While not a "firmware update" in the traditional Marlin sense, many T3 users are bypassing Sunlu’s firmware entirely by flashing Klipper.
Klipper runs on a Raspberry Pi (or old PC) and leaves the T3’s motherboard as a dumb motion controller. This allows for input shaping (printing faster with no ringing) and a web interface.
To flash Klipper on T3:
Final tip: If your T3 is working perfectly and you don’t have a specific bug, a firmware update is optional. However, if you’re adding hardware or experiencing crashes, updating is a good first step. Always verify your board revision first.
It was a typical Monday morning for John, a tech enthusiast who spent most of his free time tinkering with gadgets and devices. As he sipped his coffee, he received a notification on his phone about a new firmware update for his Sunlu T3 3D printer. The update promised to improve the printer's performance, fix some bugs, and add new features.
John's curiosity was piqued, and he quickly logged into his Sunlu account to learn more about the update. After reading through the changelog, he decided it was worth updating. He downloaded the firmware file and prepared his T3 for the update.
As he began the update process, John's mind wandered back to the day he first unboxed his Sunlu T3. He had been impressed by its sturdy build and user-friendly interface. Over time, he had grown to appreciate the printer's reliability and accuracy. However, like any device, it wasn't perfect, and John had encountered some issues with print quality and filament compatibility.
The update process was straightforward, and John followed the on-screen instructions carefully. The printer's screen flickered as it rebooted, and the progress bar moved steadily. Twenty minutes later, the update was complete, and the T3 restarted.
John was eager to test the updated firmware. He loaded a new print job, a intricate vase design he had been meaning to try out for weeks. As the printer sprang to life, John noticed an immediate difference. The print head moved with increased precision, and the extruder seemed to be applying the filament more smoothly.
The print quality was noticeably improved, with fewer stringing issues and a more even finish. John was impressed by the update's impact on the printer's performance. He spent the next few hours experimenting with different print settings and materials, pushing the T3 to its limits.
As the day went on, John discovered that the update had also addressed some of the issues he had been experiencing with filament compatibility. The T3 was now able to handle a wider range of filaments, including some specialty materials he had been wanting to try.
The update had also brought some new features, such as improved support for calibration and a more intuitive interface for adjusting print settings. John appreciated the attention to detail from the Sunlu team, who had clearly listened to user feedback and made a concerted effort to address common pain points.
As the sun began to set, John reflected on the update's impact on his printing experience. The Sunlu T3 had always been a reliable workhorse, but the firmware update had elevated it to a new level. He was excited to see what other improvements the future held for his trusty 3D printer and the Sunlu team.
From that day on, John continued to push the boundaries of what was possible with his Sunlu T3, exploring new materials, techniques, and projects. The update had breathed new life into his printing endeavors, and he was grateful for the opportunity to take his creations to the next level.
Upgrading the firmware on your (often marketed as the "Terminator") is a common way to unlock newer features, fix recurring bugs like "Jam Detection" false positives, or transition to a fully custom Marlin environment. The
is widely considered an Ender 3 Pro clone and utilizes a modified BTT SKR Mini E3 V2 Go to product viewer dialog for this item. motherboard with TMC2209 stepper drivers. Essential Pre-Update Checklist Before starting, ensure you have the following:
A backup of your original firmware files if possible, as official downloads can sometimes be hard to locate.
A FAT32-formatted microSD card (ideally 8GB or smaller for better compatibility). The correct firmware file, usually named firmware.bin. Official vs. Custom Firmware Options You have two primary paths when updating your T3: 1. Official Sunlu Firmware Custom Firmware for SUNLU T3 by Kaot93 - Printables.com
Updating the firmware on a Sunlu T3 (also known as the "Terminator 3") is often a necessary step for enthusiasts because the stock firmware has several known limitations, including fan mapping errors and disabled PID tuning for the bed. The T3 is essentially a modified Ender 3 clone using a 32-bit board similar to the BTT SKR Mini E3 V2. Available Firmware Options
Depending on your comfort level with tinkering, you have three primary paths:
Official Sunlu Firmware: Official updates are hosted on the Sunlu Website or shared via their Official Facebook Page. Version 3.40 is a common stable target for official users.
Community Custom Firmware: Developers have released optimized Marlin versions that fix bugs found in the original code, such as incorrect extruder fan mapping where the fan only ran when motors were active rather than when the hotend was hot. You can find these on GitHub and Printables.
