Measuring and testing – Testing of apparatus
Patent
1997-10-13
1999-07-20
Williams, Hezron
Measuring and testing
Testing of apparatus
73 159, 29709, G01N 1900, G01L 2700, B23P 2100
Patent
active
059258357
ABSTRACT:
An apparatus (200) and method are provided for testing a nozzle of a pick-and-place system (100). The apparatus (200) includes a reservoir (206) configured to carry a fluid, a membrane (204) covering an opening of the reservoir (206), and a reservoir pressure sensor. The apparatus may further include a processor (118) coupled to the reservoir pressure sensor (208) and an output device (116) coupled to the processor (118). The nozzle (104) is positioned to contact and displace the membrane (204), thus changing the pressure of the fluid within the reservoir (206). The reservoir pressure sensor (208) senses pressure changes within the reservoir (206) and generates a signal that varies in response to the displacement of the membrane. The signal is compared to a predetermined signal to detect whether the nozzle has the proper position, the proper alignment, sufficient vacuum, and other errors affecting pick-and-place systems.
REFERENCES:
patent: 4112736 (1978-09-01), Wheldon et al.
patent: 4458519 (1984-07-01), Day et al.
patent: 4901431 (1990-02-01), Gast
patent: 5381962 (1995-01-01), Teague
patent: 5522267 (1996-06-01), Lewis
patent: 5553376 (1996-09-01), Solanki et al.
Kent Kevin
Solanki Ranvir Singh
Clark Richard K.
Motorola Inc.
Oskorep John J.
Soliz Chad
Williams Hezron
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