Precision paper registration using a stepper motor without...

Details Precision paper registration using a stepper motor without... Precision paper registration using a stepper motor without...

2005-06-28

2005-06-28

Walsh, Donald F. (Department: 3653)

Sheet feeding or delivering

Feeding

With means to align sheet

Reexamination Certificate

active

06910689

ABSTRACT:
A method and system for correcting paper registration skew. A skew or paper registration error of a sheet moving in a feed path is detected. A coarse adjustment, or copy paper registration, using full steps is performed until the registration error is reduced to a minimum value, below a full step. The frequency of one motor with respect to the other, or a reference, or reference motors, is adjusted for a fixed period to enable a fine adjustment to correct the registration error.

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patent: 6269995 (2001-08-01), Rich et al.
patent: 2002/0145249 (2002-10-01), Acquaviva et al.

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