Optics: measuring and testing – By configuration comparison – With comparison to master – desired shape – or reference voltage
Patent
1997-01-11
1998-04-21
Font, Frank G.
Optics: measuring and testing
By configuration comparison
With comparison to master, desired shape, or reference voltage
356384, 356372, 25022714, G01B 1102
Patent
active
057423962
ABSTRACT:
A method and apparatus for detecting whether a vacuum nozzle on a high speed component placement machine is obstructed. A vacuum nozzle (10) has a hollow tube with a vacuum port (25) and an opening (12) at one end. A plastic light guide is connected to the vacuum nozzle such that one portion of the light guide is exposed to be illuminated (50) by a remote light source (30). The light guide transmits light to illuminate the opening (12) from the interior of the vacuum nozzle. The amount of light exiting the illuminated opening is measured (55) by a remotely located light detector (35). A decision (60) is made as to whether the opening is obstructed by comparing the measured illuminated opening to a predetermined standard.
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Hillman Val Jean F.
Kazem-Goudarzi Vahid
Marron Alex
Dorinski Dale W.
Font Frank G.
Motorola Inc.
Stafira Michael P.
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