HP 7475A pen plotter drawing a Czech 475.1 series locomotive скачать в хорошем качестве

HP 7475A pen plotter drawing a Czech 475.1 series locomotive

Czech series 475.1 locomotive drawn by a 1980's HP 7475A pen plotter. Passenger train locomotive class 475.1 (2'D1'h2) "Slechticna" of the Czech Railways was in regular operation from 1947 until 1980. Five remain preserved in Czechnya and Slovakia. The HP 7575A pen plotter is a popular computer printing device from the 1980's for printing vector graphics. It prints by moving a pen across the surface of a piece of paper, much like a human hand does. This means it is restricted to line art. To be able to draw all sorts of shapes the pen needs to be able to move across the paper on an X and Y axis. The HP line of pen plotters have a specific design where the pen moves along one axis, and the paper moves along the other axis ('grit wheel' mechanism). The pen is mounted on a carriage that moves back and forth in a line between the grit wheels, representing the orthogonal axis. These smaller "home-use" plotters became popular for desktop business graphics and in engineering laboratories for technical drawings. Starting from the mid-1990's pen plotters were gradually replaced by high-resolution inkjet and laser printers. Surviving pen plotters have often been converted to venyl sign cutters.