Patent ID: 7248276

Claim:
An image-forming device comprising: a first motor that rotates a polygon mirror, the first motor being able to drive at up to a first maximum permissible current of A 1 ; a second motor that drives a driven member different from the polygon mirror, the second motor being able to drive at up to a second maximum permissible current of B 1 ; a power supply that supplies up to a maximum permissible supply current of D to the first and second motors; and a current controller that controls operations of the first and second motors; wherein the maximum permissible supply current of D is set to be less than a sum of the first maximum permissible current A 1 and the second maximum permissible current B 1 , and the current controller controls a first current A 2 to be supplied to the first motor and a second current B 2 to be supplied to the second motor so that a sum of the first and second current A 2 and B 2 is less than D, and the current controller controls the second current B 2 to be less than the second maximum permissible current B 1 .