Method and device for positioning of moving machinery parts

Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet

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25055932, 356375, G01N 2186

Patent

active

057341737

ABSTRACT:
A method and device for positioning moving machine parts by using two sensors to detect the spacing of code markers on a code bearing part attached to the machine part and counting the number of code markers detected while accounting for uneven spacing between code markers which invariably occur when two code bearing parts are joined for use on a single machine part.

REFERENCES:
patent: 4276480 (1981-06-01), Watson
patent: 5070238 (1991-12-01), Ishihara et al.

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