Patent ID: 8087659

Claim:
A conveying device comprising: a sheet-feed roller that picks up a sheet stacked at a sheet-stacking portion; a conveying roller that conveys the sheet conveyed by the sheet-feed roller; a DC motor serving as a driving source of the sheet-feed roller and the conveying roller; a motor control unit configured to generate a control signal for driving the DC motor using information obtained from at least one encoder; a driving unit configured to drive the DC motor as a result of inputting the control signal generated by the motor control unit; a determining unit configured to determine a timing in which the sheet conveyed by the sheet-feed roller reaches the conveying roller, based on a threshold value and a voltage of the control signal; and a control unit configured to, after rotation of the sheet-feed roller is started, stop the rotation of the sheet-feed roller based on the timing determined by the determining unit, and to start rotation of the conveying roller after a waiting time after the rotation of the sheet-feed roller is stopped, wherein the control unit controls an amount of conveyance of the conveying roller after the waiting time based on information about an amount of change in position during the waiting time obtained from the at least one encoder.