It was the key.
Good luck. Don't crash the machine.
If you have ever stood in front of a Mazak ACE (whether the Smart, the 200, or the 600 model), you know the feeling. The green CRT screen glows. The joystick-style control stares back at you like the cockpit of a fighter jet. And you have absolutely no idea how to change the tool offset without crashing the turret into the chuck.