Patent ID: 7362071
Filing Date: 2008-04-22
Classification: E02F

Abstract:
1. A rotation control device that controls rotation of a rotary body driven by an electric motor based on a command from an operating section, the device comprising: a rotation position output means which outputs rotation position information of the rotary body; a reference position storage means which stores an output value of the rotation position output means as a reference position; a control command generating means which generates and outputs a control command for the electric motor; a control-system change judging means which judges whether or not to change a control system of the rotation control device based on the output value of the rotation position output means, the reference position stored in the reference position storage means and an operated direction of the operating section; and a control-system changing means which changes the control system of the rotation control device in accordance with the judgment result of the control-system change judging means, wherein the control-system changing means changes the control system so as to increase the control command for the electric motor to be a larger value than that before the change of the control system.