This is as true for insulation board as it is for the ubiquitous expanded polystyrene kind of foam used for everything from coffee cups to packaging material. Those stick-type hot wire cutters ...

While there are all sorts of ways to build a hot wire foam cutter, this design from [jasonwinfieldnz] is both interesting and imitable. If you don’t already know it, nichrome wire is nifty stuff ...

The project provides a slicer that inputs STL files (3D models) then finds various outlines that can be cut out to create the shape using a foam cutter. The=is path is then converted into G-Code which ...