Input: violet slider moving along a stationary runway thanks to grey cylinder.
Ouput: pink slider moving along a green rotary runway.
Axis of the cable vertical portion and axis of revolution joint of the movable runway are coaxial.
The cable twist does not affect motion transmission which can be performed even during the green runway rotation.
Rotation of the green runway is controlled by a motor (not shown) through the green gear.
The mechanism can be used for controlling planar motion of a point that belongs to the pink slider based on the polar coordination system..