Laser Marking FAQ

Blurry or incomplete laser marking is usually caused by focus misalignment or lens contamination. Here are the common causes and recommended troubleshooting steps to restore clean, precise marking results:

Common Causes:

• Incorrect lens parameter setting: Using the wrong “Lens Type” in the Marking Mate software may result in improper focus depth, causing the beam to defocus.
• Improper focal distance adjustment: The laser is not precisely focused on the material surface, reducing energy density and marking clarity.
• Contaminated or aged optics: Dust, oil, or scratches on the lens can scatter the laser beam and lower marking accuracy.

How to Check and Improve:

1. Verify lens parameters: Open Marking Mate → under “Working Field”, check that the “Lens Type” matches the actual installed lens.
2. Adjust focal distance: Use a focus gauge or test marking to fine-tune the Z-axis height until the beam is perfectly focused on the material surface.
3. Clean the lens: Wipe the focusing and protective lens gently using lint-free cloth and medical-grade alcohol to maintain optical transparency.

After completing these steps, text edges and line clarity should significantly improve. If the problem persists, please contact Yao Hung Technology’s after-sales service for professional inspection of the laser power and optical path alignment.

Laser black marking (also known as laser annealing) is a precise surface marking technique used for stainless steel artworks, jewelry, and high-end components. It creates a rich black tone through surface oxidation without damaging the base metal.

Recommended Settings:

• Reduce marking speed: Slower scan speed stabilizes heat input and prevents surface burning.
• Lower laser power: Use medium-to-low power to minimize energy density and avoid material damage.
• Increase pulse frequency: Higher frequency helps form a uniform oxide layer, enhancing color depth.
• Apply multiple light passes: Gradual layering produces deeper black tones while keeping the surface smooth.

By fine-tuning these parameters, you can achieve sharp edges, deep black color, and scratch-free surfaces. The optimal settings may vary depending on your laser source, material composition, and focal distance — we recommend running a few test markings before mass production.

Laser Deep Engraving is a precision process that removes multiple layers of metal through controlled energy stacking. If you want to achieve deeper engraving with sharp, clean edges, follow the key setup principles below:

Key setup guidelines:

• Use a short or medium focal-length lens: Concentrates laser energy density, improving material removal efficiency and depth control.
• Increase laser power output: Higher power accelerates depth accumulation, but avoid overheating or surface melting.
• Lower the pulse frequency: Reducing frequency increases per-pulse energy, enhancing ablation strength and metal removal.
• Control scanning speed: Slower speed focuses energy in one area, allowing greater depth per pass.
• Engrave in multiple thin layers: Gradual layer-by-layer engraving ensures deeper marks without deformation or surface burns.
• Improve dust extraction and cleaning: Deep engraving produces significant metal debris; use an exhaust system and regular cleaning to maintain quality and machine safety.

Different metals (such as stainless steel, aluminum, and copper) absorb laser energy differently. Always fine-tune parameters based on the material’s reflectivity and heat conductivity. We recommend performing small-scale test runs to balance depth, smoothness, and edge sharpness for the best engraving quality.

The X.Y-axis motion stage is a key component that enhances marking precision and production efficiency, especially in large-area and high-stability laser marking applications.
If your production faces challenges like limited marking range or inconsistent positioning for multi-part jobs, an XY motion stage offers the most effective solution.

When to use an XY motion stage:

• Mass-production marking: Ideal for repetitive, high-volume jobs requiring continuous automation and consistent alignment.
• Large marking area: When a single lens cannot cover the full surface, the XY stage extends the marking range with precise overlapping control.
• Accurate image scaling: Prevents distortion from multiple repositioning steps, maintaining original proportions and design clarity.
• High-precision consistency: Combining precision motion control with automation software ensures micron-level accuracy and repeatability.

Summary: The XY motion stage is ideal for large-area engraving, batch processing, and fixture-based marking, significantly improving automation efficiency and product uniformity.
For custom motion systems or multi-axis integration, contact Yao Hung Technology Co., Ltd. for a tailored automation solution.