Apparatus for detecting positioning error of a component with respect to a suction nozzle

An apparatus for detecting a positioning error of an electric component with respect to a suction nozzle by which the electric component is held by suction under a negative pressure, comprising:

• an image-taking device operable to take an image of said suction nozzle in a direction of extension of a centerline of said suction nozzle;
• at least one dog, disposed at a position at which an image of said at least one dog can be taken together with the image of said suction nozzle by said image-taking device;
• and
• a control device including an image-taking control device electrically connected to said image-taking device, and a data processing device electrically connected to said image-taking control device,
• wherein said image-taking control device is operable to operate said image-taking device to concurrently take said images of said suction nozzle and said at least one dog, and to concurrently take an image of said electric component as held by said suction nozzle and said image of said at least one dog, and
• said data processing device being operable to obtain a relative position between said suction nozzle and said at least one dog, on the basis of said images of said suction nozzle and said at least one dog which have been concurrently taken, and obtaining said positioning error of said electric component with respect to said suction nozzle, on the basis of said images of said electric component and said at least one dog which have been concurrently taken, and said relative position between said suction nozzle and said at least one dog.