Universal Laser Systems PLS3.60 Скачать руководство пользователя

Страница: 107 / 116

ADVANCED SYSTEM OPERATION

Section 9-13

Starting with the top rectangle set the power setting to a value that you know will be too low. For
example, set it to 5% power and the rest of the parameters to 100% speed, 1000 PPI, and Image
Density 5. At this time, ensure that Image Enhancement is

NOT

enabled. Engrave the first

rectangle at 5% power, increasing the power for each subsequent rectangle in increments of 5%
finishing the series off at 25% power and note the results. What you are looking for is the

LOWEST

power setting that has the cleanest removal of material. This would be the nominal

power setting. While higher than nominal settings may also produce clean engraving, it will
overpower the material and may cause highly detailed engraving, unlike these rectangles, to
appear too thick, bold or washed-out. If 25% is not enough power, then engrave the rectangles
again, this time starting at 25% and incrementing by 5% and so on. In our particular example,
we’ll say that 20% power looks good but 15% appears underpowered. Since we know that this
material happens to be sensitive to small power changes, we’ll need to narrow it down a bit
further. Engrave the rectangles once again, but this time start the top rectangle at 15% then add
1% for the next rectangle and so on until you reach 20%. The results now indicate that nominal
power setting of 17% power looks as if it is the

LOWEST

power setting that produces the

cleanest results at 100% Speed, 1000 PPI, and Image Density 5.

Step 2: Using text to set the CONTRAST parameter.

Type in a random line of text, using the Times New Roman font, set at 8 or 10 points in size.
Make sure that the text string is at least 6 inches long and that the characters used include
punctuation marks, spaces, and lower and upper case as in the following example:

Universal Laser Systems, Inc. produces the “BEST” laser systems in the world!

Engrave it with the settings determined in step one but this time ENABLE Image Enhancement
and set CONTRAST to 0, DEFINITION to 0, DENSITY to 100 and the TUNING value to +4. You
should expect the results to appear fuzzy, having parts of the characters missing, and overall
engraving quality to be not as good as expected. This is normal. Move the line of text, slightly
downward in your graphics software so that you will engrave a clean part of the material but
keeping it close enough to the previous engraving so that you have something to compare it to.
Keep engraving samples and adjusting the CONTRAST upwards in increments of 5 and note the
results. The objective is to adjust the CONTRAST just enough to cause the high density areas of
the text to be sharp and clear. Ignore the appearance of the ascenders (like quotation marks or
the tops of h’s) and descenders (like commas or the bottom of lower case p’s) as they will appear
faint and unclear. This is to be expected.

DO NOT

adjust the CONTRAST setting to try to force

these to appear, we will use the DEFINITION adjustment for those. Right now,

ONLY

concentrate on the high density part of the characters. Setting CONTRAST too high can cause
the characters to appear “fat” or “bold”. Adjusting the CONTRAST by just one number can make
a big difference in appearance so continue adjusting the setting by first incrementing in 5’s until
you get close, but then fine tune the setting by incrementing or decrementing by 1’s until the
exact setting is achieved.

Step 3: Adjusting DEFINITION to enhance the ascenders and descenders.

Now, increase the DEFINITION in increments of 5 at a time until the ascenders, descenders,
commas, quotation marks and any other low density area characters begin to appear. The
objective is to increase the setting just enough to cause these parts of the graphic to match the
appearance of the high density areas. Setting the DEFINITION too high will result in ascenders
and descenders appearing too “fat” or “bold” compared to the rest of the graphic.

Step 4: Reducing DENSITY as needed.

Once CONTRAST and DEFINITION have been set to the appropriate levels, the graphic may or
may not appear to be “fat” or “bold”. In most cases, the appearance will look great without
making any more adjustments. However, if everything appears overpowered or bold, try reducing
the DENSITY down from 100 in increments of 5 and note the results. If the characters begin
appear to be “chunky” or appear as if pixels have been eliminated, then you have reduced it too
much. Normally you can leave the DENSITY at 100. However, there may be cases where you
need to reduce it. Reducing DENSITY can be very useful when the image is inverted such as
white text with a black background. In this case, if the engraved area (the background) is
overpowering the text (foreground) then reducing the DENSITY may help thicken the text.