Lasergravierer-Blog

Solve issues such as engraving misalignment, warped lines, and open (incomplete) circles.
Solve issues such as engraving misalignment, warped lines, and open (incomplete) circles.

1. Adjust the eccentric nut to ensure smooth and stable movement of the parts. 

2. Re-tighten the timing belt. 

3. Adjust the position of the timing pulley to prevent friction between the timing belt and the

pulley. 

4. Check for loose screws on the X-axis timing pulley, as well as the couplings and pulleys on the

Y-axis. 

In LightBurn software settings, the Advanced-Overcut parameter is set to 0.3 mm.

By Lasergravierer-Blog | November 24, 2025
How to Troubleshoot Touchscreen Black/White Screen Issues on Your Laser Engraver

Experiencing a black or white screen on your touchscreen panel can be frustrating, but the good news is that most issues can be diagnosed—and often resolved—through a structured step-by-step approach.
This guide walks you through three stages of troubleshooting, from simple checks to deeper hardware diagnostics.

Stage 1: Quick and Basic Checks

1. Verify Power Supply

  • Check the power adapter: Ensure the adapter’s indicator light is green.

  • Confirm power switches: Make sure both the main power switch and the emergency stop switch are turned ON.

  • Observe LEDs: Look at the controller box or mainboard to check if any status or power LEDs are illuminated.

    • If the adapter is green but the machine shows no lights at all, the problem may be in the controller box.

2. Perform a Full Restart

Completely shut down the machine, unplug the power cable, wait 1–2 minutes, then reconnect and restart.
This helps resolve temporary system freezes or UI boot issues.

3. Check Screen Brightness (for dark screens with backlight on)

Some touchscreens have independent brightness controls.
If the screen looks “black” but still emits backlight, try adjusting the brightness through the touchscreen’s internal settings.

4. Consider Auto Sleep Mode

Many touchscreens include auto-sleep/auto-dimming features.
If the screen is blank after idle time but the machine still works, tap the screen or restart to wake it.

5. Listen for Startup Sounds

Check whether the mainboard or controller emits any boot-up beeps or activity noises.

  • If yes → The system may be functioning, but the screen or its connection may be faulty.

  • If silent, the issue may lie in the mainboard or power distribution.

Stage 2: Internal Cable and Hardware Checks

⚠ Important: Before starting this stage, ensure the machine is fully powered off and the power cable is unplugged. Safety first!

1. Inspect the Touchscreen Cable

Most laser engravers use a ribbon cable or FPC cable.

Steps:

  • Open the controller box or the touchscreen housing to locate the cable connecting the touchscreen to the mainboard.

  • Reconnect both ends:

    • Gently disconnect the cable from both the screen and the mainboard.

    • Inspect for bent pins or loose connectors.

    • Clean the gold contacts with a rubber eraser or dry cloth.

    • Reinsert firmly and lock the latch.

2. Check for Cable Damage

Look for:

  • Creases

  • Crushed sections

  • Burn marks

  • Broken copper traces

Any visible damage means the cable should be replaced.

3. Test Using the Replacement Method (Most Effective)

  • Option A: Swap in a known working touchscreen
    If the replacement works, then the original touchscreen is faulty.

  • Option B: Connect the problematic touchscreen to a known working machine
    If the issue persists, the touchscreen is confirmed defective.

Stage 3: Identify Core Component Failures

If none of the previous steps resolve the issue, the problem is likely within the core modules.

1. Touchscreen Hardware Failure

A very common cause.

Symptoms:

  • Screen permanently black or white

  • No boot logo or flickering

  • No response despite cable replacement

Causes may include aging, vibration, unstable voltage, or manufacturing defects.

Diagnosis:

  • Confirmed via replacement test in Stage 2.

2. Mainboard/Control Board Failure

The display output circuit on the mainboard may be damaged.

How to judge:

  • If the machine can still move axes, the laser fires, and the LEDs respond normally:
    → The mainboard is likely fine; the issue is with the touchscreen or cable.

  • If the entire machine is unresponsive, with no lights or movement:
    → The mainboard or power distribution system may be faulty.

Final Notes

By following this structured approach—from basic checks to full hardware verification—you can quickly narrow down the root cause of touchscreen display issues. If you identify a defective screen, cable, or mainboard, contact customer support with your findings for a faster resolution.

