Apparatus to control rotation of driven member

摘要

An apparatus to control rotation of a driven member (7), includes a rotation member (92) rotatably supported, a driving unit (8) to rotate the rotation member, a potentiometer (80) to detect an angular position of the rotation member in a detectable angle range (KH) thereof, and a control unit to control the driving unit to rotate the rotation member from a present angular position to a target angular position. The control unit controls the driving unit in a normal mode where the rotation member is rotated while confirming the present angular position of the rotation member when the rotation angle is less than 180 degrees, and controls the driving unit in a minimum mode where the rotation member is rotated from the present angular position to the target angular position via a non-detectable angle range of the potentiometer when the rotation angle is 180 degrees or more.