OFTEN the cause of alignment problem is that the paper tractors are too loose and paper moves more than it should. It takes careful adjustment of the tractors to hold paper just right when the hammers hit the characters. Too tight and the tractors tear out the edges, too loose and characters rattle around in alignment.
OTHER problems can be caused by TOO LOW humidity which causes electrostatic attraction and drag. SOMETIMES they use an ionizer bar and the high voltage power supply goes bad. Another thing is drag from the stack of paper source.
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