1. This design was also scaled up for very large pen plotters . 2. There were five typewriters for printed output, five pen plotters to produce graphs. 3. When pen plotters became widespread, a special variety of point assemblies was produced. 4. The image quality produced by electrostatic plotters is generally lower than that of pen plotters . 5. Also, conventional ball-point pens can be modified to work in most pen plotters . 6. Pen plotters print by moving a pen or other instrument across the surface of a piece of paper.7. Some Hewlett-Packard pen plotters had two-axis pen carriers and stationery paper ( plot size was limited ). 8. Pen plotters became obsolete with the adoption of ink-jet printers, and processors fast enough to rasterize complex images.9. Pen plotters have essentially become obsolete, and have been replaced by large-format inkjet printers and LED toner based printers.10. Indeed, most modern pen plotters have commands to control slewing speed, depending on the type of pen currently in use.
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