3.1.2. Analysis of the Digital Files

The first problem consists in the management of the files and the organization of the subassemblies. Although the original model could have a certain organization by the different subassemblies, files in step format can lose part of the information when they are imported, so it is necessary to review and order their content.

File management begins with the detection of geometry problems. The fact that much of the digital model will be printed in 3D requires working with solid geometries, rather than surfaces. This factor is also important for the creation of plans since in Fusion 360 the elements modeled with surface geometries cannot be visualized in the 2D plans.

In the following pair of figures (Figure 2a,b) the received model (located on the left) and the model converted to solid are displayed. In the original file, solid geometries are perceived in the lower part of the subassembly, while in the rest, no cuts are generated because they are surface geometries. However, once the primitive geometry has been modified to solid geometry, the cut is visible throughout the sectioned part.

**Figure 2.** (**a**) Digital model with surface geometries. (**b**) Digital model with solid geometries.
