Hammer Flight Time Correction
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
In a software-controlled printer that employs a solenoid as a print hammer mounted on a moving carrier and which is capable of on the fly printing, the "flight time" of the hammer becomes critical. Flight-time may be defined as the time between the current pulse to the hammer and the print petal impact on the platen, as illustrated in Fig. 1. Due to the nature of the hammer, this flight time may vary insignificantly in any single hammer for a given condition, but from one hammer to another the flight time variation may be substantial.