A stacked three head finishing apparatus is provided. The apparatus
includes a base mountable to a floor, a first head mounted to the base, a
second head mounted to the base above the first head, and a third head
mounted to the base above the second head. Each of the first, second, and
third heads includes a rotatable wheel. A motor imparts rotation to the
wheel which may then be used for finishing operations. The height of each
head above the floor and the position relative to one another is
pre-selected to ensure that all of the heads are within reach of a robot
arm and to ensure that nothing will interfere with the movement of the
robot arm.