From ProtoLab Wiki

RhinoCam is the software used to create toolpaths for the ShopSabre, and is available on every computer in the IdeaShop. If you do not have much experience using Rhinoceros or RhinoCam, have a staff member help walk you through the process, since it can be tedious. Before creating a toolpath, feel free to use AutoCad to create the 2D geometry you wish to cut out since DWG files from AutoCad can be opened and used to create toolpaths in Rhinoceros. After creating and opening a file in Rhinoceros, double check the geometry and delete any duplicate lines or points. Join the remaining lines to create one solid geometry. Once you have your final geometry, you can begin creating your toolpath. If you are familiar with this process, go ahead and create the toolpath. If you are new to this process, have a staff member come and assist you. If you create the toolpath without a staff member, before you generate the G-Code, have a staff member double check all the settings and parameters you set for your toolpath.