Photoelectrically controlled line follower apparatus

Details Photoelectrically controlled line follower apparatus Photoelectrically controlled line follower apparatus

1977-07-06

1978-10-17

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

318577, G05B 100

Patent

active

041210972

ABSTRACT:
A photoelectric follower for following centers or edges of lines to control associated cutting torches produces a sharply-defined edge-of-line signal by making the `black` and `white` level signals of equal amplitude and opposite polarity. The follower has adjustable `lead` and a kerf width adjustment. Line scanning is effected by a piezoelectric rod.

REFERENCES:
patent: 3335281 (1967-08-01), Willits
patent: 3517167 (1970-06-01), Bell
patent: 3970840 (1976-07-01), De Bruine

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