products-tutorial

If your Nano Pro laser engraver suddenly stops during engraving, it is usually related to USB connection issues or a machine safety alarm. This guide explains the common causes and how to fix them quickly.

1. USB Data Connection Loss

A loose or damaged USB cable can interrupt communication between your computer and the laser engraver, causing the job to stop mid-process.

How to fix:

• Reconnect the USB cable securely
• Replace the cable if it is worn or unstable
• Ensure a stable connection before starting engraving

2. Machine Alarm Triggered

The machine may automatically stop when a safety alarm is triggered, such as vibration, tilting, or unsafe operating conditions. When this happens, the red indicator light will turn on.

How to fix:

• Remove the cause of the alarm (e.g., stabilize the machine)
• Wait for the alarm to clear and resume operation
• If the alarm persists, connect to your computer
• Open LightBurn or LaserBurn and enter $X in the console to reset the alarm

Conclusion

If your Nano Pro stops during engraving, the issue is most commonly caused by a USB connection failure or a triggered safety alarm. By checking the cable connection and resetting the alarm using $X, you can quickly restore normal operation and continue engraving without further interruption.

👉 Keeping your connection stable and ensuring a safe working environment will help prevent most engraving interruptions.

• Lightburn: Click the button, select this port from the COM port list, and set

961200 baud rate.

Conclusion

Most Nano Pro connection issues are caused by wrong cables, missing CH340 drivers, incorrect port selection, or baud rate mismatch.

By ensuring a proper data cable, installing the correct driver, selecting the right COM port, and setting the baud rate to 961200, you can quickly restore a stable connection and start engraving smoothly.

Safety is the primary principle in laser equipment design. The Nano series laser engraving machines (including the Nano, Nano Pro, Nano Ruby, and Nano Duo models) incorporate a comprehensive, integrated safety system, encompassing both hardware and software, to create a reliable and secure creative environment for users and minimize potential risks.

1. Core Visual Protection: Professional-grade Laser Shielding System

This is the Nano series' most significant safety feature, providing physical isolation from laser radiation.

Fully Enclosed Red Light Shield

Physical Barrier: The high-density, opaque engineering plastic cover forms a completely enclosed space when the machine is operating, effectively confining the laser beam and its reflected light within the machine, preventing any accidental leakage.

Visual Warning: The striking red design is not only aesthetically pleasing but also serves as a strong safety warning, constantly alerting users that the machine is operating and preventing accidental opening of the cover.

Linked Protection: The light shield is linked to an intelligent sensor system. If the machine is touched or dropped, the laser automatically stops firing, eliminating any risk at the source.

OD4 High-Grade Protective Window

Professional Standard: The viewing window on the hood is made of professional-grade protective material with an optical density (OD) of 4 (OD4).

Ultra-High Protection: OD4 means the window attenuates lasers of specific wavelengths (such as the common 450nm blue laser) by a factor of 10,000 (allowing only one ten-thousandth of the light to pass through), effectively shielding them at a rate of 99.99%.

Safe Observation: This window allows users to clearly and safely monitor engraving progress and results without the need for goggles, ensuring both safety and convenience.

2. Electrical Safety

Ventilation and Cooling System

Built-in Exhaust Fan: When the machine is operating, a powerful built-in fan continuously exhausts smoke and harmful gases generated by engraving to the outside through the exhaust duct, keeping the interior clean and preventing the accumulation of harmful substances.

Overheat Protection: Both the laser module and the mainboard are equipped with temperature sensors. When the system detects an abnormally high temperature, it automatically stops operation, preventing damage from overheating and eliminating fire hazards.

Motion Sensor

If the machine is dropped during operation, the sensor will immediately trigger an alarm and stop operation.

3. Software and Operational Safety

Dedicated Control Software 

Safety Zone Setting: The software allows users to define safe engraving zones, preventing the laser head from moving beyond mechanical limits and protecting the device from damage.

Real-Time Status Monitoring: The software interface displays real-time information such as laser power, process progress, and temperature, providing users with a clear overview of the device's status.

Sturdy Construction

The Nano series features a high-rigidity aluminum alloy frame and non-slip feet, ensuring stability during high-speed operation and preventing accidental movement.

Summary: Your Safety, Our Full Protection

The Nano series laser engraving machine is more than just a highly efficient tool; it exemplifies a design built with safety as its cornerstone. From OD4-level protection for physical isolation to proactive intelligent electrical safety intervention to sophisticated software-level control, we've built a seamless safety ecosystem.

