Velocity monitoring method and apparatus

Details Velocity monitoring method and apparatus Velocity monitoring method and apparatus

1988-04-21

1990-10-30

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

324175, 364565, H01J 314

Patent

active

049670751

ABSTRACT:
A velocity measuring system useful for monitoring repetitive bidirectional movements of a carrier, which supports workpieces in production, initially stores the values of a number of velocities representative of normal operation to establish a normal velocity range, and then compares the values of subsequent carrier velocities to the normal range. A continuing deviation from the normal range is indicative of defective actuator operation, allowing repair or replacement prior to hard failure and serious disruption of the production line.

REFERENCES:
patent: 3708681 (1973-01-01), Ivers
patent: 4320662 (1982-03-01), Schuab et al.
patent: 4338518 (1982-07-01), Brienza et al.
patent: 4356447 (1982-10-01), Honig et al.
patent: 4403859 (1983-09-01), Ernst
patent: 4602242 (1986-07-01), Kimura
patent: 4616131 (1986-10-01), Burkhardt

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