Method and apparatus for picking and placing a surface mounted d

Details Method and apparatus for picking and placing a surface mounted d Method and apparatus for picking and placing a surface mounted d

1989-12-19

1992-10-20

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 44, 358107, G06K 900

Patent

active

051577348

ABSTRACT:
A method for accurately placing a surface mounting device (SMD) with a vacuum nozzle analyzes a video image of the SMD to locate the SMD leads and compute corrections. The positions of the lead centers are processed to determine the translation and rotation of the SMD relative to a desired location. The position of the SMD centroid is transformed from an image-referenced coordinate system to a space-referenced coordinate system. The SMD rotation relative to a desired orientation is derived from the slope of a line drawn through colinear SMD leads.

REFERENCES:
patent: 4017721 (1977-04-01), Michaud
patent: 4494139 (1985-01-01), Shima et al.
patent: 4737845 (1988-04-01), Susuki et al.
patent: 4847911 (1989-07-01), Morimoto et al.

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