This is a robotic remotely controller camera crane I am working on to take smooth dolly shots on site. Once completed the robot will be programmed with certain movements that can be played back to get a sequence of video shots. Its built on an old wheel chair platform that had the motor controler replaced with one that can be programmed. The arm is made of 6061 aluminum cut on a Shopbot Buddy with a spindle. I use a misting system which sprays a very very fine mist on the tool to keep it cool and lubricate it so aluminum chips don't stick. The mist is fine enough that it evaporates and doesn't pool.
The crane will lift a 30lb camera if needed.