Reason 1: Inconsistent distance between the workpiece and the laser head.
Solution: Adjust working table to unify distance between workpiece and laser head.
Reason 2: Reflective lens unwashed or rupture.
Solution: Cleaning and replacement.
Reason 3: Graphic design problems.
Solution: Adjust the graphic design.
Reason 4: The optical path deflection.
Solution: According to the optical path adjustment methods, re-adjust the optical path.