According to the present invention, when a component mounting machine 10 mounts a component P on a board B, image data Dp, which is acquired by imaging the component P by means of component recognition (step S102), is stored in a storage unit 92 (step S103), and a brightness-related condition is optimized on the basis of the image data Dp (steps S201, S301-S311). Accordingly, it becomes possible to acquire a suitable brightness-related condition according to the component P which is the component to be actually mounted.
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