Method and apparatus for perforating a printed circuit board

Details Method and apparatus for perforating a printed circuit board Method and apparatus for perforating a printed circuit board

1991-03-26

1993-08-03

Smith, Jerry

Boots, shoes, and leggings

36447435, 36416701, 356375, 356390, 356401, 358101, G06F 1546, B26D 530

Patent

active

052335364

ABSTRACT:
A method for perforating a printed circuit board on two perforating position identifying patterns using two perforating devices which have respective coordinate systems, wherein the two patterns are imaged by TV cameras. The pattern positions are detected by an image processing device with image signals. An inter-pattern spacing is calculated based on the detected values of the pattern positions, using an arithmetic circuit. An error between an inter-perforating-hole spacing and an inter-pattern spacing is calculated. Perforating positions are calculated from the patterns by the arithmetic circuit. A perforating control circuit controls the two perforating members to perforate at the printed circuit board at the same time.

REFERENCES:
patent: 4481533 (1984-11-01), Alzmann et al.
patent: 4568971 (1986-02-01), Alzmann et al.
patent: 4641828 (1987-02-01), Yajima
patent: 4817477 (1989-04-01), Emery et al.
patent: 4829375 (1989-05-01), Alzmann et al.
patent: 4866629 (1989-09-01), Chen et al.

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