Component mounter

A component mounter that has a placing head having a plurality of suction nozzles, the component mounter comprising:

• a side imaging camera that is provided to be integral to a side of the placing head, that moves relatively with respect to the plurality of suction nozzles, and thereby is configured to image peripheral regions of front ends of the plurality of suction nozzles as the side imaging camera is moved relatively with respect to the plurality of suction nozzles;
• a determiner provided in the side imaging camera, wherein the determiner is a controller that determines a presence or absence of a component sucked by the front end of one of the plurality of suction nozzles, by processing image data of the side peripheral regions obtained by the side imaging camera;
• and
• a calculator provided in a main body of the component mounter positioned outside of the side imaging camera, wherein the calculator calculates the thickness of the component sucked by the front end of one of the plurality of suction nozzles, by processing the image data of the side peripheral regions obtained by the side imaging camera,
• wherein, in a case where the suction nozzle performs a suction operation of a component, and then the determiner determines that a component is absent on the front end of the suction nozzle, a vacuum valve that supplies a vacuum to the end of the suction nozzle is closed.