Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1997-11-25
2000-09-12
Ballato, Josie
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324761, G01R 104
Patent
active
061182923
ABSTRACT:
A method for correcting misalignment between test needles and test points during multiple electrical tests on printed circuit boards, in which setting up the machine to carry out the test on a circuit board or group of circuit boards, and hence correction of any misalignment, takes place without removing the circuit boards from the test area. The invention also relates to a device for correction of misalignment, that uses one or more mobile plates (80, 110), depending upon whether the test is performed on only one side or on both sides of the printed circuit board, both mobile plates being disposed on the same interface (1) of the test machine and operating respectively on centering pins (50) of the printed circuit board (10) and on centering pins (50') carried by a mobile structure of the other interface (1') of the test machine, the mobile plates (80, 110) being moved by at least three respective linear actuators (90, 130) acting on respective outer edges of the plates, to give them a rotational translational motion.
REFERENCES:
patent: 4774462 (1988-09-01), Black
patent: 4812754 (1989-03-01), Tracy et al.
patent: 4818933 (1989-04-01), Kerschner et al.
patent: 4829241 (1989-05-01), Maelzer
patent: 5523698 (1996-06-01), Antonello et al.
patent: 5572144 (1996-11-01), Davidson et al.
patent: 5614819 (1997-03-01), Nucci
Patent Abstract of Japan, vol. 016, No. 211, May 19, 1992 and Japanese Patent 4-38480, Feb. 7, 1992.
Antonello Gianpaolo
Bagioni Graziano
Giani Alberto
Ballato Josie
Circuit Line SPA
Tang Minh
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