Computer controlled viscous fluid dispensing system

Details Computer controlled viscous fluid dispensing system Computer controlled viscous fluid dispensing system

1994-02-07

1996-04-09

Lacey, David L.

Coating apparatus

Control means responsive to a randomly occurring sensed...

118679, 118697, 118712, 118302, 118323, 348 87, 364269, 364DIG1, 382145, 222 61, 222196, 222420, 2391021, 239227, 239751, B05C 500, B05C 1100, B05B 1500, B05B 102

Patent

active

055057772

ABSTRACT:
A computer controlled system for high speed surface mount adhesive placement in circuit board production includes a dot generator supported for motion along the X, Y and Z axes. The dot generator ejects a jet of viscous adhesive that breaks away from the nozzle of the dot generator as a result of its own forward momentum. The system includes an automatic circuit board conveyor with adjustable width and pneumatically operated lift and lock mechanisms. The system runs through a self-diagnostic set-up procedure and dot calibration routine. Dot size and location are monitored through a video camera and vision circuit. A computer interfaces with the vision circuit and with motion, dot generator and conveyor controllers so that the system can operate in a high volume production assembly line. Application programs are executed by the system computer typically utilizing CAD data from a disk or a computer integrated manufacturing (CIM) controller. The system automatically assigns dot sizes to specific components based on user specifications or a component library. Dot placement paths are optimized by aligning the in-line points.

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