---
title: Finding Optimal Focus for Your Galvo Fiber Laser
description: Guide to determining the optimal focal length for your Galvo fiber laser. Steps include focusing on a flat surface, measuring focal length, and creating a focus tool.
---

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# Finding Optimal Focus for Your Galvo Fiber Laser

This article explores the process of determining the optimal focal length for your Galvo fiber laser, a crucial step to achieve the best results in your engraving projects.

**Part 1: Step-by-Step for Focusing on a Flat Surface**

1. **Raise the Laser Head**
   
     - Raise your Galvo head as high as it will reasonably go.
2. **Draw a Square or Rectangle**
   
     - Click on the rectangle tool in the left-hand toolbar.
     - Click and drag on the workspace to draw a square or rectangle shape. Hold the **Shift** key to ensure it remains a perfect square or rectangle.
3. **Set the Fill Mode**
   
     - With the square or rectangle selected, go to the **Cuts and Layers** window on the right side of the screen.
     - Double-click the layer to open the cut settings window.
     - Set your settings to 5 speed, 100 power, and 20 frequency. Set the mode drop-down menu to **Fill**, then click **OK**.
4. **Frame and Test**
   
     - Click **Frame**, then toggle the **Run Continuously** option.
     - Ensure that your red laser shows on the test piece and is not hanging off any edge.
     - Size the square to fit on your test material.
     - Continue lowering the laser head slowly until the engraving noise reaches its maximum loudness and you see the burn color turn to blue.
     - Make a note of the laser's current position on the tower's measurement marks.
     - Lower the head further until the blue color fades to orange, then raise it back up until the laser light is blue again.
     - Make a note of the laser's current position on the tower's measurement marks.
5. **Calculate the Optimal Focus**
   
     - You now have two measurement values. Split the difference between these two values and raise the laser head to that position.
     - Your flat surface is now focused.

**Part 2: Measuring Focal Length**

1. **Measure the Focal Length**
   
     - Using an acrylic ruler, measure from the engraving surface to the bottom lip of the lens.
     - If your acrylic ruler has a lip, measure the offset with calipers to calculate the accurate focal length.
2. **Create a Focus Tool**
   
     - Creating a focus tool, such as a marked dowel or laser-cut acrylic focusing tool, can make it easier to adjust the laser when working with objects of different sizes.

**Conclusion**

You have learned how to find the focal point for your laser engraving by using crisp outlines, audio cues, and measuring techniques. By fine-tuning the focus and creating a focusing tool, you can achieve optimal focus and streamline your workflow. Happy engraving!

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