1, the focal length is adjusted properly.
2. Whether the over-watered paper on the engraved material is too much, or if the amount of water on the paper is too much.
3, whether the laser tube aging.
4. Is the light path correct? (re-correction)
5, lens contamination, dust too thick.
6, broken lenses.
7. Contamination of the laser tube head.
2. Whether the over-watered paper on the engraved material is too much, or if the amount of water on the paper is too much.
3, whether the laser tube aging.
4. Is the light path correct? (re-correction)
5, lens contamination, dust too thick.
6, broken lenses.
7. Contamination of the laser tube head.
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