I'm having some trouble with OpenSCAD.

3D Printing
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1

I’m having some trouble with OpenSCAD. I am trying to modify an STL with some cutouts. Everything looks fine with Compile (F5) but Compile and Render (F6) gives either no output, or just one of the shapes that was supposed to have been cut out in OpenSCAD 2014.03 and 2013.01 respectively.

Files are here, the top level is the _Tony.scad: https://docs.google.com/file/d/0B7k-zk3MwdopWGlPUkF1bzRGRkk/edit

I have tried repairing the STL in Netfabb, exporting from FreeCAD and Slic3r with no improvement. The slot() module doesn’t cause issues when differenced from say a cube, so I don’t think my handiwork with that module could have messed it up.

This is the source of the original STL: http://www.thingiverse.com/thing:257667

2

Openscad does weird things with rendering, have you tried forcing it to render() after each difference() operation?

3

Oh, I forgot to mention why I even care! If it just didn’t render on F6, that would be fine, but it exports the STL the same way it renders (almost not there). When it doesn’t show anything, it also shows in the console “No Top Level Geometry Found!”

4

Hi Tony, I’m wondering what you meant by “exporting from FreeCAD”. I analyzed the original STL in FreeCAD and it’s reported as non-manifold, having 4 reverse normals, 3 degenerate faces (whatever that means) and 104 folds. I’d say the fact the STL is bad is probably the source of your troubles. Did Netfabb report repair as successful?

5

Not sure if it is applicable to your situation, but I had a similar problem, and the info here [https://github.com/openscad/openscad/issues/198] helped

Specifically this comment https://github.com/openscad/openscad/issues/198#issuecomment-11428262