Patent ID: 6870622

Claim:
A device for checking electric components, comprising: a pick-and-place head, travelable in a working plane and intended for handling the components, wherein a pick-up for the components is mounted in the pick-and-place head to be displaced perpendicularly in relation to the working plane via a lift drive between a transporting position and a functioning position, wherein a component is adapted to be sucked against the underside of the pick-up, raised by the pick-up from a pick-up position into the transporting position and, after the pick-and-place head travels into a placement position, lowered onto the substrate into the functioning position, the pick-and-place head including an optical scanning means for checking a component on the pick-up, and for receiving at least one scanning beam oriented transversely in relation to the lifting direction and narrow in the lifting direction, wherein, in the transporting position, the underside of the pick-up is located above the scanning beam, and control means for keeping a control check on the lifting movement of the pick-up, wherein the scanning means is coupled to the control means, the scanning means is adapted to be activated in a phase before and a phase after the suction attachment of the component, the control means is adapted to detect at least one of the presence and absence of the component on the pick-up from the scanning values of the scanning means, and the control means is adapted to assess scanning values remaining the same between the two phases as operating errors.