Tilt compensated error correcting system

Details Tilt compensated error correcting system Tilt compensated error correcting system

1993-02-16

1994-10-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356400, G01N 2186

Patent

active

053549929

ABSTRACT:
A system for creating a position correcting error signal indicative of the lateral displacement of the center of a strip from a control position for the center of a nearly flat strip having a width and first and second generally parallel edges, as the generally flat strip moves along a given feed line past a given location, where the error signal creating device including means for detecting the orthogonally projectable, one dimensional lateral position of the first edge of said moving strip at said given location, means for detecting the orthogonally projectable, one dimensional lateral position of the second edge of said moving strip at said given location. The system includes transducer means for detecting the lateral tilt angle of the strip at said given location, means for creating an electrical value based upon said detected tilt angle, means for creating edge signals indicative of the detected lateral positions of the edges of the web, and means responsive to the edge signals and the electric value for providing a tilt responsive error signal for reducing said lateral displacement of the web center from said central position for the web center.

REFERENCES:
patent: 2566399 (1951-09-01), Bishop
patent: 4291825 (1981-09-01), Glanz
patent: 5058793 (1991-10-01), Neville et al.
patent: 5191280 (1993-03-01), Van derWerf et al.

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