Which tool is primarily used by engineers to create 3D part models for additive manufacturing?

The primary tool used by engineers to create 3D part models for additive manufacturing is computer-aided design (CAD). CAD software allows engineers to design complex geometries and produce precise models that can be easily modified and optimized for manufacturing processes, including additive manufacturing. The CAD system is specifically designed for designing and documenting drawings of mechanical components, making it an essential tool in the engineering field for producing accurate 3D representations of parts.

While 3D modeling software may encompass a broader range of applications, CAD is specifically tailored for creating engineering designs and specifications. Virtual reality simulation provides immersive environments for visualization and testing but does not inherently create models meant for manufacturing. Digital fabrication platforms, although relevant in the context of manufacturing, are generally tools for executing designs rather than the primary means of creating those designs. Thus, CAD stands out as the foundational tool for generating the digital designs required in additive manufacturing.