How to Use Manual Focus with the Nova Series
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24-09-05
Compared with auto focus, manual focus can be faster and more flexible in many Nova Series laser workflows. It is especially useful when the material shape, laser head, rotary setup, or sensor condition makes auto focus less suitable.
Manual focus does not require a dedicated manual focus button. Instead, it uses a focal stick to set the correct distance between the nozzle and the material surface.
1. What Is a Focal Stick?
A focal stick is a triangular measuring tool, usually made from durable 5 mm acrylic. It helps you position the laser head at the correct focus distance before cutting or engraving.
2. How to Use the Focal Stick
The correct manual focus method depends on the laser head being used. The Nova Series supports different focusing distances for different laser head setups, so always choose the method that matches your current laser head.
2.1 Manual Focus for a 2-Inch Laser Head
For a 2-inch laser head, place the longer right-angled edge of the focal stick on the material. Then adjust the nozzle until it touches the 5 mm scale on the focal stick.
There is also a quicker method: lay the focal stick flat on the material, then adjust the nozzle until it touches the 5 mm stick surface.
2.2 Manual Focus for a 4-Inch Laser Head
For a 4-inch laser head, place the longer right-angled edge of the focal stick on the material. Then adjust the nozzle until it touches the 10 mm scale.
2.3 Manual Focus for Rotary Jobs
For objects processed with a rotary attachment, first check that the object is level. Then select the focus method based on the laser head model you are using.
Manual focus is often the better choice for rotary work because the shape of tumblers and other cylindrical objects may not work well with the auto focus sensors.
3. How to Adjust the Focal Stick
If you add or remove a rotary attachment, replace the laser head, or change the working setup, adjust the laser head position before processing the material.
Step 1: Raise or lower the plate to the proper position.
Step 2: Place the material in the correct position, then put the focal stick on the material.
Step 3: Loosen the brass knob, let the laser head and nozzle touch the focal stick, and tighten the knob after adjustment.
4. When to Use Manual Focus
Manual focus is useful when auto focus is not the best option or when you need more control over the focus distance. Common use cases include rotary work, non-standard laser heads, uneven objects, transparent materials, defocus control, and sensor-related issues.
Rotary jobs: Rotary attachments and tumblers may not work well with sensors, so manual focus is often more practical.
A 4-inch laser head: Manual focus can work with a 4-inch laser head, while auto focus may not be suitable for that setup.
Odd-shaped or uneven objects: For warped, wavy, or varying-thickness materials, manual focus lets you focus on the specific local area you want to engrave.
Transparent materials: For clear cast acrylic and similar transparent materials, auto focus infrared light may pass through the material, while manual focus can still work properly.
Defocus control: When you need to control the defocus distance, use the scale on the manual focus stick as a reference.
Sensor issues: Manual focus is also helpful when sensors are misaligned or not functioning correctly.
5. Reference Video
Watch the reference video below to see the manual focus process in action.
Nova Series manual focus reference video.
6. Final Tips for Better Manual Focus
Manual focus is a simple but useful skill for Nova Series users. Once you understand how to use the focal stick with different laser heads, you can handle more materials, rotary jobs, and special focusing situations with confidence.
Need Help with Nova Series Setup?
Contact Thunder Laser for support with manual focus, laser head setup, rotary use, and daily machine operation.
Contact UsContents
1. What Is a Focal Stick?
2. How to Use the Focal Stick
3. How to Adjust the Focal Stick
4. When to Use Manual Focus
5. Reference Video
6. Final Tips for Better Manual Focus
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NOVA SERIES MANUAL FOCUS FAQS
Q1: What is manual focus on the Nova Series?
Q2: What is a focal stick used for?
Q3: How do I use manual focus with a 2-inch laser head?
Q4: When should I use manual focus instead of auto focus?
Q5: Can manual focus be used for rotary engraving?
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