OK, Witchen, I've figured out how to "herd" the security droids and have explored around in all the accessible shafts. Found a 'bot with a loose hand and used it to get back to the room where I started the game. No big deal there, so I'm back in the control room again.
I must have missed a clue somewhere, because I have no idea what I am supposed to be doing next. No other grates can be unscrewed with the 'bot hand. Can't get past the broken 'bot. Access is denied to the area where the working 'bot is wandering around, although I can "scan" him on the control panel.
How about e a teensy hint?
When the only tool you have is a hammer, every problem begins to resemble a nail.