Core Security:

For Humans: A red light shield and OD4 viewing window protect operators' eyes from laser radiation.

For Objects: Overheat protection, motion sensors, and other features prevent fire and equipment damage.

For the Environment: An exhaust system reduces smoke pollution.

Choosing the Nano series means choosing peace of mind, allowing you to focus more on your creativity and production.

Check if your computer has the necessary drivers installed and correctly configured. If not, download and install the appropriate drivers for your Longer device:

Follow the steps below to confirm whether the driver is successfully installed on your computer:

Check CH340 Driver

A.It's possible that a driver required for the connection is missing or incorrectly installed.

B.For macOS 10.15 or later, there is no need to install the CH340 driver.

C.Download the following driver installation package：

https://www.wch.cn/downloads/CH341SER_EXE.html

Video Tutorial：

How to install CH340 driver of LightBurn for MacOS Sequoia system:

https://www.youtube.com/watch?v=JX-XsjLFei0

How to install CH340 driver of LightBurn for MacOS system:

https://www.youtube.com/watch?v=FBd1uEA9QUw

After the installation is complete, check the COM port:

a . For Windows

1.Connect the machine to your computer using the USB cable that came with the product.

2. Download and install the CH340 driver (clickable). You may need to restart your computer during the installation process.

3.（1）Please follow the installation instructions to ensure the driver is installed successfully.

·（2）If an error message appears during installation, please contact Longer Technical Support.

4.Go to Device Manager to check whether the driver is installed successfully.

· ·Right-click on the desktop and select [Manage].

· ·Select [Device Manager], click [Ports], and check whether there is a COM port named CH340 (if it exists, it means your device has been successfully recognized by the computer).

b.For macOS

1. Connect the machine to your computer using the USB cable that came with the product.

2.Download and install the CH340 driver (clickable). You may need to restart your computer during the installation process.

· ·Please follow the installation instructions to ensure that the driver is installed successfully.

· If an error message appears during installation, please contact Longer Technical Support.

· Restart the computer, reference path: System Preferences -> Security and Privacy -> General -> Allow.

· Allow the CH340 driver to load. You may need to restart your computer during this process. Please follow the on-screen instructions.

· Reconnect your device and LaserBurn/Lightburn/LaserGRBL should now be able to find your device.

· If the Allow button isn’t working, read on to find a solution.

1. Open Terminal by following this path: Go to > Utilities > Terminal

2. Copy the following command and paste it into your terminal:
sudo kextload /Library/Extensions/usbserial.kext
 

1. Press Enter (if a password command appears, enter your computer user password and press Enter again)

2. After the command is executed successfully, the following display will appear in the terminal

1.Website Update：https://espressif.github.io/esptool-js/

Visit https://espressif.github.io/esptool-js/ in your browser. You can flash the firmware online from this page. Select the baud rate as 921600 and click "Connect." Select your machine's COM port and click "Erase Flash" to erase the firmware. Enter 0x0 in the "Flash Address" field and click "Choose File." Once the firmware is located, click "Program" to begin flashing. Wait for the flash to complete and then reboot the machine.

2. MKS burning tool update

Open the MKS Laser Tool, select MKS ESP32 Download Tool to enter the program, select in order, find the firmware to be flashed, select the COM port corresponding to the machine, select BAUD: 250000, select ESP32: ESP32 S1, select FLASH SIZE: 16MB, click Erase to erase, and finally click Start to update the firmware. After the update is complete, restart the machine.

3. LaserBurn Desktop Update

After opening the software, click Open Burn in the upper left corner to enter the burning tool, select 912600 in Baud Rate, click Connect, modify Flash Address to 0x0, click Reupload to upload the firmware, and finally click Start Burn to start the firmware update. After the update is complete, restart the machine.

4. LaserBurn Mobile Update

After connecting the engraving machine to the LaserBurn app, go to "My Page" and click "About" → "Firmware Update" → "Nano Pro." Wait for the progress bar to complete.

Proper laser focus is one of the most important setup steps for achieving clean engraving lines and efficient cutting results. In this guide, you’ll learn exactly how to adjust the laser focus on the LONGER B1 laser engraver using the official focusing block method.

