Printer Head Positioning
The printer head is attached to a metal bar that ensures correct alignment, but horizontal positioning is controlled by a rubber band that attaches to sprockets on two wheels at each side which is then driven with an electric motor. Actual position can be found out either be dead count using a stepper motor, rotary encoder attached to one wheel or a transparent plastic band with markings that is read by an optical sensor on the printer head (common on inkjets).
Read more about this topic: Dot Matrix Printing
Famous quotes containing the words printer, head and/or positioning:
“Now William pulled the lever down,
And click-clack went the printing-press.
William was the only printer in town
Who had peeped while the angels undress.”
—Allen Tate (1899–1979)
“It is better to be the head of the chicken than the tail of an ox.”
—Chinese proverb.
“Genius differs from talent not by the amount of original thoughts, but by making the latter fertile and by positioning them properly, in other words, by integrating everything into a whole, whereas talent produces only fragments, no matter how beautiful.”
—Franz Grillparzer (1791–1872)