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SketchUp: Hole Does Not Pass Through at 3D Printing Services

Some times when I make models with holes in SketchUp, after exporting them to DAE or STL file format, the holes are plugged in after uploading to 3D printing services. The screen shot shows an example of this problem.

This occurs at both Sculpteo and Shapeways 3D printing services.

Attached Image:

Hole Not Pass-Through.png

Dak
Sat, 24 Jun 2017 18:19:06 -0700

As you can see from the model below, it does indeed has a pass-through hole. But a hint where the problem lies is the circular line within the tube.

Attached Image:

Model Has a Pass-Through Hole.png

Dak
Sat, 24 Jun 2017 18:20:46 -0700

If we hide the back plane, we see that the model is not completely hollow. There are geometries inside the mode. These geometries confuses the 3D printing services. The solution is to remove all of the internal geometries.

Attached Image:

Hide Back Plane.png

Dak
Sat, 24 Jun 2017 18:22:35 -0700

The following screen shot shows all of the geometries are removed.

Attached Image:

Internal Geometries Removed.png

Dak
Sat, 24 Jun 2017 18:28:39 -0700

Once the model is hollowed out properly, uploading to 3D printing services works just fine. The screen shot of the model on the 3D printing service now shows a hole.

Attached Image:

3D Model Now Has Hole.png

Dak
Sat, 24 Jun 2017 18:32:13 -0700

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