Creality CV-Laser Module Benutzerhandbuch Seite 19

3. Please place the engraving material under the laser head, counter-clockwise push
the fixed focus bar, adjust the laser focus to the appropriate value through the
knob (different thickness of the material corresponding to different values), until
the focusing bar touches the engraved material surface when natural vertical
down. Finally, clockwise push the focusing bar until it is attached by the magnet,
then select "Finish".
4. Return to the main interface, select "Auto Home", wait for the machine back to
zero completed.
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