Method of detecting floated lead of electrical component

Details Method of detecting floated lead of electrical component Method of detecting floated lead of electrical component

1991-05-06

1992-12-01

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

358101, 358106, 358107, 382 8, G06K 900

Patent

active

051682176

ABSTRACT:
The present invention provides a method of detecting a floated lead of an electrical component which involves the steps of positioning an electrical component above a laser device on the way of feeding the electrical component to a substrate by sucking the electrical component to a nozzle of a pick and place head; radiating a laser light from a laser device toward the leads of the electrical component thereby to detect the heights of three points of the leads; and then calculating a virtual plane including the three points of the leads to obtain a height difference of the respective leads with respect to the virtual plane.

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patent: 4405233 (1983-09-01), Grau
patent: 4472056 (1984-09-01), Nakagawa et al.
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patent: 4800335 (1989-01-01), Davila et al.
patent: 4806776 (1989-02-01), Kley
patent: 5047714 (1991-09-01), Maeno

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