This PDF file describes the process of cleaning up a scanned mesh and making it ready for STL printing. (There are CAM programs that can take mesh files, if that's the problem.) And if you do need to, then either get help from someone with the Rhino experience–there's no trick, you just have to know Rhino really really well– or get specialized reverse engineering software needed to do it in a reasonable time frame. My advice would be to not undertake this point cloud to NURBs task unless absolutely necessary. I've done it and it is not an easy or particularly enjoyable process, unless it's a terrain map in which case it should be feasible to get something with Patch. Reverse engineering is about the hardest thing to do in Rhino, depending on what the scanned item is. To navigate, click the little text angles at the very bottom right of each page. Look here and the following pages for applications that automatically create NURBS surfaces from point clouds or meshes. But you could also use the PointCloudSection command in Rhino to reverse engineer curves first, then use those curves to construct NURBs surfaces. The Patch command is the only tool you can directly use to create a surface from a set of points. Rhino 8 improves this process a step further than Rhino 7 by adding the ShrinkWrap command. However, depending on your requirements, Rhino might have enough tools to get the job done. Rhino is not a reverse engineering program, since there are many aspects and tools needed to do reverse engineering. Therefore by reverse engineering it back into a geometry that can be transformed with matehmatical precision, such as NURBS, the object can then be manipulated and edited to taste and sent back to any kind of prototyping machine. For instance, you cannot define precisely a radius or curvature on a mesh. This precision is often required to manufacture the model back into a physical object. However, due to its nature, meshes are hard to manipulate in a precise way. A mesh is a succession of flat polygons that define a shape in 3D space. The file is finally created and ready to be used in AutoCAD.Reverse Engineering is the process of transforming a Mesh or Point Cloud, usually coming from the scan of a physical object, into a type of 3D geometry that can be editable to manufacturing standards. End: Click on the Ok button to quit the dialog.Save the Export schemes: Click Save or Save as on the right side of the dialog if you wish to use this edited Export scheme next time you export in the.Curves Tab: Export Lines as Lines, Arcs as Arcs, Polylines as Polylines, and Curves and Polycurves as Splines.General Tab: Export Surfaces as Solids and Meshes as Meshes.These are the most important settings to take into account: AutoCAD Export schemes settings: In the image below you can see the most commonly used settings for the 2007 Solids scheme with a few changes.DWG/DXF Export options dialog: Select 2007 Solids as one of the most commonly recommended export schemes, but click on the Edit schemes button to make sure the settings are correct for a proper export result. A new dialog will appear with the AutoCAD export schemes settings.A new dialog will appear with the list of DWG/DXF Export options. dwg file type to save the document.Ĭlick on the Save button. Specific geometry: Select the geometry in the model you wish to export, select the option Export selected in the Rhino Menu File and specify a file name, directory and the.All document: In the Rhino Menu go to File > Save as and specify a file name, directory and the.you can export all the geometry to AutoCAD in a few steps: After creating a project with Rhino and VisualARQ and generating the documentation drawings such as the floor plans, sections, elevations, etc.
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