Snapmaker TH-L-P100-W450, Quick Start Manual

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25 Quick Start Guide
3.2 Calibrate Toolhead Focus
How It Works: Focal Point
How It Works: Auto Focus
To achieve the best focusing result, let the focal point fall right on the surface of the
material throughout engraving and cutting.
The focal length is the distance from the center of the lens to the focal point of the
lens. For the 10W Laser Module, the focal length (f) is a fixed value. Besides, the
distance (h1) from the center of the lens to the bottom of the air concentrator hood is
also known to the machine. Based on these two values, the machine can calculate the
lifting height (h2) of the toolhead after the toolhead touches the laser engraving and
cutting platform, and thus do auto focusing.
f: focal length
h1: the distance between the center of the lens
and the bottom of the air concentrator hood
h2: the lifting height of the toolhead
h2 = f - h1
f
h2
h1