Longer Ray5 stops working after some seconds

Hello this is my first Topic here.
I‘m new here and also new in laser cutting.
I find no solution for my Problem, so I will try to find here an answer.
When I start engraving the laser stops working after 3-5 seconds.
I think my configuration is Not correct. I sync the boudrate form windows and lightburn without succses.
Help in german will ne much easyer for me :slight_smile:
Thank you for your help.

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