laguna DT-18 Owner's Manual page 25

Operation 25
13.) Adjusting the Thickness of Female Workpiece:
Adjusting the depth of female workpiece by handle (A) of first picture, you could turn the screw (A) by hexagonal
wrench. The female adjusting screw is under the male adjusting screw. The adjustment indicates by the scale.
The front of female depth adjusting board aim at the scale. The scale adjustment is bigger, the depth would plus
more. When it indicates "0", the depth is the less.
The scale indicates don't be over "0", or it may
damage the cutter.