Image reading apparatus, image recording apparatus and image forming apparatus

摘要

An image scanning device that can be manufactured less costly. When ADF scans an original document ( 21 ) loaded in a document hopper ( 22 ) of a document feeder unit ( 12 ), a stepper motor (M 2 ) is first driven by a motor driver ( 101 ) such that it moves a first carriage ( 50 ) from a second document scanning start position (P 3 ) to a first document scanning position (P 2 ). The first carriage ( 50 ) carries a scanner ( 14 ). After that, another stepper motor (M 1 ) is activated by the same motor driver ( 101 ) to move the original document ( 21 ) over a contact glass ( 25 ), and the original document is scanned by the scanner ( 14 ). The two stepper motors (M 1 , 2M 2 ) are selectively driven by the single motor driver ( 101 ) so that cost reduction is realized as compared with providing two motor drivers for two stepper motors.