4-Axis Foam Cutting Machine

This project involved the design and construction of a custom 4-axis CNC hot-wire foam cutting machine intended for rapid fabrication of aerodynamic components. The system was primarily developed to manufacture wing sections and fuselage profiles for SAE competition vehicles and personal VTOL aircraft projects, while remaining flexible enough for broader prototyping applications. The machine enables synchronized motion across four axes, allowing complex tapered geometries to be cut accurately and repeatably from foam stock.

Aerodynamic prototyping for student competition teams typically relies on manual hot-wire cutting or outsourced CNC services, both of which introduce limitations. Manual methods lack repeatability and precision, while commercial multi-axis CNC foam cutters are cost-prohibitive and inaccessible for student teams. The challenge was to create a low-cost, in-house manufacturing solution capable of producing accurate airfoil and fuselage geometries without sacrificing flexibility, precision, or iteration speed.

To keep the system accessible and cost-effective, most custom components were 3D printed, including mounts, bearing housings, and alignment fixtures. Aluminum extrusion and laser-cut plates were used where higher stiffness was required, enabling rapid iteration and quick mechanical fixes during development.

The completed machine successfully produced repeatable, high-quality foam components for aerodynamic testing and competition use. It reduced prototyping time by approximately 50% and enabled fast iteration for complex geometries.