3. The creation of a reverse surface in CopyCAD:
In reverse engineering, the construction of the surface is a very important task, and it is also the work with the most workload. The construction surface is not composed of a simple surface, but needs to be composed of multiple surfaces that are extended, transitioned, and cut. The surface, and therefore the quality of the structure, determines the success or failure of the reverse work.
There are several ways to create a surface in CopyCAD:
1.) Create a reverse surface directly on the triangular patch solid model. When constructing a surface, it is necessary to construct the sub-region according to the shape change trend of the triangular model. At the same time, according to the requirements, the tangent relationship between the surface and the model and the adjacent surface can be adjusted, and the precision and smoothness of the surface can be controlled by adjusting the number of internal curves of the surface.
2.) CopyCAD can create NURBS clipping surfaces through the automatic wizard. The use of a cropped surface fit allows for the fitting of complex faces in less than one step, which makes the surface smoother and reduces the amount of work.
3.) CopyCAD can generate planar surfaces directly by selecting points on the STL model.
4.) CopyCAD also provides a way to generate uncut surfaces directly from point clouds. Select some or all of the point clouds to directly generate uncut NURBS surfaces, and control the fit and smoothness of the surface to the STL model by controlling tolerances, number of patches, and surface degrees. This method can quickly generate high quality NURBS surfaces.
CopyCAD provides the error analysis function of the surface. The generated surface can be compared with the original point cloud or design model. The generated color map and error report can be used to determine the position and size of the error, which is convenient for adjusting and editing the surface.
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