The HP 7470 is a cheap desktop pen plaque introduced by the Hewlett Packard San Diego division in 1982. It is the first small format plot that removes paper, not pens. It uses a revolutionary "grit wheel" design that removes the paper held by the wheels with pinch grit and pinch roller.
The HP 7470 has two pens, one on either side and plotted on ANSI A (8.5 x 11 inch) or A4 paper. It's much cheaper than the previous flatbed design. It was very heavy but had 4 pens. The HP 7475 uses a rotating carousel with six pens. The plotter is used in the greeting card kiosk. This design is also enhanced for very large pen ploters. This is driven by an HP-GL plotter language that uses ASCII commands such as PA 300, 4500; PD;. The plotter has three electrical interfaces: HP-IB, RS-232, and HP-IL for HP handheld calculators.
The pen ploter becomes obsolete with the adoption of ink-jet printers, and the processor is fast enough to rasterize complex images. Houston Instruments and other manufacturers will follow with similar plotters.
Video HP 7470
References
Maps HP 7470
External links
- Manual HP 7470A Operator
- HP article about engineering 7470A
Source of the article : Wikipedia
0 Comments