Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1979-02-21
1981-08-25
Truhe, J. V.
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
250561, 356400, G05B 106
Patent
active
042862019
ABSTRACT:
A system for precisely positioning a printed circuit board relative to a component insertion tool, the system including a circuit board-holding frame movable with two degrees of freedom in a plane by a servomechanism coupled to a photo detector assembly positioned on the opposite side of the printed circuit board from a light beam generator producing a single beam or a pair of parallel light beams spaced a distance equal to the distance between a pair of holes in the circuit board. Light pipes or a pair of orthogonally oriented wedge-shaped beam splitting members are positioned between the photo detector assembly and the circuit board for splitting each of the beams and thereby illuminating orthogonally oriented pairs of photo cells equally when the board is in a desired position relative to the light beams and providing to the servomechanism with an error signal to correct the position of the board when it is not in such alignment.
REFERENCES:
patent: 3893232 (1975-07-01), Fletcher et al.
patent: 3918814 (1975-11-01), Weiser
patent: 3930150 (1975-12-01), Marantette
patent: 4109158 (1978-08-01), Blitchington et al.
patent: 4151451 (1979-04-01), Maertins et al.
Carson et al., IBM Technical Disclosure Bulletin, vol. 21, No. 2, Jul. 1978 pp. 741-742.
Falkner, Journal of Physics, vol. 7, pp. 798-800, Oct. 1978.
Baker Stuart C.
Roecks Carl C.
Amistar Corporation
Holtrichter, Jr. John
Indyk Eugene S.
Truhe J. V.
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