Self-Compiled Marlin: Since the T3 uses a standard architecture, you can compile your own firmware using the Marlin Configurations repository for the Sunlu T3, allowing for features like 5x5 grid bed leveling and higher hotend temperatures (up to 285°C) if you have an all-metal hotend. Installation Procedure
The T3 updates via a microSD card inserted directly into the motherboard slot at the front of the printer. Sunlu T3 Firmware Update
Format the Card: Use a microSD card formatted to FAT32 with an allocation unit size of 4096.
Prepare the File: Copy the .bin firmware file to the root directory of the card. Ensure it is the only .bin file present. Flash the Printer: Turn off the printer. Insert the microSD card. Power on the printer.
The screen will remain blank for several seconds while the light on the motherboard flashes. Once the main menu appears, the update is complete.
Post-Update Reset: It is highly recommended to select "Restore Defaults" and then "Store Settings" (EEPROM) after flashing to ensure old settings do not conflict with the new firmware. Key Improvements in Updated/Custom Firmware
Fixed Fan Control: Corrects the error where the hotend cooling fan fails to turn on during stationary heating.
PID Bed Tuning: Enables more stable bed temperatures, which Sunlu curiously left disabled in many stock versions.
Enhanced Leveling: Expands the Automatic Bed Leveling (ABL) to a more precise 5x5 grid.
Thermal Safety: Custom versions often include refined thermal runaway protection and higher temperature limits for upgraded hardware. Troubleshooting Common Issues sunlu 3d - Facebook
Sunlu T3 Firmware Update: A Comprehensive Guide
The Sunlu T3 is a popular 3D printer known for its high-quality prints, ease of use, and affordability. Like any other electronic device, the Sunlu T3 requires periodic firmware updates to ensure optimal performance, fix bugs, and add new features. In this write-up, we will guide you through the process of updating the firmware on your Sunlu T3 3D printer.
Why Update the Firmware?
Updating the firmware on your Sunlu T3 3D printer is essential to:
Preparation
Before updating the firmware on your Sunlu T3, make sure you:
Downloading the Firmware Update
To download the firmware update for your Sunlu T3:
Updating the Firmware
To update the firmware on your Sunlu T3:
Using the Sunlu Firmware Update Tool
If you are using the Sunlu-provided firmware update tool:
Using Arduino IDE
If you are using Arduino IDE:
Post-Update Checklist
After updating the firmware:
Troubleshooting
If you encounter any issues during the firmware update process:
Sunlu T3 Firmware Update: What You Need to Know
The Sunlu T3 is a popular 3D printer known for its reliability and high-quality prints. To keep it running at its best, the manufacturer occasionally releases firmware updates that improve performance, fix bugs, and add new features. In this article, we'll guide you through the process of updating your Sunlu T3 firmware and highlight what you can expect from the latest version.
Why Update Your Sunlu T3 Firmware?
Updating your Sunlu T3 firmware can bring several benefits, including:
How to Update Your Sunlu T3 Firmware
Updating your Sunlu T3 firmware is a relatively straightforward process. Here's a step-by-step guide:
Latest Sunlu T3 Firmware Version
The latest firmware version available for the Sunlu T3 is [insert version number]. This update includes [list of changes, e.g., improved print quality, new filament support, bug fixes].
Changelog
Here's a summary of the changes included in the latest firmware update:
Tips and Precautions
Before updating your Sunlu T3 firmware, make sure to:
By keeping your Sunlu T3 firmware up to date, you can ensure that your printer continues to perform at its best and take advantage of new features and improvements.
This report outlines the procedures, benefits, and risks associated with updating the firmware on the
(Terminator) 3D printer. The Sunlu T3 is equipped with a 32-bit motherboard, typically a modified version of the BigTreeTech SKR Mini E3 V2 Update Overview
Updating firmware on the Sunlu T3 can improve performance, fix factory bugs, and unlock features like increased hotend temperatures or optimized bed leveling. Official Version v3.40 (released Oct 2022) Firmware Type Marlin 2.0 Primary Method microSD Card (Auto-update on boot) Key Hardware STM32F103 MCU (32-bit) Preparation & Requirements Before beginning, ensure you have the following: MicroSD Card: Must be formatted to with a small allocation size (e.g., 4096 bytes). Firmware File: file named exactly firmware.bin for official/custom Marlin, or specifically configured for Official Downloads: Available via the Sunlu Support Page (v3.40 is the latest stable official release). Update Procedure (SD Card Method) Obtain the correct file for your specific machine version. Ensure the microSD card is clean and formatted to FAT32. Copy the file to the root of the SD card and rename it to firmware.bin Turn off the printer. Insert the SD card into the printer's slot.
