The
HP 7470 was a small low-cost desktop pen
plotterA plotter is a vector graphics printing device to print graphical plots, that connects to a computer. There are two types of main plotters. Those are pen plotters and electrostatic plotters.- Overview :...
introduced by Hewlett Packard's San Diego division. It used a revolutionary "grit wheel" design which moved the paper held in place by a wheel with embedded grit and a pinch roller. The HP 7470 had only two pens, one on either side. It was much less expensive than the previous flatbed design, which was very heavy but had 4 pens. The HP 7475 used a rotating carousel with six pens.
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The
HP 7470 was a small low-cost desktop pen
plotterA plotter is a vector graphics printing device to print graphical plots, that connects to a computer. There are two types of main plotters. Those are pen plotters and electrostatic plotters.- Overview :...
introduced by Hewlett Packard's San Diego division. It used a revolutionary "grit wheel" design which moved the paper held in place by a wheel with embedded grit and a pinch roller. The HP 7470 had only two pens, one on either side. It was much less expensive than the previous flatbed design, which was very heavy but had 4 pens. The HP 7475 used a rotating carousel with six pens. That plotter was used in greeting card kiosks. This design was also scaled up for very large pen plotters. These were driven by the HP-GL plotter language which used
ASCIIThe American Standard Code for Information Interchange is a character-encoding scheme based on the ordering of the English alphabet. ASCII codes represent text in computers, communications equipment, and other devices that use text...
commands such as PA 300, 4500;PD;
Pen plotters became obsolete with the adoption of ink-jet printers, and processors fast enough to
rasterRasterization or Rasterisation is the task of taking an image described in a vector graphics format and converting it into a raster image for output on a video display or printer, or for storage in a bitmap file format....
ize complex images.
Houston InstrumentsHouston Instruments was a manufacturer of pen plotters. They used the DMPL plotting control language. They competed with Hewlett Packard plotters such as the HP 7470....
and other manufacturers would follow with similar plotters.