By Lasergravierer-Blog | November 24, 2025
Ray5 Series Firmware Upgrade
Ray5 Series Firmware Upgrade

The bug has been fixed and will no longer occur after upgrading to the latest firmware.

The firmware of RAY5 is continuously updated to fix bugs and add new features. The firmware upgrade operations are different for different systems. The detailed tutorial about firmware upgrading is contained in the firmware package. Please download the RAY5 firmware package from the LONGER official website: RAY5 firmware downIoad

Install the MKSLaserTool-setup V1.1.2.exe file, click MKS ESP32 Download Tool, select the right port and .bin update firmware, and click Start. It will prompt "firmware successfully flashed" after the update is completed.

Copy the dic-cfg.txt file from the configuration folder to the root directory of the SD card, insert the SD card into the main board of the engraver, and restart the engraver, and the configuration file update will be completed automatically.

By Lasergravierer-Blog | November 24, 2025
Adjusting Camera Brightness — Nano Duo
Adjusting Camera Brightness — Nano Duo
By Lasergravierer-Blog | November 17, 2025
Camera Vision Correction for Framing — Nano Duo
Camera Vision Correction for Framing — Nano Duo

Vision Correction Function

Before using the visual function of the frame machine, you must complete a visual alignment process. First, mark the patterns ①②③④ on the engraving target, then take a photo with the camera, and sequentially mark these points on the image in order. Before starting, ensure that no other program is using the frame machines camera.

Precautions Before Operation

Place the engraving paper in the working area. Recommended scale value: 95.

When performing the visual calibration function, ensure that no other cameras are connected and that the machines camera is not in use.

During visual calibration, do not move the machine or engraving paper, and ensure that all steps are completed in a single session.

Each marker pattern supports only a single calibration. To perform visual calibration again, you need to engrave a new marker pattern.

Before performing visual calibration, always reset the machine to prevent it from colliding with the frame during engraving.

Ensure that the camera lens is perpendicular to the surface of the engraving object to prevent calibration deviations caused by angled views (use a spirit level).

Adjust the camera to a working distance of 550 mm from the surface of the engraving object to ensure the field of view fully covers the entire machine.

Ensure the surface of the engraving object is level to prevent calibration deviations caused by unevenness.

Ensure the bracket is positioned at the center of the machines front crossbeam.

Precautions for the Longer B1 Machine

When using the Longer B1 machine, adjust the canvas size to 430 mm × 430 mm

Modification method:

1. Click on the Serial Log

2. Enter $130=430 and $131=430 separately in the input box. After entering, send $130 and $131 until you see the Canvas update.

Engraving Mark Patterns

You will use your laser to engrave the target pattern on a piece of material and mark the center of the target.

Step 1

After connecting the frame machine, click the camera icon in the menu bar to enter the visual calibration page.

Before entering the visual calibration page, scale and move the canvas aside so that the entire canvas can be fully viewed when the visual function page opens.

Step 2

Enter appropriate speed and power settings to achieve moderate engraving without burning through. Adjust the scale value up or down so that the canvas can accommodate the marker pattern.

Step 3

Click the border preview button to display the marker pattern on the canvas without exceeding the canvas size.

Note: After modifying parameters such as speed, power, or scale, be sure to click the “Border Preview” button again to synchronize the marker pattern on the canvas.

Step 4

Start engraving. If the pattern is not clear enough, you can adjust the settings and run it again. Once the pattern is clearly visible and easy to view, click Next.

Capture Target Mark Image

During this process, you will capture the alignment image. You may need to wait a few seconds on this screen for the camera to successfully capture it.

When the machine’s camera is detected, click the Capture button. You should see the camera view displayed in the lower-left corner of the window, with all four target points visible. The captured image appears on the right, as shown. Click Next once all four target points are clearly visible in the captured image.

Mark the Target

In this step, you need to mark each target by double-clicking the center of each target in sequence.

Hold the spacebar to move the image with the mouse, and use the scroll wheel to zoom in or out to ensure precise clicking on the center. A red marker will appear each time you double-click. If a marker is placed incorrectly, click Undo Markerto delete it and try again. Double-clicks must follow the order indicated on the marker pattern (1, 2, 3, 4). Once all four target points are marked, click Finishto complete the process.

