This diy foam cutter is relatively cheap and the results are quite impressive.
4-Axis CNC Hot-wire Foam Cutter (Arduino+Ramps1.4) : 9 Steps (with Pictures) - Instructables
MPCNC 3d Printed Foam Cutters - rcKeith
New Hot Wire Foam Factory #052 Sign Maker 4-Axis Foam Cutting CNC Machine Proudly Made and Supported in the USA! DETAILS: A Sign and Display Maker's
Foam Cutting 4-Axis Sign Maker CNC Machine For Giant Letters, Signs, Props
It Finally Happened: 5 Axis CNC for the DIY and Maker - CNCCookbook: Be A Better CNC'er
Arduino CNC Foam Cutting Machine - How To Mechatronics
2023 best 4 axis CNC foam cutter is used to mill & cut foam board, Styrofoam, EPS foams, XPS foams, and rigid polystyrene foams to different 2D/3D
2023 Best 4 Axis CNC Foam Cutter for Sale at Cost Price
ULTIMATE Bee CNC Router Machine Full Kit – Ball Screw Quiet Transmission
4-axis CNC Foam Cutter using Marlin 3d Printer Firmware - rcKeith
How to build a Hot Wire CNC Foam Cutter - Parallel Port Version - rcKeith
LowRider-inspired Foam Ripper - Things You've Made - V1 Engineering Forum