System Image Flashing

System Image Flashing

System Introduction

FlyOS-Fast is a lightweight Linux system deeply customized for 3D printing, supporting all Mellow 3D printer mainboard platforms. Its features include:

• Fast boot speed, kernel optimization ensures Klipper's real-time performance
• File system optimization reduces the risk of boot failure caused by power loss
• KlipperScreen starts in 30 seconds
• Pre-installed services including Klipper, RRF, Mainsail, Fluidd, Moonraker, KlipperScreen, etc.
• Supports switching between Klipper and RRF systems
• Supports one-click switching between Mainsail and Fluidd online
• Supports USB printing, power failure recovery, serial screens
• Supports automatic firmware flashing on boot (for fly-c8, fly-geminiv3)
• Allows pre-setting default language and printer name for front-end UIs like Fluidd

For more OEM customization features (such as boot logo, preset configuration files, hiding Mainsail tabs, etc.), please contact us.

Note

This system is a lightweight customized system. The built-in components and services such as klipper are not official original versions and do not support user modifications or upgrades.

• FLYOS-FAST system account is root, password is mellow

Preparation Before System Flashing

1. Prepare required equipment

   • If using a TF card to boot the system, prepare the following equipment:
     • Card reader
     • One TF card with capacity between 16GB-128GB, transmission speed Class10 or above
     • It is recommended to use TF cards from well-known brands such as SanDisk, Samsung, Kioxia, etc. DO NOT use unbranded TF cards!
     • A Windows system computer (Windows 7, 10, or 11 are all acceptable)

2. Download FLY-H3 system image:

   • The current FAST version is FlyOS-FAST-V1.2.47
   • Please download the FLY-H3 image within the FlyOS-FAST-V1.2.47 folder
   • Click the download link below
   • Loading...
   tip

   • System file naming convention: FlyOS-Fast-[chip series]-[version number].img, for example: FlyOS-Fast-H3-v1.0.0.img
   • Windows system users download .exe files, which are self-extracting 7z compressed packages. After downloading, double-click to extract and obtain the .img file (can only be decompressed on a Windows system)
   • For other systems like macOS and Linux, download the .7z file, which is a 7z compressed package. After downloading, use tools that support the 7z format to extract and obtain the .img file
   • Due to the large system file size, other compression formats and source image downloads are not available for now
   • This tutorial uses .exe and Google Drive as examples
   • Access the cloud drive and click on FlyOS-FAST-V1.2.47
   
   • Click on the image you need to download
   • This tutorial requires downloading Fly_FAST-H3.exe
   
   • Click "Download Anyway"
   

3. Extract the system image file to obtain the .img file.

   • Double-click or right-click to open FlyOS-Fast-H3.exe, after a few seconds a window like the following will pop up (if the system warns about security, click "More info" -> "Run")
   • You can choose the extraction directory, then click the Extract button and wait for the extraction to complete.
   
   • After extraction, a file named FlyOS-Fast-H3-vx.x.x.img will be generated in the extraction directory. x.x.x represents the system version number.

4. Install the device to be flashed on the computer

Flashing the System

1. Open Rufus, select the device. The displayed capacity should match the capacity of the inserted flash card.

   

2. Select Boot selection, by default choose Image file.

3. To select the image file, click the Select button to the right of Boot selection, and choose the extracted .img file.

4. After selecting the image file, Boot selection will display the filename of the image.

   

5. Click the Start button. If a window pops up prompting that the disk data needs to be cleared, click OK.

   

6. Once flashing is complete, the computer will emit a prompt sound and the progress bar will show Ready.

   

7. Do not rush to remove the flash card after flashing is complete.

8. Open File Explorer and check if there is a USB drive or removable disk named FlyOS-Conf.

   

9. Open FlyOS-Conf. If the two files shown in the image below exist, the flashing was successful.

   

10. Install the system card onto the motherboard.

Install System Card

• After flashing the system to the TF card, you need to connect the TF card to the back of the MINI PAD here; otherwise, the system cannot boot

Install Antenna

1. Install the antenna properly

warning

• Please note that the host computer does not support WiFi with Chinese names and does not support 5G WiFi

• The red arrow indicates the WiFi antenna interface
• The WiFi antenna port is ipex1
• Please install the antenna; otherwise, poor signal may prevent connecting to the router

tip

• After installing the system card, proceed to the next step and connect to the host via SSH

2. Power the host computer.
   At this point, your host computer is ready to boot up!!!
   Please proceed to the next step: SSH Connect to Host

Modifying Other System Configuration Options

To modify other system configuration options, please refer to: Modifying System Configuration