Method and apparatus for detecting the amount of wire remaining

Details Method and apparatus for detecting the amount of wire remaining Method and apparatus for detecting the amount of wire remaining

1994-05-31

1996-06-18

Bradley, P. Austin

Metal fusion bonding

Process

With measuring, testing, indicating, inspecting, or...

33741, 33750, 228 8, 242223, B23K 3700

Patent

active

055269753

ABSTRACT:
A method and apparatus are available for detecting the remaining amount of bonding wire on a wire spool of a wire bonder using a cam and detector switch so as to detect the number of revolutions of the wire spool which feeds out the bonding wire. A device for judging whether or not the number of revolutions detected by the detector switch has reached a preset number is linked to the detector switch. When the detected number of revolutions of the wire spool reaches the preset number, the rotation of the motor is stopped so as to stop the feed out of the wire.

REFERENCES:
patent: 1850102 (1932-03-01), Grout
patent: 2166852 (1939-07-01), Weiss
patent: 4572421 (1986-02-01), Hug et al.
patent: 5277354 (1994-01-01), Farassat

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