System and a method for mounting electronic components

Details System and a method for mounting electronic components System and a method for mounting electronic components

1996-02-20

1998-06-09

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29743, 29 7, B23P 1900, H05K 330

Patent

active

057617988

ABSTRACT:
A system and a method for mounting electronic components on a printed circuit board are disclosed. The system comprises a component supporting stage, a board bearing stage, mounting heads, vacuum bits, pressure sensors, device for computing thresholds, and device for determining the status of the pick-up operation of the vacuum bits. The method comprises the steps of detecting a first pressure value of a vacuum bit at which the vacuum bit is open and a second pressure value of the vacuum bit at which the vacuum bit is closed, computing a threshold value in response to the detected first and second pressure values, and moving the mounting heads to the board bearing stage in response to a determination that the pressure value of the vacuum bit at which the component is picked up exceeds the threshold values.

REFERENCES:
patent: 4683654 (1987-08-01), Scholten et al.
patent: 5029383 (1991-07-01), Snyder et al.
patent: 5475619 (1995-12-01), Sugano et al.
patent: 5498942 (1996-03-01), Ijuin

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