¶ 1. Why Do You Need to Focus?
In laser engraving and cutting, focusing isn’t just “setting the right height.”
It directly determines the sharpness and penetration power of your engraving results.
¶ 1.1 What Does a Laser Beam Look Like?
The beam emitted by the laser head is not perfectly parallel.
Instead, it narrows into a cone (an hourglass shape) before expanding again.
There are two key concepts:
- Focal Point: The spot where the beam is thinnest and the energy is most concentrated.
- Focal Length: The fixed distance from the lens to the focal point .
¶ 1.2 Why Is Focusing Necessary?
- The purpose of focusing is to adjust the laser head height so that the focal point falls exactly where you need it—usually the material surface (engraving) or inside the material (cutting).
- Correct focus: Finer lines, cleaner edges, concentrated energy, and crisp results.
- Incorrect focus: Larger spot size, dispersed energy, shallow engraving, scorched edges, or blurry patterns.
¶ 2. Focusing Logic and Workflow on Aliencell X1
Aliencell X1 provides a flexible focusing system designed for both beginners who prefer “one-click processing” and advanced users who need precise control for specific materials or locations.
¶ 2.1 Fully Automatic Smart Focusing (Recommended)
This is the simplest option.
- How it works: No manual focusing required. After setting your processing parameters, simply click Start.
- Logic: The device automatically detects the material surface and adjusts the Z-axis to the optimal position based on the built-in focal distance.
¶ 2.2 Measurement-Based Focusing (Advanced Control)
When you need to verify the height manually or work with uneven surfaces, you can use the Distance feature in the software.
¶ 2.2.1 Understanding the “Distance” Parameter
In the parameter panel, there is a key parameter called Distance.
Important: This “Distance” ≠ Focal Length
It represents the physical distance from the bottom of the laser module to the material surface.
After obtaining this value, the software automatically applies the formula:
Tip: Once you manually enter or measure this value, the system will skip automatic focusing and use your supplied measurement during processing.
¶ 2.2.2 How to Get the Distance Value?
Click the distance input box and choose from the following three methods:
¶ Method 1: Manual Input
Ideal when you know the material thickness, or when the sensor cannot measure the surface (e.g., glass, soft fabric).
- How to do it: Use a ruler to measure the distance from the bottom of the laser module to the material surface, then enter the value in millimeters.
| Measurement Scenario | Demo |
|---|---|
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¶ Method 2: Measure at Current Position
- Steps:
- Move the laser head to the target area.
- Click the measurement icon
and select Measure at Current Position. - The laser head will descend vertically to probe the surface, then automatically fill in the value and return to its original height.
- Move the laser head to the target area.
¶ Method 3: Measure by Select Point
This is the most flexible method—“click anywhere to measure.”
Perfect for uneven materials when you need to pick a specific point (like the highest spot) as the focus reference.
- Steps:
- Click the measurement icon and select Measure by Select Point.
- Your cursor becomes a red crosshair.
Click any point on the canvas where you want to measure.
- The machine moves to that coordinate and performs the measurement.
- Click the measurement icon
Pro Tip: To cancel Select Point mode, press ESC, right-click, or click anywhere outside the canvas.
¶ Summary: Which Focusing Method Should I Use?
- Beginners / Everyday Use → Just hit Start (full auto-focus, easiest).
- Irregular objects / precise spots → Measure by Select Point (accurate and visual).
- Transparent or special materials → Manual Input (avoids sensor limitations).