After getting to the ledge where the control box is located and using the Robotron Control Unit, the 2 minute cooldown for the unit activates without spawning a robot to sample the moonwell. Nothing happens. Cannot complete the quest as it stands.
Confirmed, and I have something to add: When you use the Robotron Control Unit, you begin casting a spell "Summon Robot" that has a 15-minute cast time.. This is supposed to be the duration of how long you can control the robot, not the cast time for the spell.