Used Large Format Printers
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Large Format Printer Article:
Wider Gets Better
by Alan Joch
July, 2004
Inkjet Innovations
The color push is being advanced by increasingly sophisticated and economical rendering and visualization software applications that let engineers create detailed models and color representations, which take ideas from the original concept and initial design to a 3D color rendering and final schematics. That’s the word from Sandy Gramley, DesignJet product manager for Hewlett-Packard of Palo Alto, California. "Wide-format printers are moving to handle the entire process. Engineers don’t just print line drawings anymore, they also need photo-quality printing," she says.
"3D design software has made huge progress in image quality," he says, "and large-format printers must be able to reproduce all the subtle gradations in colors. If you’re doing CAD drawings, there is only a certain amount of colors you’ll need, but when you’re producing a 3D rendering, it gets down to how photorealistic can you make this drawing. If you show the customer what the final product will look like, it’s a real selling point."
Color isn’t the only concern for engineers. Of equal importance is the precision with which shapes are reproduced. To meet these output-quality demands, some wide printers now support resolutions of 600 to 1200 dpi (dots per inch).
Because wide-format printers must meet the demands of deadline-driven engineering departments, speed is a third factor that distinguishes individual devices. Supporting bidirectional printing and cramming print heads with thousands of ink nozzles are two ways printer manufacturers are boosting the speed of inkjet printers. For example, Canon USA now ships one-inch print heads that contain more than 7,500 nozzles. They can produce a large-format image at 600 dpi 3 1200 dpi in about 4.5 minutes, says Amit Bagchi, director of Canon’s Graphic Arts Division. Sharper, 1200 3 1200 dpi prints take about seven minutes, he adds.
How to Choose
Because the choices for wide-format printing are so diverse, engineers looking for the right model must first prioritize their needs. Is fast, monochrome printing of schematics and CAD drawings the greatest need? Then look for a high-speed, high-resolution laser or LED printer. Or if speed takes a back seat to high-quality, full-color prints of photorealistic renderings, then one of the new wide-format inkjet models should be the top choice.
Another consideration is whether the printer will serve a single engineer, a small workgroup, or provide a central resource across a network. For network printers, look for devices with an internal hard drive, a built-in network interface, and large ink and paper capacities.
Future Flexibility
The good news is that no matter how faithfully today’s wide-format printers reproduce the colors, tones, shapes, and text that constitute the range of engineering output today, innovations are coming to make tomorrow’s models even better. Vendors say they’re paying special attention to the controllers that manage the speed and accuracy of their printers.
"Future products will be more flexible," reports Jacob Berenfeld, application engineer with Western Graphtec . "People will be able to easily choose whether to emphasize color accuracy and trade off speed, or vice versa, for each individual print."
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