The CNC Foam Cutter consists of an electrically heated wirer that cuts (melts) through Expanded Polystyrene (EPS, XPS), Expanded Polypropylene (EPP), Expanded Polyethylene (EPE), and Semi-rigid polyethylene foam (XPE). The wire is guided by two XZ computer controlled traverses at each end of the wire. Any 3D object that can be defined by straight lines can be cut out. This includes rectangular, tapered and swept wings.