Air bubbles in the LCD screen

Air bubbles in the LCD screen

Symptoms​

When the LCD screen is on, there are air bubbles in the cooling board under the LCD screen.

Small air bubbles
Large air bubbles

Possible Causes

Residual air left in the coolant, and air bubbles accumulate at the cooling board.
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Diagnostic Steps

Diagnosis:  If there are many air bubbles stuck to the cooling board, these bubbles will affect the uniformity of light and consequently the printing results. It is necessary to remove air bubbles.
Solutions:
Do not look directly at the screen with your naked eyes when the LCD screen is on, the ultraviolet light will damage your eyes
  1. Turn on the preheating function and perform a print without installing the build platform and resin tank, the preheating function will heat the coolant and increase the fluidity of the coolant. When the print  starts, the pump will turn on to circulate coolant, and the air bubbles will be washed away by the coolant flow.
    Reference article: How to enable preheating function of NBEE
  2. If the problem persists, slightly and carefully tilt the printer to the left side of the machine when printing to let the air bubbles go out through the outlet of the cooling board.

  1. Drain the coolant and add it again.
    Reference video: How to drain the coolant and add it again
When tilting the machine, two operators are needed to move it gently and carefully to ensure the safety of the machine

Conclusion

By following the above-mentioned diagnostic steps, you should be able to troubleshoot the air bubbles issue, if the problem persists, please contact support@uniz.com.