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Character Registration Controller for High Speed Bidirectional Printers

IP.com Disclosure Number: IPCOM000057639D
Original Publication Date: 1988-Jun-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Curry, SA Kightlinger, DA Kreig, ML Schuller, WM Stilz, MD [+details]

Abstract

When a character alignment problem is identified on a printed character pattern during test after assembly or during service after use, firing of a print hammer of a bidirectional printer is automatically delayed or advanced a specific time period. A printer diagnostic routine is designed to print a character pattern for identifying a character alignment problem in a bidirectional printer. This routine occurs at the time of assembly and at the time of a service call. Two DIP switches on a hammer control card are used with their states determining whether there is to be adjustment for character alignment and whether firing of the hammer is to be delayed or advanced. The hammer control card is disposed between a printer processor and a function processor. During machine Power On Reset, functional software polls the switches.