Some of you may be aware of UniBot 2 from the discussion on the forums, or from my site.

UniBot 2 can be used as a base unit for more complicated robots. The interesting thing about this robot is that it only uses one motor but can still turn by using a ‘floating worm’. This effectively ‘frees-up’ a motor from turning duties, leaving you with two motors for more functionality from the rest of your robot.

Following comments on the original design, this second version of UniBot features more attachment points for a mechanism on top, a better ball-castor arrangement, and a more robust construction. Also, the design now only uses pieces in the NXT retail set, so hopefully it will help users with only one set (like me) build some more complicated robots.

I’d be interested to hear if anyone uses the LDD file to build UniBot, and what contraptions people might put on top of it that use that ‘extra’ motor.

Tip ‘o the hat to 222doc, whose excellent description of a ‘floating worm’ arrangement in the forums prompted me to start building UniBot.

The LDD file for UniBot 2 can be found here.