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The standard design shown above includes
a smooth fixed balance wheel in the back, which allows
the large front wheels to both drive and turn the robot
easily.
Instructions are also provided for an
alternative rear balance wheel which is a spinning
castor wheel. This kind of balance wheel can provide
less turning resistance in some cases (such as spinning
tight turns on carpet), but, like the front wheels on a
shopping cart, it affects the driving of the robot in
other ways and can make maneuvering not as precise.
Give both a try and see which you like
better! |
