Universal Laser Systems Laser Platform M-300 Guía para resolver problemas descargar pdf (Pagina 33)

Computerized Controls 4-7

Graphics

The selections in this tab are used when printing grayscale images such as JPG, TIF, BMP, and

GIF formatted images. DO NOT print color bitmapped images to the laser system. First convert

the color image to grayscale in your bitmap editing software. Some color images are very

complex and can be very large in file size. This can cause some problems with some

computers causing them to crash or print erroneously, therefore we recommend using only

black and white or grayscale images. Since the laser system is truly a black and white printer,

grayscale images MUST first be converted into a 1-bit black and White, dithered (dotted) image

either by your bitmap editing software or by the Printer Driver before they can be laser

engraved. This process is very similar to how newspaper photographs as well as laser printer

photographs are printed. For a more detailed explanation of the term “grayscale”, “bitmap”,

“halftone”, or “dither”, please refer to the Special Applications Guide.

If you choose to covert your image in your bitmap editing software, choose “No Halftoning” in

the Printer Driver. If you would like the Printer Driver to convert the image for you, choose one

of the three dithering patterns, “Halftone (fine)”, “Halftone (coarse)”, or “Error Diffusion”.

No Halftoning

If the image is a grayscale bitmap and you select this option, the Printer Driver will NOT convert

the image into a halftone or diffusion dither pattern. Since the laser system cannot print

grayscale images directly, it will engrave the image as a 50% threshold. This means that each

pixel that is lighter than 50% black will be converted into white and each pixel that is darker than

50% black will be converted into black. This effect is very similar to trying to duplicate a

photograph using a photocopier.

Halftone screens can be defined as the number of printer dots or halftone cells per inch used to

print grayscale images. Varying their size and density creates the illusion of variations of gray.

Also known as screen ruling or line screen, screen frequency is measured in lines per inch

(lpi)—or lines of cells per inch in a halftone screen. For more information on Halftone screens,

consult your bitmap editing software.

Halftone (fine)

By choosing this selection, the Printer Driver converts the grayscale bitmap into a halftoned,

black and white bitmap that is based on the resolution you have chosen.

RESOLUTION ANGLE SHAPE LINES PER INCH

1000 45 DEGREES ROUND 180

500 45 DEGREES ROUND 90

333 45 DEGREES ROUND 60

250 45 DEGREES ROUND 45

200 45 DEGREES ROUND 36

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 99 100

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Universal Laser Systems Laser Platform M-300 Guía para resolver problemas Pagina 33