Whether you are a beginner using your machine for the first time or troubleshooting poor engraving quality, this tutorial will help you achieve more accurate and consistent results.

Table of Contents

• What This Guide Covers
• Quick Answer
• Why Laser Focus Matters
• Before You Start
• Requirements
• Precautions
• Step-by-Step Tutorial
• Common Problems and Solutions
• Tips for Better Results
• Frequently Asked Questions
• Final Thoughts

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What This Guide Covers

This guide explains how to:

• Adjust the laser focus on the LONGER B1 laser engraver
• Use the focusing block correctly
• Position the laser module properly
• Tighten the M3*20 handle screw securely
• Improve engraving and cutting precision

The procedure follows the official LONGER instructions exactly.

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Quick Answer

To adjust the laser focus on the LONGER B1:

1. Pull out the focusing block.
2. Loosen the M3*20 handle screw.
3. Move the laser module down.
4. Tighten the M3*20 handle screw when the bottom of the focusing block touches the plywood.
5. Close the focusing block.

This sets the correct focal distance between the laser module and the material surface.

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Why Laser Focus Matters

Laser focus directly affects engraving sharpness, cutting power, and overall machine performance.

When the laser is focused correctly:

• Engraving lines appear cleaner and sharper
• Cutting becomes faster and more efficient
• Burn marks are reduced
• Fine details are easier to reproduce
• Material penetration improves

If the laser focus is incorrect, you may notice:

• Blurry or wide engraving lines
• Incomplete cuts
• Excessive burning or charring
• Reduced engraving depth
• Poor detail quality

The LONGER B1 uses a focusing block system to help users quickly set the proper laser height for consistent results.

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Before You Start

Before adjusting the laser focus, make sure your machine is properly assembled and placed on a stable work surface.

It is also important to position your engraving material securely to prevent movement during setup or operation.

If this is your first time using the machine, review the official LONGER B1 setup documentation and safety instructions before proceeding.

Product Support  Link：https://www.longer3d.com/pages/download

Requirements

Prepare the following items before starting:

• LONGER B1 laser engraver
• Installed laser module
• Focusing block
• Plywood or engraving material
• Proper eye protection

Follow official machine specifications or instructions.

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Precautions

Before adjusting laser focus, keep these safety precautions in mind:

• Always wear appropriate laser safety protection.
• Ensure the machine is powered and positioned safely.
• Keep hands away from the laser emission area.
• Do not force the laser module during adjustment.
• Make sure the material surface is flat and stable.
• Tighten the M3*20 handle screw securely after positioning.

The LONGER B1 series includes multiple safety features designed to improve operational safety during engraving and cutting tasks.

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Step-by-Step Tutorial

Step 1: Pull Out the Focusing Block

Action

Pull out the focusing block from the laser module assembly.

Expected Result

The focusing block should extend fully and be ready to contact the plywood surface.

Important Notes

The focusing block is used to set the correct distance between the laser module and the material surface. This distance is critical for achieving proper laser focus.

Do not modify or replace the focusing block with unofficial spacers or measurement tools.

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Step 2: Loosen the M3*20 Handle Screw

Action

Loosen the M3*20 handle screw on the laser module.

Expected Result

The laser module should move freely up and down after loosening the screw.

Important Notes

Only loosen the screw enough to allow movement of the laser module.

Avoid removing the screw completely unless official instructions require it.

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Step 3: Move the Laser Module Down

Action

Move the laser module downward carefully.

Expected Result

The laser module should lower toward the plywood surface.

Important Notes

Lower the module slowly and steadily to avoid hitting the material surface too hard.

Ensure the plywood remains flat during adjustment.

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Step 4: Tighten the M3*20 Handle Screw When the Bottom of the Focusing Block Touches the Plywood

Action

Continue lowering the laser module until the bottom of the focusing block touches the plywood.

Then tighten the M3*20 handle screw.

Expected Result

The laser module should remain fixed securely at the correct focal height.

Important Notes

This is the most important part of the focusing process.

The focusing block touching the plywood indicates the correct focal distance recommended for the LONGER B1 laser engraver.

Do not overtighten the handle screw excessively.

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Step 5: Close the Focusing Block

Action

Close the focusing block after tightening the screw.

Expected Result

The focusing block should return to its stored position, and the laser module should remain properly adjusted.

Important Notes

Always close the focusing block before beginning engraving or cutting operations.

