I use devfoam to program the cut. As there i choose where the exact cut on the letter will be. And send it then to my controller in G code.

Basically i have an bolt on attachment to my Z that permits me to cut a whole sheet of 600x1300mm. Unfortunately Horizontally.And i have to stay there and pin the letters with needles so they dont fall and mess up. But does the job and i make money from it. Believe it or not , already an year i dont have the time to put together my big foam cutter that is supposed to use a dedicated controller for foam cutting, arduino.