Universal Laser Systems X-600 Troubleshooting Guide download pdf (Page 35)

OPERATION AND PRINTER DRIVER CONTROLS

Section 3-10

% Power and % Speed work together in determining how deep the engraving or cutting will be.

Higher power and slower speeds produce deeper results. Lower power and higher speeds produce

shallower results.

NOTE:

100% raster speed is different than 100% vector speed. Due to the inertia of the X-axis

arm, movements in the Y-direction, the speed range is one-third raster speed.

PPI

Available settings are 1 to 1000. The laser beam is always pulsed and never “on” continuously even

though it may appear that way. The PPI setting indicates how many laser pulses, per linear inch, the

laser cartridge will emit. The pulsing of the laser beam is electronically linked to the motion system.

These pulses will always fire, equally spaced, from one to the next, regardless of changes in speed.

In raster mode, the laser pulses are applied in bi-directional, horizontal scan lines just

like a dot matrix printer. If you set the PPI to 500 and use the standard focusing lens

(2.0”) which has a laser spot size of five thousandths of an inch (.005”), pulses will

fire every .002 inches (500 PPI), which will produce pulse overlap. Raising the PPI

higher, such as 1000, the pulses will overlap more whereas lowering the PPI to

something like 150 will spread the pulses out far enough where they may not overlap

at all. When raster engraving filled objects, it is advisable to use a PPI setting of 500 or higher. If

using less, the image resolution of the engraving is reduced. In some rare cases, using less than 500

PPI may produce better results.

In vector mode, laser pulsing follows the path of the outline of the object. Imagine

the laser system working like a sewing machine where the stitching always remains

consistent whether you sew fast, slow, or around curves. The setting you use will be

application material dependent. Using less than 150 PPI may result in the pulses

being spread so far apart that they may or may not touch one another. Perforated

paper has this characteristic. Higher PPI settings may cause more of a melting or

burning effect on the edges whereas lower PPI settings may reduce the burning, melting, or charring,

but may result in a serrated or perforated-looking edge. Increasing or decreasing the PPI setting

does not affect engraving speed, only the frequency of the pulses.

Z Axis

By selecting YES, the Z axis will automatically compensate for material thickness. Using calipers,

measure the thickness of material to be engraved or cut. Using the slider, set the thickness

measured.

Flow (Air / Gas)

All XL Series Engravers come equipped with the air and gas option standard. Simply choose from Air

or Gas in the Pen Mode. Using the slider, set the % of pressure desired.

Set Button

After making % Power, % Speed, and PPI adjustments, you must click the Set button to register the

change. If you do not click on Set, but click the OK button instead, the settings will revert back to the

previous settings.

Image Density

This setting determines how many raster strokes per vertical inch of travel the motion system steps down

to produce the engraving. It can also be referred to as the vertical lines per inch or fill spacing. There are

six DPI settings to choose from 1000, 500, 333, 250, 200 and DRAFT. In the Windows XP driver it is

termed Image Density; there are 6 Image Density choices. Higher Image Density (DPI) settings produce

better quality raster images, but reduce productivity by increasing engraving time. Lower Image Density

(DPI) settings produce lower quality raster images, but increase productivity by decreasing engraving

time.

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Universal Laser Systems X-600 Troubleshooting Guide Page 35

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