Illumination – Plural light sources – With modifier
Patent
1987-08-26
1989-04-11
Lazarus, Ira S.
Illumination
Plural light sources
With modifier
362237, 362247, 382 8, 356737, 350174, F21V 1100
Patent
active
048211575
ABSTRACT:
An automatic lead sensing and fine-forming system is disclosed for preparing the leads of electronic components so that they are ready to be inserted by robots into holes on printed circuit boards. The positions of the lead tips and the positions of the holes are sensed and compared to determine if any leads need to be bent. These leads are then bent and the force on the leads and their displacement are sensed and recorded during the process. The data recorded in then used for subsequent bendings, where necessary, for bending the leads to the target locations so that all the leads fit simultaneously into the holes. To simplify image processing, the lead tips are illuminated by light originating from substantially isotropic directions from locations substantially coplanar with the region of the lead tips. A telecentric lens system is used in the optical sensing of the position of the lead tips so that measurement of the distances between leads is unaffected by variations in the separation between the lead tips and the sensing device.
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Klass, "Circuit Board Assembly Plant to Test Systems", Aviation Week & Space Technology, 8/82, pp. 66-68.
Sanderson et al., "Sensor-Based Robotic Assembly Systems", Proceedings of the IEEE, 7/83, pp. 856-871.
Murai et al., "Automatic Insertion of Electronic Components by Optical Detection of Lead Positions", 4th Int. Conf. on Assembly Automation, pp. 390-399, date unknown.
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Chisholm et al., "Mass Pin Straightening for Circuit-Pack Backplanes", Western Electric Engineer, Fall 80, pp. 35-40.
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Birk John
Breu Heinz
Gong William
Liebes, Jr. Sidney
Morehouse Charles C.
Cole Richard R.
Hewlett-Packard Co.
Lazarus Ira S.
Wong Edward Y.
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