Movement error detection apparatus of mounting head, and component mounting apparatus

A movement error detection apparatus of a mounting head to be applied to a component mounting apparatus equipped with a substrate conveyance device including a fixed conveyor extending in a first direction and a movable conveyor which is movable in a second direction orthogonal to the first direction with respect to the fixed conveyor, and equipped with a mounting head to mount a component on a substrate conveyed by the substrate conveyance device to a predetermined work position, the movement error detection apparatus of a mounting head comprising:

• a plurality of marks including a movable region inside mark arranged in a movable region of the movable conveyor and a movable region outside mark arranged outside the movable region of the movable conveyor;
• an imager to move together with the mounting head to image the plurality of marks;
• and
• an auxiliary device to assist an imaging, wherein
• the movable region outside mark is arranged on a horizontal reference plane including an upper face of the substrate arranged at the work position,
• the movable region inside mark is arranged at a position which is lower than the horizontal reference plane and at which the movable conveyor is not interfered, and
• the auxiliary device absorbs a height difference between the movable region inside mark and the horizontal reference plane to assist the imager in picking up a focused image of the movable region inside mark.