Ecrm Incorporated

Ecrm Trust

John L Connolly, Iii

John W Berrigan

Michael C Zembko

Donald E Troxel

James A Carl

M Joseph Niland

David J Connor

W Thomas Boston

Embodiments of the invention provide systems and methods for correcting scan position errors in an imaging system. In one embodiment of the present invention, the method includes determining an image beam velocity error as a function of a position within a scan line of an image, and using the image beam velocity error to determine a plurality of pixel clock frequencies to be respectively applied to a plurality of positions within the scan line.

System and method for correcting scan position errors in an imaging system

A platesetting system and method comprising a pair of dual capstan rollers that receives a recording medium and records an image on the received medium as the medium is transported through the system. The system and method advantageously enable at least a portion of the image to extend from a leading edge of the medium to a trailing edge of the medium.

System and method for sheet transporting using dual capstan rollers

A method and apparatus for accurately controlling a hysteresis synchronous motor velocity eliminate low frequency hunting, which is characteristic of the motor. A nominal input phase current is modified by providing feedback information, thereby enabling a microprocessor control system to modify the phase of quadrature input current signal to the motor and thereby eliminating hunting of the motor. Accordingly, in a high resolution scanning application, speed variations which could cause disturbing artifacts to appear in an output image are eliminated. Velocity control, better than 15 parts per million, can be achieved

Method and apparatus for correcting hysteresis synchronous motor hunting

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Newton, NH, United States of America

John L Connolly, Iii