Leaving it open during operation may interfere with material positioning or machine movement.

Common Problems and Solutions

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Tips for Better Results

Use Flat Materials

Warped or uneven materials can affect laser focus consistency across the engraving area.

Check Focus Before Important Projects

Even small changes in material thickness may require rechecking the focus.

Keep the Laser Module Clean

Dust or residue on the laser lens can reduce engraving quality and cutting performance.

Secure Materials Properly

Movement during engraving may affect precision and focus consistency.

Perform Test Engravings

Before starting a large project, run a small test pattern to confirm the focus is correct.

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Frequently Asked Questions

How often should I adjust laser focus?

You should check and adjust focus whenever you change material thickness or notice reduced engraving quality.

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What happens if the laser is out of focus?

An unfocused laser may produce blurry engravings, weak cuts, excessive burning, or inconsistent results.

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Can I use materials other than plywood for focus adjustment?

The official procedure references plywood. Follow official machine specifications or instructions for other materials.

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Why is the focusing block important?

The focusing block helps maintain the correct distance between the laser module and the material surface for optimal laser performance.

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Should the focusing block stay open during engraving?

No. After adjusting the laser focus, close the focusing block before starting engraving or cutting.

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What does the M3*20 handle screw do?

The M3*20 handle screw locks the laser module in place after the correct focus height is set.

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Can poor focus damage engraving quality?

Yes. Incorrect focus can significantly reduce engraving sharpness and cutting efficiency.

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Is laser focus adjustment required for every project?

Not always, but it is recommended whenever you switch to materials with different thicknesses.

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Final Thoughts

Adjusting laser focus on the LONGER B1 laser engraver is a simple but essential process for achieving clean engravings and efficient cuts. Using the official focusing block method helps ensure the laser module is positioned at the correct height for optimal performance.

By following the official procedure carefully and checking focus regularly, beginners and experienced users alike can improve engraving precision, reduce cutting issues, and achieve more reliable results on a wide range of projects.

If the cooling fan on your Ray5 laser module is damaged or not functioning properly, replacing it is a straightforward process. Follow the steps below to safely install a new fan and ensure proper cooling performance.

Step-by-Step Instructions

1. Remove the screws
Use a Phillips screwdriver to carefully unscrew and remove the screws securing the fan.

 

2. Disconnect the fan cable
Unplug the fan cable from the mainboard, then remove the old fan from the laser head.

3. Install the new fan
Connect the new fan cable to the mainboard. Install the fan into the laser head, ensuring the intake side faces up and the exhaust side faces down for proper airflow.

4. Secure the fan
Use a Phillips screwdriver to tighten the screws and firmly fix the fan in place.

Conclusion

Replacing the fan on your Ray5 10W or 5W laser module is an essential maintenance task to ensure proper cooling and stable performance. A correctly installed fan helps prevent overheating and extends the lifespan of your laser engraver.

By following the correct installation steps and ensuring the proper airflow direction, you can keep your machine running safely and efficiently. Always make sure the machine is powered off before performing any maintenance.

Cleaning the lens window and nozzle of a laser engraver is an essential and routine maintenance task.
A dirty lens window can severely reduce laser power, causing weak or uneven engraving/cutting.
A clogged nozzle can disrupt the flow of assist air, resulting in poor cutting quality and even potential damage to the laser head due to insufficient cooling.

Below is a detailed and safe cleaning guide.

Core Principles: Safety First!

Power Off and Cool Down:
Always turn off the laser engraver and unplug the power cord before cleaning.
Wait until the laser head is completely cool, especially after recent use when it may still be very hot.

Extreme Gentleness:
Both the lens window and nozzle are delicate and fragile (especially the coating on the lens surface).
Any scratch can cause permanent damage. Handle with care and apply very light pressure during cleaning.

Use Proper Tools:
Prepare professional cleaning tools.
Avoid using paper towels or clothing that can leave fibers or cause scratches.

Part 1: Cleaning the Laser Head Lens Window

The lens window protects the internal mirrors and lenses of the laser module, and it is the most likely component to accumulate smoke and dust.

Required Tools:

Anhydrous alcohol (≥99% purity): Evaporates quickly without leaving water stains.
Avoid medical alcohol, which contains water and other additives.

Lint-free cotton swabs/lens cleaning sticks: With wooden or plastic handles wrapped in microfiber.

