Forgive any silly questions (that I don't yet recognize as silly). My basic problem is that after importing an stl, making modifications, and then using this plugin to export to an stl, I get complaints from slic3r 0.7.1 (which turns it into gcode for a 3d printer) about the object not being "manifold". I suspect this has to do with adding a circle to the bottom of the imported structure and extruding it. My guess is that the extruded circle is not composed purely of triangles.
Here's how I got here:
- I took this center hub (http://www.thingiverse.com/download:24653) which is a part of http://www.thingiverse.com/thing:7980.
- I imported the stl into sketchup 8 using jf_stl_importer.rb (https://sites.google.com/site/jimfoltz/sketchup/my-sketchup-plugins/stl-importer)
- then I added a 2mm "raft" to the bottom of the structure.
- then I exported from sketchup to stl using this plugin.
- and then used slic3r to generate gcode. slic3r 0.7.1 says "the input file is not manifold", which is probably because the structure generated by sketchup is a polygon, and not a collection of triangles. Or that's my guess.
Can you point me at a a general approach to avoid this problem in the exported stl? Thanks in advance.