There is that floating Cubic Stone. You can activate it from the console.
Go find one.
Use it on the console. You can now talk to it as Tina. ?
Use the following options: 2-3
You have to find all four cogs to activate the mechanism in the Cave.
Put them into the mechanism in the Cave and activate it.
Go tell Cubic Stone. You get a password for the robot at the Clearing Access.