1. Introduction
The LONGER LK1 is a highly pre-assembled FDM (Fused Deposition Modeling) 3D printer designed for ease of use and large-scale printing. It features a generous build volume of 300x300x400mm, a 2.8-inch color touchscreen for intuitive control, and supports various 1.75mm filaments such as PLA, ABS, and Wood. Its robust full-metal body and high-precision nozzle ensure stable and accurate prints.
Key features include:
- 90% Pre-Assembled: Most components are pre-assembled for quick setup.
- Large Print Size: 300x300x400mm build volume.
- High-Precision Nozzle: 0.4mm hot-end with a straight-through design for improved performance.
- 2.8-Inch Color Touchscreen: User-friendly interface for model preview and control.
- Resume Printing Function: Continues printing after power interruptions.
- Filament Detector: Automatically pauses printing when filament runs out or breaks.
- Tempered Glass Plate: Ensures print adhesion and flatness, reducing warping.
- New Aluminum Frame: Enhanced stability and modern design.
2. Package Contents
Before beginning assembly, please verify that all components listed below are present in your package:
Image: Accessories List showing main components and tools.
- Vertical Frame
- Frame Base
- Control Box
- Tool Box (containing various tools and small parts)
- Scraper
- USB Drive
- Cable Ties
- Filament Tube
- Hex Keys (various sizes)
- Pliers
- L-shaped Tool
- USB Cable
- Power Cable
- Screwdriver
- Wrench
- 8GB TF Card
- 5 meters PLA Filament (random color)
3. Setup and Assembly
The LONGER LK1 3D Printer arrives 90% pre-assembled, requiring only a few simple steps to get started.
Image: Diagram showing the four main assembly steps.
- Attach the Vertical Frame to the Base: Secure the gantry (vertical frame) to the frame base using the provided screws and tools. Ensure it is firmly seated and aligned.
- Connect the Control Box: Place the control box next to the printer base and connect the necessary cables (power, motor, end-stop switches) as indicated in the wiring diagram (refer to the full manual for detailed diagrams).
- Install the Filament Holder: Mount the filament spool holder onto the designated position on the printer frame.
- Complete Wiring: Connect all remaining cables, including the hot-end, heated bed, and touchscreen cables, ensuring all connections are secure. Double-check all wiring against the provided diagram to prevent damage.
Once assembled, ensure the printer is placed on a stable, level surface away from direct sunlight or drafts.
4. Operating Instructions
4.1 Power On and Initial Setup
- Connect the power cable to the printer and a suitable power outlet.
- Turn on the power switch, usually located on the control box.
- The 2.8-inch color touchscreen will illuminate.
4.2 Touchscreen Interface
The LK1 features a responsive color touchscreen for easy navigation and control. The interface allows you to preview models, adjust settings, and initiate prints.
Image: Touchscreen interface displaying the manual leveling options.
One of the key functions accessible via the touchscreen is bed leveling. Navigate to the 'Leveling' menu to manually adjust the bed at various points (Top Left, Top Right, Bottom Left, Bottom Right) for optimal print adhesion.
4.3 Filament Loading
- Place your filament spool onto the filament holder.
- Preheat the nozzle to the recommended temperature for your filament type (e.g., 200-210°C for PLA).
- Insert the filament into the extruder's input hole and push it through until it exits the nozzle.
- Confirm smooth extrusion.
4.4 Starting a Print
- Prepare your 3D model using slicing software (e.g., Cura, Repetier-Host) and save it as a G-code file onto the provided TF card.
- Insert the TF card into the printer's card slot.
- On the touchscreen, navigate to the 'Print' menu and select your desired G-code file.
- Confirm the print settings and start the print.
4.5 Resume Printing and Filament Detection
- Resume Printing: In case of a power outage, the printer will automatically save the print progress. Once power is restored, you can resume the print from where it left off via the touchscreen menu.
- Filament Detector: The printer is equipped with a filament sensor. If the filament runs out or breaks during a print, the printer will automatically pause, allowing you to load new filament and resume the print without losing progress.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your 3D printer.
- Clean the Build Plate: After each print, allow the tempered glass plate to cool and carefully remove the print. Clean the surface with isopropyl alcohol to remove any residue and ensure good adhesion for the next print.
- Clean the Nozzle: Periodically clean the nozzle to prevent clogs. You can use a small brass brush or the provided needle to clear any blockages.
- Check Belts and Pulleys: Ensure that the timing belts are properly tensioned and that the pulleys are free of debris. Loose belts can lead to layer shifting.
- Lubricate Moving Parts: Apply a small amount of lithium grease or similar lubricant to the smooth rods and lead screws every few months to ensure smooth movement of the print head and build plate.
- Inspect Wiring: Regularly check all electrical connections for any signs of wear or looseness.
6. Troubleshooting
Here are some common issues and their potential solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Print not sticking to bed | Bed not level, incorrect bed temperature, dirty bed, nozzle too far from bed | Re-level the print bed, adjust bed temperature, clean the bed with isopropyl alcohol, adjust Z-offset. |
| Filament not extruding | Nozzle clogged, incorrect temperature, tangled filament, extruder gear slip | Clear nozzle clog, increase nozzle temperature, untangle filament, clean extruder gear. |
| Layer shifting | Loose belts, print speed too high, motor overheating | Check and tighten belts, reduce print speed, ensure proper cooling for motors. |
| Poor print quality (stringing, blobs) | Incorrect retraction settings, excessive temperature, wet filament | Adjust retraction distance and speed in slicer, lower print temperature, dry filament. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | LONGER (Aibecy) |
| Model | LK1 |
| Color | Black |
| Material | Metal |
| Input Voltage | 220V |
| Output Voltage | 24V/DC 15A |
| Power | 280W |
| Printing Technology | FDM (Fused Deposition Modeling) |
| Print Size | 300 x 300 x 400mm |
| Touchscreen | 2.8 Inch Color Touchscreen |
| Resume Printing | Yes |
| Printing Speed | ≤180mm/s (60-80mm/s Recommended) |
| Layer Thickness | 0.1mm - 0.4mm |
| Extruder | Single |
| Nozzle Diameter | 0.4mm |
| Nozzle Temperature | Up to 250℃ |
| Heated Bed | Yes |
| Slice Software | Cura/Repetier-Host |
| File Format | G-Code, STL |
| Connection | USB Cable, TF Card |
| Filaments | Compatible with PLA/ABS/Wood, etc. |
| Diameter of Filament | 1.75mm |
| Supported OS | Windows/Mac |
| Supported Language | English |
| Product Size | 470 x 575 x 610mm |
| Product Weight | 10.6kg |
| Package Size | 64.0 x 53.0 x 31.0cm |
| Package Weight | 14.2kg |
8. User Tips
- Bed Adhesion: For best first layer adhesion, ensure your bed is perfectly level and clean. Using a thin layer of glue stick or hairspray on the tempered glass plate can also help, especially with certain filament types.
- Filament Storage: Store your filament in a dry, cool place. Humidity can degrade filament quality, leading to poor print results like stringing or brittle prints.
- Slicer Settings: Experiment with different slicing software settings (e.g., print speed, temperature, retraction) to optimize print quality for various filaments and models. Start with recommended settings and make small adjustments.
- First Layer Calibration: Pay close attention to the first layer. It is crucial for the success of the entire print. The filament should be slightly squished onto the bed, not floating above it or scraped too thin.
9. Warranty and Support
For detailed information regarding warranty coverage, technical support, and service, please refer to the official product documentation or contact the manufacturer's customer service. Keep your purchase receipt as proof of purchase.
