The present invention relates to a method of printing polymer films and corresponding articles. The apparatus includes an initiator arranged on a nonmetallic mudguard of the vehicle. An LED control section controls an amount of an output current of an LED power source on the basis of the LED data, and includes a protection function of limiting the amount of the output current so that the amount of the output current does not exceed a predetermined upper limit. Because the plurality of cyclones separates dust utilizing a compact structure, suction force deterioration is prevented and dust-collecting efficiency is increased.