Above setting based on 30W laser

What does a focus lens do?

A laser beam emanating from the laser tube is typically around ? inch (240 thousandths) in diameter D too large for any practical engraving or cutting. In order to achieve high-quality engraving and precise cutting with your laser system, the laser beam is directed through a series of mirrors and through the focus lens. The focus lens narrows or focuses? the laser beam to a small, precise spot that will enable graphic images to be resolved with resulting good engraving or cutting. As the laser beam leaves the focus lens, it takes on an “hourglass? shape, with the ideal focal distance within the center of the hourglass.”

Which Focus Lens do you need for which project?

1.5 Inch lens

• Optional lens for high-Resolution engraving.
• Recommended for raster engraving above 600 DPI resolutions.
• Recommended for small font or fine detail engraving.
• Produces spot size of 0.003 to 0.0065 inches in diameter.
• Good cutting lens for thin (< = 1/16 inch) material.

2.0 Inch lens

• Standard lens on most laser systems.
• Multipurpose for both engraving and cutting applications.
• Recommended for raster engraving from 300 DPI to 600 DPI resolutions.
• Produces spot size of 0.004 to 0.007 inches in diameter.

2.5 Inch lens

• Optional lens for low Resolution? Engraving.
• Recommended for raster engraving at or below 300 DPI resolutions.
• Recommended for large-area engraving (produces larger laser beam spot size thus removes wider path of material resulting in smoother engraved area).
• Produces spot size of 0.008 to 0.01 inches in diameter. (Good cutting lens for thicker 1/16 inch or greater) material.

4.0 Inch lens

• Produces focused beam over longer vertical distance. Specialty lens typically used for engraving within recessed area (bowl or plate).
• Used for cutting thick materials.