DPI is a common engraving resolution setting that can have dramatic effects on engraving run times. Many substrates such as wood and fabric can be laser engraved using lower DPI settings, often as low as 300 or 400, reducing the number of engraving strokes or passes. By lowering the DPI setting, engraving run times can be reduced by 30 to 40 percent, often with similar or even better engraving results.
-Mike Fruciano, Coherent