Browse Prior Art Database

Method for Calculating Realtime Escapement Velocity for Printers

IP.com Disclosure Number: IPCOM000060876D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Albaugh, VA Peterson, MJ [+details]

Abstract

A method is described for calculating in realtime the velocity of the print head carrier of a printer to obtain optimum carrier velocity. When printing on the fly, that is not stopping the escapement mechanism at each print position, all subsystems of the printer must be synchronized. For a daisywheel-type printer, this means that the carrier cannot pass over the print point until wheel and ribbon advancement have completed. It also means that the hammer must be actuated prior to the print point to account for its flight time such that impact is synchronized with the carrier passing over the print point. The time taken for escapement to traverse between print points must allow for completion of tasks for the other subsystems. Between impacts, the following tasks must occur: The hammer must recover to the starting point.