This belong in the PRINTERS section!
Duplicated characters have nothing to do with the heads. You wasted ink for nothing.
Duplicated characters are sometimes caused by a printer set to comunicate with the computer in full duplex or even in half-duplex mode. Set it as NON-duplex.
Another cause is the computer or the printer set to ECHO the transmission. Disable any echo setting.
Electro
November 2012
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