Method and device for monitoring electric components in a pick-and-place device for substrates
First Claim
1. 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.
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Accused Products
Abstract
A method and device are for monitoring electric components in a pick-and-place device for substrates. The underside of a pick-up is monitored by an optical scanner during the pick-up phase and during the placing phase of a component. A lift drive for the pick-up is provided with a position sensor that is linked with a control device. The scanner emits and receives a scanning beam oriented transversally to the direction of lift and is likewise coupled with the control device, thereby allowing monitoring of the underside of the pick-up in a direct time-related manner with the picking and placing of the component. The various lift positions are saved and compared when a threshold value of the received scanning beam is exceeded so that the inventive device also allows for a monitoring of the height of the component.
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Citations
29 Claims
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1. A device for checking electric components, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pick-and-place head for checking a component, comprising:
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an optical scanning means for receiving at least one scanning beam oriented transversely in relation to a direction of lifting the component and narrow in the lifting direction, wherein, in a transporting position, an underside of a pick-up device is located above the scanning beam, and control means for keeping a control check on the lifting movement of the pick-up device, 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 suction attachment of the component, the control means is adapted to detect at least one of the presence and absence of the component when picked-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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25)
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20. A pick-and-place head for checking a component, comprising:
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an optical scanner, adapted to receive at least one scanning beam oriented transversely in relation to a direction of lifting the component and narrow in the lifting direction, wherein, in a transporting position, an underside of a pick-up device is located above the scanning beam, and a controller, adapted to keep a control check on the lifting movement of the pick-up device, wherein the scanner is coupled to the controller, the scanner is adapted to be activated in a phase before and a phase after suction attachment of the component, the controller is adapted to detect at least one of the presence and absence of the component when picked-up from the scanning values of the scanner, and the controller is adapted to assess scanning values remaining the same between the two phases as operating errors. - View Dependent Claims (26, 27, 28, 29)
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Specification