Monitoring bi-directional motor drive failure in...

Details Monitoring bi-directional motor drive failure in... Monitoring bi-directional motor drive failure in...

2005-08-16

2005-08-16

Frech, Karl D. (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S454000, C235S462300, C235S474000, C235S476000, C235S435000

Reexamination Certificate

active

06929184

ABSTRACT:
Malfunction of a bi-directional resonant motor drive in an electro-optical reader is detected without new hardware by monitoring the frequency of a start-of-scan signal, and by determining whether the monitored frequency lies within a predetermined frequency range.

REFERENCES:
patent: 3739154 (1973-06-01), Corcoran
patent: 5367151 (1994-11-01), Dvorkis et al.
patent: 2002/0162888 (2002-11-01), Wood
patent: 2002/0170968 (2002-11-01), Blake et al.
patent: 2003/0010826 (2003-01-01), Dvorkis et al.
patent: 2003/0019937 (2003-01-01), Colley et al.
patent: 2004/0050937 (2004-03-01), Barkan

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