Why is there no wind in the power supply fan after the UV laser marking machine is started?

Laser engraving machine application on shampoo bottle and water bottle for production date, numbers, logo, plastic laser marking solution.

CO2 laser marking machine application on leather, customizable portable co2 laser marking machine for more different products.

Laser marking/engraving/etching machines for all kinds of accessories, logo, scale, photo marking on products.