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Creating or Editing a Model
You can design your object in any 3D modeling software. There are many free software programs available. Here are some options: Sketch Up, Blender or, AutoCAD.
You can also use or modify a pre-existing file from a design library.
Export your model as a stereolithography file, with an STL extension (.stl).
Maximum size is dependent on the printer you choose. Layers must be at least 0.1 mm thick (0.020 in).
We recommend you build your model in millimeters. Or convert to millimeters before submitting the final file.
The standard resolution is .2 mm per layer, with 10% infill.
If your model includes multiple parts, make each as a separate STL file. You can submit each model as part of the same print request.
The surface of your 3D model must be watertight. This means all faces of the object must construct one or more closed volume entities. Gaps or holes in the model will cause it to print incorrectly.
See Rhino's How do I Make a Solid Model.
Your final model should not contain any 2D elements, as they can cause naked edge problems. Delete any 2D elements that were used to create sweeps, lofts, or other complex shapes.
Check your design for holes, gaps, or other problems before submission. Numerous third party tools can help you fix geometry problems, including:
Shapeways offers a tutorial for fixing and repairing 3D models using these services.
Other things to be careful of when creating your model:
