[Perry] was interested in adding a 4th axis to his CNC machine, but not very excited ... it doesn’t require any additional electronics and the only software tweaks are a bit of G-code hacking.
CNC Foam Cutters are capable ... a HobbyCC FoamPro kit that came with the 4 axis stepper motor control board and 4 NEMA 23 stepper motors. GMFC software is used to both generate the g-code and ...