Browse Prior Art Database

Leading Edge Document Registration Control Algorithm

IP.com Disclosure Number: IPCOM000061169D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Alimpich, C: AUTHOR [+4]

Abstract

A leading edge document registration control algorithm registers different widths of documents for a document handling device wherein documents are controlled simultaneously by two servo systems with mismatched veloci and one registration sensor.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 75% of the total text.

Page 1 of 1

Leading Edge Document Registration Control Algorithm

A leading edge document registration control algorithm registers different widths of documents for a document handling device wherein documents are controlled simultaneously by two servo systems with mismatched veloci and one registration sensor.

The physical document handling system consists of two servo systems and a registration sensor. A document is controlled by the first servo system when its leading edge crosses the registration sensor, and is under the control of the second servo system when its trailing edge clears the registration sensor. Positional feedback for each of the document handling servo systems is generated by tachometer pulses. The resolution of the tachometer pulses does not have to be the same for both servo systems. However, the ratio of the resolution of the tachometer pulses needs to be a constant. The distance between the registration sensor and the desired registration point for the document's leading edge is referred to as the registration vector. The registration vector is unique for each document handling device and is represented in tachometer pulses.

The leading edge document registration control algorithm starts decrementing the registration vector (i.e., a counter) when the leading edge of the document crosses registration sensor. The registration vector is decremented by the first servo system's tachometer pulses, compensated by the ratio of the resolutions of the tachometer...