By Lasergravierer-Blog | November 13, 2025
Z-Axis Metal Plate Replacement — Nano Duo
Z-Axis Metal Plate Replacement — Nano Duo

In the Nano Duo, the metal plate in the middle is designed to be thin to allow the L-shaped support frame to fit tightly against the column. However, the thin metal plate is prone to creasing when subjected to external pressure.
If the metal plate is creased, it can be replaced by following these steps:

1. Rotate the hand-tightening nut counterclockwise to remove the L-shaped support frame.

2. Use a hex wrench to remove the 4 screws shown in the figure and take off the toothed connector.

3. Remove the positioning pieces at the top and bottom of the column and take out the damaged metal plate.

4. Place the new metal plate in position and reinstall the positioning pieces at the top and bottom of the column as shown in the figure.

5. Use the hex wrench to tighten the screws to secure the toothed connector, then reinstall the L-shaped support frame. The metal plate replacement is now complete.

By Lasergravierer-Blog | November 13, 2025
How to Trace Wavy Borders on Nano Duo
How to Trace Wavy Borders on Nano Duo

If wavy traces appear during border tracing, this issue is caused by the old firmware. You can resolve it by updating the firmware.

Step-by-step instructions:

1. Download the latest firmware from the official website and save it to the SD card.
Turn on the machine and insert the SD card into the slot on the side of the machine. When an upward arrow and the word “SD” appear on the main interface, it means the file has been successfully read.

2. On the main interface, tap the “Settings” option to enter the settings screen, which includes basic settings such as network, language, etc.

3. Tap the “Firmware update” option to enter the upgrade screen, then tap the upward arrow button to start the component upgrade.

4. “Screen” represents the screen component upgrade, “Galvo” represents the galvo component upgrade, and “Main Control” represents the main control component upgrade. Select the component you want to upgrade to proceed.

Note: When there are no new firmware components on the SD card, the screen will display “Retrieval failed.”

By Lasergravierer-Blog | November 13, 2025
How to Switch Between Red and Blue Lasers on Nano Duo Using the Screen
How to Switch Between Red and Blue Lasers on Nano Duo Using the Screen

Nano DUO is equipped with a built-in screen that allows for basic operations. The steps to switch between red and blue laser engraving are as follows:

1. Tap File scanning and select the desired engraving file.
Note: Make sure the SD card is inserted into the slot.

2. In Light Source, tap the dropdown menu and select:
450 nm [Blue Laser] or 1064nm [Infrared Laser]

Note: Only files generated by LightBurn and LaserGRBL support red and blue laser switching. Since LaserBurn integrates commands that enable simultaneous dual-laser engraving into the *.gc file, the light source cannot be changed through the screen.

By Lasergravierer-Blog | November 13, 2025
How to Control the LED Light on Nano Duo
How to Control the LED Light on Nano Duo

1. LightBurn
After successfully connecting to Nano DUO, enter the following commands in the console input box and press Enter to send:
$nano/led=off Turn off LED
$nano/led=on Turn on LED

2. LaserGRBL
After successfully connecting to Nano DUO, enter the following commands in the console input box and press Enter to send:
$nano/led=off Turn off LED
$nano/led=on Turn on LED

3. LaserBurn PC

On the control page, click Engraving, and you can directly control the LED light using the LED Light button.

As shown in the right image below, click the top menu button, enter the command in the input window, and click Send to send:
$nano/led=off Turn off LED
$nano/led=on Turn on LED

By Lasergravierer-Blog | November 13, 2025
How to Fix Engraving Lag on Nano Duo
How to Fix Engraving Lag on Nano Duo

Nano DUO is a high-speed engraving machine, and sometimes engraving lag may occur when the data transmission speed is slower than the engraving speed. To prevent lag, you can apply the following settings:
Note: Engraving via SD card will not experience lag.

1. LightBurn
Click the button in the top menu bar, enable the Enable GCode Clustering option, and click OK.

2. LaserBurn PC
Click the button in the top menu bar to open the Machine Settings interface, enable the Enable GCode Clustering option, and click Save.

By Lasergravierer-Blog | November 13, 2025