Component mounting device

A component mounting device comprising:

• a mounting head that mounts a component at a mounting position on a substrate;
• an imaging device capable of imaging the mounting position on the substrate;
• and
• a controller that determines a mounting state by comparing images of the mounting position before and after mounting of the component captured by the imaging device, wherein
• the controller is configured to determine the mounting state by comparing the images before and after mounting of the component during operation from completion of mounting of the component to completion of mounting of a subsequent component,
• the imaging device includes
• a plurality of cameras arranged one above another, or
• a single camera, a first optical system, and a second optical system, the first and second optical systems arranged one above another and dividing a field of view of the single camera,
• the imaging device is configured to be capable of capturing an image from a plurality of directions arranged one above another, and captures the image before mounting of the component when the mounting head moves down to the mounting position on the substrate before mounting the component and captures the image after mounting of the component when the mounting head moves up from the mounting position on the substrate after mounting the component, and
• the controller determines the mounting state by comparing the image before mounting and the image after mounting.