Turn on the printer. The screen may remain blank for 10–30 seconds while the update installs.
Once the UI loads, check the "About Printer" or "Info" menu to confirm the new version number. Critical Considerations & Known Issues klipper/config/printer-sunlu-t3-2022.cfg at master - GitHub
Sunlu T3 (Terminator 3) firmware "draft feature" typically refers to the Fast Mode (or F/N Mode), a core selling point that enables print speeds up to 250mm/s. Key Feature: Fast Mode (F/N)
This feature allows for rapid prototyping by overriding standard G-code settings directly through the printer's interface. While not a "firmware update" in the traditional
Functionality: It can be toggled in the printer's menu during a print. It works by significantly increasing acceleration and jerk settings.
Drawbacks: Users often report a sharp decline in print quality, including misaligned layers, holes, and visible "ringing" or ghosting.
Optimization Tip: To maintain better quality while printing fast, it is often recommended to manually increase the nozzle temperature by approximately 10°C to ensure the filament melts quickly enough for the high-speed extrusion. Updating the Firmware
Updating to the latest version (such as v3.40 or newer) can help resolve bugs in related features like jam detection and power loss recovery. Custom Firmware for SUNLU T3 by Kaot93 - Printables.com
Updating the firmware on your is a straightforward process that uses an SD card to flash the printer's 32-bit motherboard. The T3 is often considered an Ender 3 clone and uses a motherboard similar to the SKR E3 Mini V2. 1. Preparation
Before starting, ensure you have a standard microSD card (8GB to 32GB is ideal) formatted to
: Save your existing configuration or EEPROM settings if possible. Check Hardware
: Note your current firmware version in the printer's "About" menu to confirm the update later. 2. Download Firmware
You can obtain the firmware from official or community sources: Official Website : Download the latest Sunlu T3 32-bit Firmware (e.g., version 3.40 or newer) from the Official Sunlu Download Page Community/Custom
: For advanced features like 5x5 Bed Leveling or higher nozzle temperatures (up to 285°C), you can use custom Marlin builds from sites like Printables
: If you are switching to Klipper, a configuration file is available on 3. Update Procedure
Updating the firmware on a Sunlu T3 (also known as the "Terminator") is a common procedure used to resolve issues like z-axis squashing, enabling PID tuning, or adding advanced Marlin features. The Sunlu T3 uses a 32-bit controller board that is largely a clone of the BigTreeTech SKR Mini E3 V2, which makes it highly compatible with standard Marlin firmware. Finding the Firmware
You can choose between official stock firmware or community-modified versions depending on your needs:
Official Stock Firmware: Sunlu provides firmware files on their official website or through their Official Facebook Support. Version v3.43 is a notable overseas release that supports both Chinese and English.
Custom Community Firmware: Many users prefer custom builds to unlock features like 5x5 Automatic Bed Leveling (ABL) or higher hotend temperatures (up to 285°C). Popular community sources include:
Kaot93's Custom Firmware: Available on Printables, this build improves bed tramming and filament runout detection.
Anson Liu’s Marlin Configuration: For users who want to compile their own, Anson Liu provides a Marlin 2.0 configuration that fixes bugs like the extruder cooling fan being misassigned.
GitHub Archives: General archives of the official firmware can also be found on GitHub for developer use. Update Procedure (SD Card Method)
The Sunlu T3 features a bootloader that allows for easy updates via the microSD card slot. SUNLU T3 Marlin Configuration and Controller Board Pictures
Here’s a structured, solid article on updating the Sunlu T3 firmware. You can use this directly on a blog, wiki, or forum.
The Sunlu T3 is a popular entry‑level 3D printer known for its reliability and ease of use. However, like any modern printer, keeping its firmware up to date is essential for accessing new features, fixing bugs, and improving print quality. This guide walks you through the entire process safely and effectively.
Do not use the SD card you print from—it is likely fragmented or has bad sectors. Use a fresh 8GB or 16GB SD card formatted to FAT32 with a 4096-byte allocation unit size.
Before updating, you need to know what version you are currently running to see if an update is necessary. Final tip: If your T3 is working perfectly