Component mounting apparatus and component detection method

摘要

A transfer pathway of a mounting head 10 in a component-mounting round during which the mounting head 10 moves back and forth between a component feeding unit 4 and a substrate conveyance mechanism 2 is derived by a transfer pathway calculation unit 25 for each component-mounting round from mounting program data 21a. A focusing processing unit 24 controls an optical system focusing mechanism 18, thereby matching a focusing point of a line sensor camera 14 achieved during imaging operation to the transfer pathway of the mounting head 10 based on data pertaining to the derived transfer pathway. Further, an optical system zooming mechanism 17 adjusts an imaging range according to the focusing point. Accordingly, even when a long substrate 3 is taken as an object, it is possible to detect with high precision whether or not a component exists on the pickup nozzle 11 of the mounting head 10.

主权项

1. A component mounting apparatus that picks up a component from a component feeding unit by a mounting head, transferring and mounting the component on a substrate, the apparatus comprising:
a substrate conveyance mechanism that conveys the substrate in a first direction, positioning and retaining the substrate at a component mounting operation position and a head transfer mechanism that transfers the mounting head in the first direction and a second direction orthogonal to the first direction by a first transfer mechanism and a second transfer mechanism, thereby moving the mounting head between the substrate conveyance mechanism and the component feeding unit disposed beside the substrate conveyance mechanism in the second direction thereof; an imaging unit that includes a light projection unit projecting a belt-like inspection beam and a line sensor camera which receives the inspection beam and which outputs the beam as image data representing a state of a lower end of a pickup nozzle attached to the mounting head and that are configured such that the light projection unit and the line sensor camera are placed opposite to each other with a transfer pathway of the mounting head interposed therebetween and outside a transfer stroke of the mounting head in the first direction thereof; a focusing processing unit that controls an optical system whose focusing point is variably set on the line sensor camera, thereby adjusting the focusing point of the line sensor camera to a desired position during imaging operation; a transfer pathway calculation unit that derives, in each of component-mounting rounds, from mounting program data targeted for the substrate the transfer pathway of the mounting head in a component-mounting round during which the mounting head is moved back and forth between the component feeding unit and the substrate conveyance mechanism; an imaging control unit that controls the focusing processing unit on the basis of data pertaining to the derived transfer pathway, thereby matching the focusing point of the line sensor camera to the transfer pathway of the mounting head in each of component-mounting round; and a determination processing unit that determines from the image data whether or not a component exists on the lower end of the pickup nozzle.