Sunlu T3 Firmware — Update Better
Insert the prepared microSD card into the printer's card slot. Flip the power switch .
Stock firmware often uses basic acceleration algorithms. Updating to an optimized version of Marlin or migrating to Klipper introduces advanced motion control. Features like (Marlin) or Pressure Advance (Klipper) regulate filament pressure during speed transitions. This eliminates bloated corners and reduces stringing at high speeds. 2. Improved Bed Leveling Precision
The official firmware is designed for a "set and forget" experience. However, community feedback on specific versions is mixed:
Unequivocally, .
Rename the file to something simple and unique, such as update123.bin . (The motherboard will ignore the file if it has the exact same name as the previously flashed firmware). Step 3: Flash the Printer Power down your Sunlu T3 completely. Insert the MicroSD card into the printer's card slot. Turn on the power switch. sunlu t3 firmware update better
If you choose to stick with Marlin but want an optimized, upgraded experience, follow this general framework to flash your board. Step 1: Identify Your Motherboard
A: Reformat the card. The card must be 8GB or less, FAT32, with a Master Boot Record (MBR). Rename the file to something short like 1.bin . The bootloader is case-sensitive; ensure all lowercase.
While the T3 uses standalone TMC2208 or A4988 drivers depending on the board revision, the new firmware activates a "Hybrid Threshold." At low speeds (under 50mm/s), the motors run in quiet, stealthChop mode. At high speeds, they switch to spreadCycle for torque.
: Custom builds often move from basic leveling to a more precise 5x5 point grid for Auto Bed Leveling (ABL). Insert the prepared microSD card into the printer's
When choosing a firmware update path for your Sunlu T3, you have two primary options: Marlin (Updated) Only the printer Printer + Raspberry Pi/Host Computer Configuration Style Edit text files and recompile Real-time edits via web browser Interface On-board LCD screen Web interface (Fluidd/Mainsail) Speed Potential Moderate improvement Maximum hardware capability
: Through firmware updates, new features can be added to the Sunlu T3, extending its capabilities. This could include support for new types of filaments, enhancements to the user interface, or the addition of networking capabilities for easier remote management.
: Note your current Z-offset and E-steps values, as these will likely reset after the update. How to Update Your Firmware Sunlu S8: How to Update the Firmware
After updating, use these community-vetted settings to maximize the T3's "Fast Print" capabilities: Updating to an optimized version of Marlin or
The Sunlu T3 made waves as an affordable, high-speed 3D printer equipped with "Fast Print" algorithms. However, out-of-the-box factory firmware often leaves performance on the table. If you want better print quality, fewer glitches, and advanced feature access, upgrading your Sunlu T3 firmware is the single best optimization you can make.
SUNLU occasionally releases updates like v3.40, which focuses on language support and LCD refresh rates. You can check for official support on the sunlu 3d Facebook page . Note: If your printer is stable on v3.31, some users suggest staying there, as v3.40 has reported heating sensor bugs for some units.
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When deciding to update, you have two primary paths. Your choice depends on your technical comfort level and whether you own extra hardware.