PCB engraving machine and bright, without light

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PCB engraving machine water circulation may be normal, water protection, water protection switching.

Check the lens is too dirty or damaged, the light path without serious deviation, cleaning or conversion lens, adjusting light path.

Lens optical path is normal, check whether the normal circulation of water, such as water and clean water pump, or conversion, dredge pipe.

Such questions as usual, motherboard, laser power, laser tube are likely to cause this phenomenon, replace the PCB engraving machine conversion parts, find out the reasons.