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Take the lift to proceed, where you'll find more annoying robots. Zap them to smithereens so you won't be troubled while you move crates around, which you'll need to do to proceed and to reach some chests. The chests contain some components and Uncle Art's VR disc.
Continue and you'll find the usual Camera Bots, but if you haven't noticed all they summon are Armored Sentries now, no longer normal ones. Deal with them and hit the switches. Follow the path to the tunnel to find more enemies. After defeating them, scan the Maintenance Door Generator and the Time Lab Maintenance Door.
Enter the door on the left. Keep dodging (or rolling, since that's what it looks like) to the other side of the room to avoid the lasers. Zap the Power Box at the other side and enter the door. Inside are more enemies. Destroy them, then scan the Generator Lens at the middle. Use your Charge Glove at it to power up the maintenance door. Use the transport tube in the room to return to the maintenance room. Enter the newly opened door, and keep dodging (rolling) like you did in the previous room. But this time, stay away from the Lev Turret. Charge the Power Box and enter the door.
Blast all enemies in the next room and zap the Generator Lens to open the other side of the maintenance door. Take the transport tube back and be ready for a boss battle.