Air blower/camera dust blower: For removing large dust particles.

Gloves (optional but recommended): Prevent fingerprints and oil stains.

Cleaning Steps:

1. Remove the Lens Window:

Gently unscrew the lens holder (usually counterclockwise).

Place the lens on a clean, soft surface such as lint-free paper or tissue.

2. Blow Off Dust:

Use the air blower to gently blow both sides of the lens to remove surface dust and particles.
This prevents scratches during wiping.

3. Alcohol Cleaning:

Take a new lint-free swab and apply 1–2 drops of anhydrous alcohol—it should be damp, not dripping.

Start from the center of the lens and gently wipe outward in a spiral motion.
Do not wipe back and forth.

Use a new swab, moistened again with alcohol, to repeat the spiral cleaning for a deeper cleanse.

4. Dry and Inspect:

Use a clean, dry, lint-free swab to absorb any residual alcohol, again moving from center outward.

Hold the lens toward a light source (e.g., phone flashlight) and inspect from multiple angles.
Ensure there are no fingerprints, watermarks, or dust.
If contamination remains, repeat the previous steps.

5. Reinstall the Lens:

Ensure the lens holder is clean (use the air blower if needed).

Carefully reinstall the lens in its original orientation (the coated side usually faces inward—if unsure, refer to its direction before removal).

Screw the retaining ring back securely but not too tightly to avoid cracking the lens.

Part 2: Cleaning the Nozzle

The nozzle directs assist air (or oxygen/nitrogen) to the cutting point, helping to remove molten material and provide cooling.
It often becomes clogged with smoke residue or melted debris.

Required Tools:

Same as those for lens cleaning: anhydrous alcohol and lint-free swabs.

Fine needle, nozzle cleaner, or toothpick (for unclogging small holes).

A small container (for soaking the nozzle).

Cleaning Steps:

1. Remove the Nozzle:

The nozzle is usually threaded under the laser head. Unscrew it counterclockwise.

Be aware that some accumulated dust may fall out.

2. Physical Unclogging:

If the nozzle outlet is blocked by molten debris, use a fine needle or nozzle cleaner to gently clear the hole.
Be very careful not to enlarge or scratch the inner surface—this could affect airflow precision.

For double-layer nozzles, check the gaps between layers for blockage.

3. Soaking and Brushing:

For stubborn oil or residue, soak the nozzle in anhydrous alcohol for 10–15 minutes.

After soaking, use a lint-free swab or a soft brush (like an old toothbrush) to gently clean the inside and outside of the nozzle, especially around the outlet.

4. Rinse and Dry:

Rinse the nozzle again with fresh anhydrous alcohol.

Use the air blower to completely dry both the inside and outside of the nozzle, ensuring no moisture remains.
This is critical, as moisture can affect cutting performance.

5. Reinstall the Nozzle:

Once fully dry, screw the nozzle back into place.
Tighten it securely, but avoid overtightening to prevent thread damage.

Recommended Cleaning Frequency

Daily / Before Each Use:
Use an air blower to remove surface dust from the lens window and nozzle.

Weekly or Every 40 Hours of Operation:
Perform a full visual inspection and clean thoroughly if any contamination is visible.

Clean Immediately If Any of the Following Occur:

Laser power output drops noticeably (cutting depth decreases at the same power).

Engraving/cutting lines become uneven or blurry.

Sparks are unusually large or have strange colors during cutting.

A garlic-like (ozone) smell appears—this may indicate lens contamination causing beam refraction.

Replacing the X-axis or Y-axis motor on your Ray5 laser engraver is a critical maintenance task that ensures smooth motion and precise engraving. This guide provides a detailed, beginner-friendly walkthrough using the Ray5 40W X-axis motor as an example while preserving the original procedures and sequence.

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Table of Contents

• What This Guide Covers
• Quick Answer
• Why This Process Matters
• Before You Start
  • Requirements
  • Precautions
• Step-by-Step Tutorial
• Common Problems and Solutions
• Tips for Better Results
• Frequently Asked Questions
• Final Thoughts

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What This Guide Covers

This tutorial covers the complete replacement process for the X-axis or Y-axis motor on Ray5 10W, 5W, and 40W laser engravers. Topics include:

• Disconnecting and removing the old motor
• Loosening timing belts
• Installing the new motor with proper orientation
• Ensuring correct belt tension
• Testing for smooth operation

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Quick Answer

How to replace a Ray5 X/Y-axis motor:

1. Power off the machine and unplug the motor cable.
2. Loosen the X/Y-axis timing belt.
3. Remove the motor screws using a 2.5 mm hex wrench.
4. Install the new motor, ensure proper connector orientation, seat the timing belt, adjust tension, and reconnect the cable.

