Thank you for posting. Please post some pictures of what you’re seeing.
Which Ruida Controller is your 80W laser engraver using?
I knocked your other post off the other thread for two reasons.
Your symptoms seem pretty different so the diagnostic path will be different. Looking forward to your pictures. ( a screen capture tool like ‘snip’ is very helpful. )
Second, Consolidating your question into one place helps you get the answers you’re looking for. Making one focal point for your question improves clarity.