2. Unit Motion
Rotation of an arm realizes the pair-wise step motion. The moving unit releases
the connection with lower units, and is then carried to a different
position where it is reconnected.
Rigid connection
is realized by sliding cuffs so that one unit can lift another against gravity.
(See the animation of the experiment in the top page).
< Basic Unit motion. After releasing the connection to the underlying
unit, Thered unit moves to another
position on the horizontal plane when theblue unit
rotates around its vertical axis by 90 degrees. >