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Why This Process Matters

The X-axis and Y-axis motors drive the precise movement of the laser head. If a motor fails or becomes misaligned, engraving accuracy is compromised, leading to uneven cuts or skipped steps. Replacing worn or damaged motors restores reliable motion and ensures professional-quality results.

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Before You Start

Requirements

• Replacement motor compatible with your Ray5 model (10W, 5W, or 40W)
• 2.5 mm hex wrench
• Screwdriver set (optional for cable management)
• Clean, organized workspace
• Anti-static gloves (optional)

Precautions

• Always power off and unplug the machine before beginning.
• Handle connectors and wires carefully to avoid damage.
• Keep screws and small parts organized for easy reassembly.
• Follow official machine specifications or instructions for belt tension and motor placement.

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Step-by-Step Tutorial

Note: The following steps use the Ray5 40W X-axis motor as an example. The procedure is identical for other motors and models.

Step 1: Unplug the X/Y-axis motor cable

• Action: Ensure the machine is powered off. Carefully unplug the motor cable to avoid damaging the connector or wiring.
• Expected Result: Motor is electrically disconnected and ready for removal.
• Notes: Pull from the connector, not the wires, to prevent damage.

 

Step 2: Loosen the X/Y-axis timing belt

• Action: Release the tension on the timing belt before removing the motor.
• Expected Result: Reduced resistance, making motor removal easier.
• Notes: This step prevents strain on the motor and mechanical components.

 

Step 3: Use a 2.5 mm hex wrench to loosen the four screws and remove the X/Y-axis motor

• Action: Unscrew all four mounting screws and gently detach the motor from the frame. Keep the screws in a safe place for reuse.
• Expected Result: Old motor is fully removed from the machine.
• Notes: Avoid dropping screws or misplacing them.

 

Step 4: Install the new motor

• Action: Place the new motor in the correct position. The X-axis motor connector should face left, and the Y-axis motor connector should face backward. Ensure the timing belt is properly seated on the coupling and adjusted to the correct tension. Reconnect the motor cable.
• Expected Result: Motor is securely installed, oriented correctly, and connected.
• Notes: Improper orientation or belt tension can cause skipping or inaccurate engraving.

Motor replacement is complete.

Common Problems and Solutions

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Tips for Better Results

• Take photos of the motor area before disassembly to guide reassembly.
• Keep all screws and small parts in a labeled container.
• Test motor movement at low speed before performing a full engraving.
• Regularly clean the timing belt and coupling to maintain smooth motion.
• Always handle electrical connectors with care to prevent shorts or damage.

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Frequently Asked Questions

1. Can I replace the motor on a 10W or 5W Ray5 using this tutorial?
Yes, the process is identical for X-axis or Y-axis motors across all Ray5 models.

2. How do I know if my motor needs replacement?
Symptoms include skipped steps, unusual noises, vibration, or inconsistent engraving.

3. What tools do I need for this replacement?
A 2.5 mm hex wrench is required. A screwdriver and anti-static gloves are optional.

4. Can I perform this replacement without experience?
Yes, following this step-by-step guide and safety precautions ensures a smooth replacement.

5. How should I adjust belt tension after installation?
Follow official machine specifications. The belt should be snug but not overly tight.

6. What if the motor connector is facing the wrong direction?
Reinstall the motor with the correct orientation: X-axis connector faces left, Y-axis connector faces backward.

7. How long does this replacement take?
For beginners, approximately 30–60 minutes, including disassembly, installation, and testing.

8. Can misaligned motors damage the machine?
Yes, improper alignment or tension can lead to uneven engraving and wear on components.

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Final Thoughts

Replacing the X-axis or Y-axis motor on your Ray5 10W, 5W, or 40W laser engraver is a straightforward process when following proper procedures. Correct installation, orientation, and belt tension are critical for stable and precise operation. Always power off and unplug your machine before performing maintenance, and follow official specifications to ensure long-term reliability. With careful attention, motor replacement will restore smooth motion and professional-quality engraving results.