1. Product Overview
The SUNLU Terminator T3 is a high-speed FDM 3D printer designed for efficient and precise printing. It features a print speed of up to 250mm/s, a 16-point auto-leveling system, clog detection, and a silent motherboard for quiet operation. The printer is equipped with a metal double gear extruder and a magnetic build plate, supporting various filament types.

Image: The SUNLU Terminator T3 FDM 3D Printer, showcasing its overall design and build volume.
2. Setup Instructions
2.1 Unboxing and Initial Inspection
Carefully unpack the printer from its packaging. Remove all foam inserts and protective materials. Verify that all accessories listed in the packing list are present and undamaged. The printer is 95% pre-assembled for quick setup.
2.2 Assembly
The assembly process involves a few simple steps:
- Attach the Gantry: Align the gantry with the base and secure it using the provided screws.
- Install the Power Supply: Mount the power supply unit to the designated location on the printer frame.
- Mount the Filament Rack: Assemble the filament rack and attach it to the top left corner of the gantry.
- Connect Cables: Ensure all cables are securely connected according to the diagram in the quick start guide.

Image: Visual guide illustrating the three main assembly steps for the SUNLU Terminator T3 printer.
Video: An official assembly tutorial for the SUNLU Terminator 3D Printer, demonstrating the step-by-step setup process.
3. Operating Instructions
3.1 Power On and Initial Setup
Connect the power cable to the printer and a suitable power outlet. Turn on the printer using the power switch. The LCD screen will display the SUNLU logo and then the main interface.
Video: A general overview of the SUNLU Terminator 3D Printer in operation, highlighting its features and capabilities.
3.2 Auto-Leveling
The printer features a 16-point intelligent auto-leveling system. Initiate the auto-leveling function from the printer's menu. This process automatically compensates for any unevenness on the heated bed, improving print accuracy and simplifying preparation.

Image: Diagram illustrating the 16-point auto-leveling process, showing the nozzle probing the print bed at multiple locations.
3.3 Loading Filament
The upgraded twin-gear metal extruder provides strong and precise filament control. Insert the filament into the extruder's input port and feed it until it exits the nozzle. Ensure the filament is properly seated for consistent extrusion.

Image: Close-up view of the metal double gear extruder, highlighting its robust design for reliable filament feeding.
3.4 Printing Process
The SUNLU Terminator T3 supports high-speed printing up to 250mm/s, significantly reducing print times. Prepare your 3D model using slicing software and transfer the G-code file to the printer via SD card or USB. Select the file from the menu to begin printing.

Image: Comparison showing the difference in printing speed between a common 50mm/s printer and the Terminator T3 at 250mm/s.
3.5 Clog Detection and Resume Printing
The printer can detect clogs during operation. If a clog is detected, the printer will pause and enter standby mode. After clearing the clog, you can resume the printing process from where it left off, preventing material waste and print failures.

Image: Flowchart illustrating the clog detection process: Clog detected → Enter standby → Handling clog → Print Continue?
3.6 Resume Printing After Power Failure or Filament Outage
The Terminator T3 is equipped with a power failure detection module and a filament sensor. In the event of a sudden power loss or when filament runs out or breaks, the printer accurately records the print data and can resume the printing process once the issue is resolved. This feature helps prevent wasted filament and time.

Image: Diagram showing a print stopping due to power loss or filament outage and then resuming successfully.
3.7 Silent Printing
The printer incorporates a 32-bit high-performance silent motherboard with TMC2209 silent drivers, ensuring quiet operation with noise levels below 45dB. This allows for a more comfortable printing environment.

Image: Illustration depicting the silent operation of the printer, with noise levels below 45dB, allowing for undisturbed work or rest.
3.8 Magnetic Build Plate
The printer is equipped with a PC removable magnetic platform. This platform offers faster heating and stronger model adhesion during printing. After printing, the model can be easily removed by bending the flexible plate, without requiring tools or excessive force.

Image: Exploded view of the magnetic build plate, showing its layers: Magnetic Surface, Soft Magnetic Stick, and The Print Platform.
4. Maintenance
4.1 Belt Adjustment
To maintain printing accuracy and prevent noise caused by loose belts, the X and Y axes are equipped with manual belt adjusters. Periodically check the belt tension and adjust as needed to ensure optimal performance.

Image: Detailed view of the manual belt adjusters on both the X-axis and Y-axis of the printer.
4.2 Nozzle Maintenance
Regularly inspect the nozzle for any signs of wear or clogging. If a clog occurs, follow the printer's instructions for clearing it. Keeping the nozzle clean ensures consistent filament flow and print quality.
5. Troubleshooting
This section addresses common issues you might encounter with your SUNLU Terminator T3 printer.
- Printing Instability: Ensure the printer is placed on a stable, level surface. Re-run the auto-leveling process. Check belt tension and adjust if necessary.
- Filament Sensor Issues: If experiencing false positives with the filament sensor, ensure the filament path is clear and the sensor is clean. In some cases, disabling the sensor in the printer settings might be an option if it consistently causes issues.
- Poor Print Quality: Verify filament is dry and stored correctly. Check nozzle for clogs or wear. Ensure print bed is clean and properly leveled. Adjust print settings (temperature, speed, retraction) in your slicing software.
- Printer Not Responding: Check all power connections. Ensure the power switch is on. If the screen is blank, try restarting the printer.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | SUNLU |
| Model | Terminator T3 |
| Printing Technology | FDM (Fused Deposition Modeling) |
| Max Print Speed | 250mm/s |
| Build Volume | 220×220×250mm |
| Auto-Leveling | 16-point Intelligent Leveling |
| Motherboard | 32-bit Silent Motherboard with TMC2209 Drivers |
| Extruder | Metal Double Gear Extruder |
| Print Bed | PC Removable Magnetic Platform |
| Supported Filaments | PLA, ABS, PETG, TPU |
| Resume Functions | Power Failure Resume, Filament Run-out Detection, Clog Detection |
| Noise Level | <45dB |
| Material | Aluminum |
| Item Weight | 7 Kilograms (15.4 pounds) |
| Operating System | Linux |
7. Warranty and Support
The SUNLU Terminator T3 FDM 3D Printer comes with a 1-year warranty (excluding consumable parts). SUNLU offers lifetime technical support service for any after-sale inquiries or issues. For assistance, please refer to the contact information provided with your product or visit the official SUNLU website.
