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CADspan is a risk free, and easy to use mesh processing software tool set. You can choose from the online version or use the plugin for SketchUp. Then, simply upload files from your CAD software, submit them for processing, and in a few minutes your output STL file is ready to review.
CADspan lets you take a “what you see is what you get” approach to concept modeling, letting you worry about your design and not about whether or not your model will be printable.
CADspan lets you break away from expensive solid modeling programs. You can now use inexpensive sketching and creative modeling tools and still be able to quickly create physical models on the new 3D printers.
Download the CADspan plugin for free: For Windows SketchUp 6-8 For SketchUp 2013 For Sketchup 2014 and newer