This is a sign that I helped design at Logan Steel. This was done on the Voortman, that Logan Steel recently bought. The machine allows to easily cut any letters, and pretty much anything you can draw onto the beams, channels, or any other structural material that the Voortman accepts.
Link to Blog, explaining some of the fabrication process: https://raihanfabricates.com/ball-and-socket-fabrication-diagram/
Example Ball and Socket Diagram Model: https://raihanfabricates.com/inventor/