| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent wrong feedback control from being executed, when there is failure a feedback control mechanism, in a rotor controller for feedback-controlling a rotor. <P>SOLUTION: A DC control circuit 120 for controlling the conveying speed of an intermediate transfer belt 162 by the feedback-control has a signal-generating IC 123 for receiving a feedback signal Fb and for generating a control signal Ctr for controlling the rotation of the intermediate transfer belt 162, and a main IC 121 for switching existence to non-existence of reference to the feedback signal Fb by the signal generating IC 123; the signal-generating IC 123 generates the control signal Ctr to make a state of the signal brought into a predetermined target state, when the feedback signal Fb is to be referred to, and the main IC 121 conducts switching between the existence and the non-existence of reference to the feedback signal Fb, in response to the state of the feedback signal. <P>COPYRIGHT: (C)2009,JPO&INPIT |
