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Mars 2020 Rover
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Modeled after NASA's Mars 2020 Mission Perseverance Rover, this design features two different versions that show two different ways of driving with six wheels while steering with four wheels.

Both versions also feature spring (rubber) suspension to improve traction over bumps, a folding extendable arm with the color sensor at the end, and the distance sensor mounted on top of the mast.

 
 

Searching for life...

 


4-Wheel Steering Version

The 4-Wheel Steering version has two drive wheels at the center of each side and four steering wheels at the corners. It steers by angling the rear wheels in the opposite direction of the front wheels and reducing the speed of the inside drive wheel. The special "Ackerman steering" geometry helps all of the wheels align to the same turning center.


Zero Turn Version

The Zero Turn version also has two drive wheels at the center of each side and four steering wheels at the corners. However, it steers by angling all four of the corner wheels inward ("pigeon toed"), so that the turning center is at the very center of the robot, and running the two drive wheels in opposite directions. This allows the rover to pivot in-place to maneuver in very tight spots.

 

   

 

Building Instructions

 

 

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