Preparing The Engraving Pattern; Focusing - Omtech SH-G570 User Manual

4 Operation

4.2.4 Preparing the Engraving Pattern

1. Create the design.
You can do this directly in your engraving software or use any other graphics program, saving
or converting the file to a format compatible with the engraver. See the full list of acceptable file
§ 2.2 Technical Specifications
types in
2. Customize your design's contrast and engraving depth by adjusting the parameters in your
engraving software or directly through the control panel.
• The threshold for the lowest setting is around 10% and the laser may not fire at all when set
lower than this. It is NOT recommended to use the laser at full power. The recommended
maximum power setting is 70%, as prolonged use above that amount will shorten your
laser's service life.
• To increase engraving depth, increase the amount of energy per unit area by increasing the
laser's power or the number of loops or by slowing down the speed parameter. Engraving
too deep, however, reduces image quality, especially for coated materials.
• When working with new materials, remember that you should always start on the low end of
likely settings. If the effect is not yet strong enough, you can always rerun the design loop
several times or rerun it with more powerful settings until you create the effect that you want.
• Resolution should usually be set to 500 dots per inch. Reducing your image resolution can
be helpful in some cases, reducing flaming and increasing the energy of the pulse in a way
that improves the quality of the resultant image in some materials such as some plastics.

4.2.5 Focusing

1. Open the cover.
2. Use to move your laser head about 2.5 inches above the material.
3. Placing the acrylic focus tool on top of the
material.
4. Carefully raise the workbed by using the
manual adjustment knob until the laser head
barely touches the top of the acrylic tool
without applying any pressure.
Make sure the engraving distance is correct.
Again, NEVER attempt to focus the laser
either way WITHOUT some material on the
workbed.
5. Place your sample material and laser head to
your desired location.
6. Close the cover.
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