LONGER How To:Adjust the Red Dot Focusing Module on the Nano Duo
The red dot focusing module on the Longer Nano Duo helps users quickly align the laser’s focal point for precise engraving. If the red dots become misaligned due to movement or impact, it’s essential to recalibrate the system. This guide covers how to find the correct focal distance (220.5mm), activate the red dot in both the device screen and LaserBurn software, and manually align the dual red lasers using simple tools. Proper adjustment ensures high engraving precision and reduces errors caused by focus issues.








