Image forming apparatus with accurate sheet conveyance

An image forming apparatus, including: a conveyor mechanism; a motor driver; and a controller for implementing a sheet-conveyance related control by execution of motor control processing in which a control input for a motor is calculated, wherein the controller implements the motor control processing in each sheet conveyance operation such that the control input is repeatedly calculated for conveying the sheet to a target stop position and for keeping the sheet located at the position, and wherein, in the motor control processing, the controller calculates the control input such that, after the sheet has reached the target stop position, the control input is equal to a hold control input required for keeping the sheet located at the position and such that, at a start point of the processing, the control input is not smaller than the hold control input in the processing in a previous sheet conveyance operation.