Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Escapement Control Algorithm for Printers Based on a Shaping Filter Profile

IP.com Disclosure Number: IPCOM000061800D
Original Publication Date: 1986-Sep-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Corbin, JS: AUTHOR [+2]

Abstract

A method is described which provides an algorithm for controlling the escapement mechanism of a printer. The algorithm disclosed is based on the use of a "shaping filter" to derive the algorithm profile. The shaping filter provides the unique structure to the profile necessary for compensation of unwanted escapement system dynamic characteristics. The shaping filter is developed from an approximate model of the system. The model may be as simple or as complex as is necessary to adequately describe the system's response to an input command. The model need not include all dynamic modes of the system but only those modes which significantly alter the desired input-output relationship. The model may be obtained either analytically or empirically.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Escapement Control Algorithm for Printers Based on a Shaping Filter Profile

A method is described which provides an algorithm for controlling the escapement mechanism of a printer. The algorithm disclosed is based on the use of a "shaping filter" to derive the algorithm profile. The shaping filter provides the unique structure to the profile necessary for compensation of unwanted escapement system dynamic characteristics. The shaping filter is developed from an approximate model of the system. The model may be as simple or as complex as is necessary to adequately describe the system's response to an input command. The model need not include all dynamic modes of the system but only those modes which significantly alter the desired input-output relationship. The model may be obtained either analytically or empirically. An empirical model can be developed using a number of techniques including both time response and frequency response methods. To insure accurate model characterization, the preferred approach is to use a combination of analytical and empirical analyses. For discussion purposes, the system model is specified in terms of its impulse response gm(t) in the time domain, or Gm(s) in transfer function form. Once the system model is obtained, the shaping filter profile is determined in the following manner: 1. A required response profile is specified. This profile, denoted as gr(t) (Gr(s) in transfer function form), is simply the desired or ideal impulse response of the system. Specification of the...