RAY5 Mini / Mini S: Why Your Engraving Looks Blurry (And How to Fix It)

If your RAY5 Mini or Mini S laser engraver is producing unclear or blurry results, the issue is usually related to focus, settings, or material compatibility. Follow the steps below to troubleshoot and improve your engraving quality.

1. Check the Laser Focus

Incorrect focus is the most common cause of poor engraving.

• Use the focus block that comes with your machine
• Adjust the laser head until the correct focal distance is achieved
• Make sure the laser spot is as small and sharp as possible

A properly focused laser ensures clean lines and better detail.

2. Verify S-Value Settings in LightBurn

In LightBurn:

• Go to Edit → Device Settings
• Check that S-Value Max = 1000

If this value is incorrect, your laser power output may not match your settings, resulting in weak or inconsistent engraving.

3. Check Your Engraving Parameters

Incorrect parameters can significantly affect engraving quality.

Pay special attention to:

• Speed (and its unit: mm/min vs mm/s)
• Power percentage
• Number of passes

Refer to the official parameter table for your material when possible.

In LaserGRBL:

• Set S-MAX = 10 × laser power percentage
• Example: 100% power → S-MAX should be 1000

4. Enable Constant Power Mode

Make sure your laser is running in constant power mode (usually M3 mode):

• This ensures consistent energy output during engraving
• Prevents uneven or faded results

5. Inspect and Clean the Lens (Window Mirror)

A dirty lens can reduce laser strength and clarity.

• Check the laser head window (lens) for dust or residue
• If dirty, gently clean it using lens cleaning paper, or A lint-free cloth with a small amount of alcohol

⚠️ Avoid applying pressure to prevent damaging the coating.

Final Tips for Better Engraving Results

• Always test settings on scrap material first
• Use high-contrast materials for clearer results
• Keep your machine clean and well-maintained