Universal Laser Systems VLS3.50 Guide de l'utilisateur télécharger pdf (Page 36)

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User Guide

User Manual

Black and White Mode

The Black and White mode thresholds the image at 50% black. Each pixel that is greater than 50% black

will be converted into white and each pixel that is 50% black or less will be converted into black. This

eect is very similar to trying to duplicate a photograph using a photocopier.

UniversalLaser Systems, Inc.

Helpful Tip

Engraving grayscale bitmaps using a dithering pattern requires some practice and a bit of trial and

error to achieve perfection. It also requires some knowledge of bitmap editing software. These images

will visually appear dierent on one material as opposed to another material even if you use the same

driver settings. As a rule of thumb, use an Image Density setting of 5 using halftone or diusion pattern

on harder materials, such as marble, anodized aluminum or microsurfaced engraver's plastic. Use an

Image Density setting of 3 using the halftone or diusion pattern for softer materials, such as wood or

materials that you intend to engrave very deeply.

Image Enhancement

The Image Enhancements controls allow the user to “ne tune” the image to enable the laser system to

produce the highest quality, highest detailed images at high or low speeds. Image Enhancement may be

used at any engraving speed and with any material.

Note: The Image Enhancement settings are designed to work with the BLACK pen color in the printer

driver. However, the other seven pen colors of the printer driver will use the same Image Enhancement

settings. Keep in mind that those settings will have a dierent resulting eect on if the other colors’ %

power, % speed and PPI are dierent than the black pen color’s setting.

Denitions

CONTRAST: Contrast adjusts the dierence between the unengraved and engraved areas in the high density

part of the graphic or where there is the most concentration of graphic pixels (in between the dotted lines),

as the following diagram illustrates:

Note: Image Enhancement will cause les to take longer to print. Since most materials do not require

the use of Image Enhancement, use this feature only as needed. Image Enhancement and 3D Eects

cannot be selected at the same time. The printer driver will automatically notify you if you attempt

to do so. Image Enhancements work best for low power, high speed applications such as marking

anodized aluminum, etc.

The following procedure may appear lengthy, but when you learn how to use the controls, establishing

the correct parameters is easy and quick. Once you have established those parameters you can “SAVE”

them in the ULS printer driver as .LAS settings and recall them when needed. Many users choose to name

these saved settings according to the application material’s name.

Texturize

The Texturize feature adds random textured laser pulse patterns to an engraving job while using

Image Enhancements. It reduces motion system marks like banding from appearing on some materials

like tile and marble.

Within this eective area, using too little CONTRAST may cause some parts of the letters to appear thin,

faint, fuzzy or even non-existent. Having too much CONTRAST will cause the eective area to appear thick,

bold or over-powered.

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Universal Laser Systems VLS3.50 Guide de l'utilisateur Page 36

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