Rotors are marked with 2D codes right after coming out of the press, and the 2D codes are read to check the marking. Rotors are manufactured by pressing hundreds of thin steel plates to make a cylindrical product. 2D codes are printed on the side of the cylinders to manage the serial numbers of the key safety components. Because a rotor is cylindrical laminated steel, fine grooves like hairlines exist on the surface where the 2D codes are printed, which makes reading difficult.
The SR-2000 can reliably read these 2D codes thanks to its 3.5 times greater brightness and high sensitivity CMOS sensor.