January 2009

I was inspired by a number of cube-shaped robots on NXTlog to build a similar vehicle. Presenting Que-boid!

Que-boid can drive on four faces thanks to the track design.

The design for the track supports is taken from the LEGO 8294 Excavator; I used four excavator track supports attached by beams to build the model structure. I am very pleased with how reusable the LEGO 8294 design is. Why re-invent the wheel when you can build on the work of giants?

The battery pack is mounted on a fold-out frame on the side of the rover. Two medium Power Function motors have plenty of torque to drive the rover - it is surprising lightweight and sturdy. The LEGO NXT controls the motors via the Mindsensors NRLink interface. For simplicity I do not have any cables attached in the pictures shown below.


Last updated 4 February, 2009

All content © 2008, 2009 Mark Crosbie  mark@mastincrosbie.com

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In this video I test drive the robot around the kitchen floor; the NXT is not yet controlling the PF motors. I’m using the LEGO PF remote control.

Building Instructions

  1. View step-by-step Que-boid.pdf as a PDF file (3.5 MB download)

  2. View a gallery of images with step-by-step instructions.

  3. Download the Que-boid.ldr file to view in LDView or MLCad.