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Robot-controlled Insertion of Components Into Printed Circuit Boards

IP.com Disclosure Number: IPCOM000041156D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Cooper, SA: AUTHOR [+2]

Abstract

Electrical component 1 (which may be an integrated circuit, a transistor, a capacitor or similar component) has downwardly projecting electrical leads 2 which are being inserted by a robot (not shown) through apertures 3 in a printed circuit board 4. Mounted below the lower surface of the printed circuit board 4 are proximity sensors 5 positioned to sense the position of the leads 2 projecting into or through the aperture 3. The sensors 5 are electrically coupled to adjustable control circuits and logic 6 which are connected in series to a robot controller 7.

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Robot-controlled Insertion of Components Into Printed Circuit Boards

Electrical component 1 (which may be an integrated circuit, a transistor, a capacitor or similar component) has downwardly projecting electrical leads 2 which are being inserted by a robot (not shown) through apertures 3 in a printed circuit board 4. Mounted below the lower surface of the printed circuit board 4 are proximity sensors 5 positioned to sense the position of the leads 2 projecting into or through the aperture 3. The sensors 5 are electrically coupled to adjustable control circuits and logic 6 which are connected in series to a robot controller 7. The robot controller 7 controls the robot (not shown) which is inserting the electrical component 1 so that the robot continues to apply a downward force on the component 1 until the proximity sensors 5 indicate that all the leads 2 are in the desired location with respect to the proximity sensors 5 and the apertures 3. The sensing is adjustable through the adjustable control circuits and logic 6 to position the leads 2 and the electrical component 1 in the desired location with respect to the circuit board 4 without applying unnecessary force on the component 1. Additionally, if the component is faulty (e.g., missing a lead), the present system allows scraping the part and starting again. Proximity sensor 5 may be one of several commercially available devices (such as a proximity sensor from Keyance Corporation of America) and may operate...