can also remesh, automatically repair or manually repair your file in tools such as Meshlab, Magics and Netfabb.

The last two have automatic file repair tools that let you do this very easily.

Magics is better but expensive.

It would be the package to use at BMW or if you had a service bureau and is the standard for the industry.

For home use Netfabb is free as are MiniMagics and Meshlab (Meshlab is also open source).

You can also use Magics, Netfabb or MiniMagics to visualize the issues and then repair them in your 3D modelling tool.

I currently use MiniMagics as my default STL viewer and Netfabb for file repair (Minimagics loads faster and I like its view better).

(Disclosure, I used to work for Materialise, the company that makes Magics and MiniMagics, but I’m pretty sure that my answer is fair and would be indicative of what another person in the industry would say.)

MeshLab
STL Viewers and STL repair
Software for additive manufacturing
Software for additive manufacturing

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ITIL Foundation - eLearning Plus exam Prep and What are some typical problems encountered with converting common 3D mesh formats from modeling software to 3D printer ready formats

ITIL Foundation - eLearning Plus exam Prep - What are some typical problems encountered with converting common 3D mesh formats from modeling software to 3D printer ready formats

ITIL Foundation - eLearning Plus exam Prep and What are some typical problems encountered with converting common 3D mesh formats from modeling software to 3D printer ready formats

ITIL Foundation - eLearning Plus exam Prep - What are some typical problems encountered with converting common 3D mesh formats from modeling software to 3D printer ready formats

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