5. Laser engraving, sometimes strong and sometimes weak or no laser emits or laser emits more points?

Reason 1: Reflective lens rupture.

Solution: Replace the reflective lens.

Reason 2: A and B slots on water sensor rusted or not connected good.

Solution: Check connection and assure water flowing smoothly from point A to B.

Reason 3: Optical path changing.

Solution: Re-adjust the optical path.

Reason 4: Setup in Control Panel.

Workaround: Reset.

Reason 5: Long working, the water temperature in the tank is too high.

Solution: Replace the cooling water.