The user can create the movable roller group as follows.
•Fixed Roller Group, Direction, Radius
•Fixed Roller Group: Selects a fixed roller group.
•Direction: Defines the position of the movable roller group with respect to the fixed roller group.
•Radius: Defines a radius of the movable roller group.
•Fixed Roller Group, Direction, Radius, Distance
•Fixed Roller Group: Selects a fixed roller group.
•Direction: Defines the position of the movable roller group with respect to the fixed roller group.
•Radius: Defines a radius of the movable roller group.
•Distance: Defines an initial gap between the fixed roller group and the movable roller group.
Figure 1 Initial gap of Movable Roller