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Total Variable Energization Control for Impact Printer Hammer

IP.com Disclosure Number: IPCOM000051900D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Polk, DR Rakes, JM Sweat, RH [+details]

Abstract

The present approach involves the tailoring of an impact printer hammer firing pulse to provide a total energization scheme for the impact printer hammer wherein the total energy provided by the pulse may be varied. This permits control of the whole waveform of the firing pulse during the firing cycle so as to eliminate undesirable variations due to random changes in the electrical circuit parameters. To this end, a tailored hammer firing pulse waveform generation scheme is provided which eliminates the costly generation of the waveform through the periodic accessing of a look-up table. Instead, in accordance with the present system, the desired waveform is incrementally generated using an algorithm for generating the next increment of the waveform in place of the look-up table storing the entire waveform.