Engraving with the Endurance lasers and engravers is possible only at 300 dpi.
Please, note: Engraving with the Endurance lasers and engravers is possible only at 300 dpi.
http://raster-spb.ru/userfiles/image/glossary/dpi/schema_300.jpg

This limitation is due to:

1. step engines, which most 3D printers and CNC machines have;
2. focusing lens, which we use to focus the laser beam;
3. mass moment of inertia arising at the laser motion.

Endurance is working at the selection of more powerful lenses to ensure engraving at a higher quality (resolution).