Patent ID: 8707627

Claim:
A method of operating a movable barrier operator, the method comprising: engaging a flexible driven member, operatively connected to a movable barrier, with a revolving drive of the movable barrier operator, the revolving drive disposed between leading and trailing portions of the driven member, the revolving drive being configured to rotate about an axis causing the leading portion of the driven member to be paid out from the axis and the trailing portion of the driven member to be pulled toward the axis as the revolving drive rotates about the axis; closing the movable barrier by moving the movable barrier laterally along a horizontal surface by moving the leading portion of the driven member away from the revolving drive while moving the trailing portion of the driven member toward the revolving drive, wherein the movement of the trailing portion of the driven member effects a horizontal force on the movable barrier to effect the movement of the movable barrier horizontally along the horizontal surface during all of the closing of the movable barrier; stopping closing the movable barrier in response to the movable barrier arriving at a stopping point, wherein the leading portion extends along a majority of a length of the movable barrier and the trailing portion extends along a portion of the length of the movable barrier, the length extending along the horizontal surface; and moving the leading portion of the driven member toward the revolving drive by rotating the revolving drive about the axis to reduce sag in the leading portion of the driven member along the majority of the length of the movable barrier without moving the moveable barrier while moving the trailing portion of the driven member away from the revolving drive without moving the movable barrier.