Abstract: A rotary driving device includes a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member, a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof, a driver for rotating the rotary shaft about the axis thereof, a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, a pendulum loosely fitted in the mounting hole, and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the disk is rotating.

Abstract: A rotary driving device includes a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member, a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof, a driver for rotating the rotary shaft about the axis thereof, a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, a pendulum loosely fitted in the mounting hole, and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the disk is rotating.

Abstract: A rotary driving device includes a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member, a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof, a driver for rotating the rotary shaft about the axis thereof, a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, a pendulum loosely fitted in the mounting hole, and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the disk is rotating.

Abstract: A rotary driving device includes a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member, a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof, a driver for rotating the rotary shaft about the axis thereof, a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, a pendulum loosely fitted in the mounting hole, and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the disk is rotating.

Abstract: A rotary driving device includes a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member, a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof, a driver for rotating the rotary shaft about the axis thereof, a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, a pendulum loosely fitted in the mounting hole, and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the disk is rotating.

Abstract: A rotary driving device includes a rotary shaft supported rotatably about an axis thereof on a predetermined supporting member, a rotary load body mounted on the rotary shaft to project radially outward from the rotary shaft in such a manner that the rotary load body can rotate integrally with the rotary shaft about the axis thereof, a driver for rotating the rotary shaft about the axis thereof, a disk mounted on the rotary shaft coaxially therewith for integral rotation with the rotary shaft, the disk having a mounting hole formed therein, a pendulum loosely fitted in the mounting hole, and an adjustment mechanism for adjusting a relative position relationship between a central axis position of the mounting hole and a center of gravity position of the pendulum under conditions where the disk is rotating.

Abstract: An image forming apparatus includes a drive transmission system for driving a rotatable image carrier, a rotating status detecting section for detecting data relating to a rotating status of the image carrier, a rotating speed controller for controlling a rotating speed of the image carrier, and a rotation precision analyzer for calculating rotation precision information, based on the rotating status data detected by the rotating status detecting section. The rotation precision analyzer is operable to cause the rotating speed controller to change the rotating speed of the image carrier in a predetermined range, cause the rotating status detecting section to detect rotating status data in the predetermined rotating speed range, and calculate rotation precision information, based on the rotating status data in the predetermined rotating speed range.