Export for CNC

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Native SketchUp Pro can export true arcs and circles, make sure to set up your .dxf 3D export correctly.

Is there a plugin that supports curves?

For 2D toolpaths (CNC router,plasma,laser,water jet…) SketchUp can output true arcs in the .dwg and.dxf formats. Although as a surface modeler SketchUp represents all geometry as lines or collections of lines, for arcs and circles it does store the underlying radius info in the metadata and that can be accessed to export mathematically correct arcs. Basics: Make a 2D shape with either arcs or circles. Place it flat on the XY plane. Set the Camera to Parallel Projection and choose the Top sta…