Print hammer control

Details Print hammer control Print hammer control

B - Operations, Transporting

41

J

197/78

B41J 1/26 (2006.01) B41J 1/24 (2006.01) G06K 15/08 (2006.01)

Patent

CA 1128448

PRINT HAMMER CONTROL Abstract of the Disclosure A method of, and a system for, controlling a constant current hammer in a carrier type daisy wheel printer. A logic table is utilized and first addressed with a carrier velocity code corresponding to character selec- tion time. The table output is a sync point for deter- mining hammer turn on time. The table is next addressed with a combination code made up of the velocity code and a code corresponding to the desired impact force. The table output this time is the actual turn on time for the hammer from the sync point. The on time of the hammer is then controlled by the desired impact force code exclu- sive of the table. This code is also utilized to control the beginning of selection for the next character. AT9-78-024

339731

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