https://books.google.com/books?id=Ws228Aht0bcC&printsec=frontcover&dq=open+source+cnc+torch+table&hl=en&sa=X&ved=0ahUKEwjMw5HbhMnJAhXJj4MKHU6qAUQQ6AEIVjAI#v=onepage&q&f=true