How to achieve a strong, rich tone of the engraved area
When a larger area is engraved, a rough surface can sometimes appear near the engraving area, along with dull coloration (e.g., greyish rather than luscious black).
The solution to this is often one or a combination of these adjustments:
Reduces the depth of the engraving and allows for a smoother surface of the engraved area. Also, removing less material reduces the amount of residue and dust, causing dullness when settling on the freshly, and therefore hot, engraved area.
The air assist is designed to prevent dust from settling onto the lens and thereby causing harm to it. For materials causing little to no smoke or dust, such as TroLase laminates, air assist can be reduced or turned off.
Regular cleaning intervals are recommended to make sure no harm is being done to the lens.