1. Introducció
The Kingroon KP3S is a compact and efficient FDM (Fused Deposition Modeling) 3D printer designed for both beginners and experienced users. It features a direct drive extruder, dual linear guide rails for enhanced precision, and a flexible magnetic build plate for easy model removal. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your KP3S 3D printer to ensure optimal performance and longevity.

Figure 1: Kingroon KP3S 3D Printer overview.
2. Informació de seguretat
Please read all safety warnings and instructions carefully before operating the printer. Failure to do so may result in injury or damage to the printer.
- Feu servir sempre la impressora en una zona ben ventilada.
- Mantingueu les mans allunyades de les peces mòbils durant el funcionament.
- The hot end and heated bed can reach high temperatures. Avoid direct contact during and immediately after printing.
- Do not leave the printer unattended while operating.
- Use only recommended power supplies and filaments.
- Keep the printer away from flammable materials and liquids.
3. Contingut del paquet
Verify all components are present upon unboxing:

Figure 2: Included components in the Kingroon KP3S package.
- Kingroon KP3S 3D Printer (partially assembled)
- Unitat d'alimentació
- Portabobina de filament
- Sample PLA Filament
- Cable USB
- Targeta SD i lector de targetes
- Tools (wrenches, hex keys, pliers)
- Spare Nozzle and Thermistor
- Manual d'usuari i targeta de garantia
4. Configuració
4.1 Muntatge
The Kingroon KP3S is designed for quick assembly, typically requiring only a few screws to connect the main components. Refer to the included quick start guide for detailed visual instructions.
Video 1: Kingroon KP3S 3D Printer Show. This video provides an overview of the printer's features and a brief demonstration of its assembly process.
4.2 Initial Bed Leveling
Accurate bed leveling is crucial for successful prints. The KP3S features manual bed leveling with four adjustment knobs under the print bed.
- Heat the print bed to your desired printing temperature (e.g., 60°C for PLA).
- Navigate to the 'Leveling' menu on the 2.4" LCD Touch Screen.
- Move the nozzle to each of the four corners and the center of the print bed.
- Adjust the bed leveling knobs until a piece of standard printer paper can slide with slight resistance between the nozzle and the print bed.

Figure 3: Illustration of Z-axis fixed block and rigid coupling for improved verticality and printing accuracy, which contributes to stable bed leveling.
4.3 Càrrega de filaments
Per carregar el filament:
- Col·loqueu la bobina de filament al portabobines.
- Preheat the hot end to the filament's recommended temperature (e.g., 200°C for PLA).
- Insert the filament into the direct drive extruder and push it through until it exits the nozzle.
- Ensure the filament flows smoothly and consistently.
5. Instruccions de funcionament
5.1 User Interface: 2.4" LCD Touch Screen
The Kingroon KP3S features an intuitive 2.4-inch LCD touch screen for easy control and monitoring of your prints.

Figure 4: The 2.4-inch LCD touch screen displaying various control options including preheat, home, move, leveling, settings, and print functions.
5.2 Procés d'impressió
To begin a print:
- Prepare your 3D model using slicing software (e.g., Cura, PrusaSlicer) and save it to the SD card in G-code format.
- Insert the SD card into the printer's card slot.
- On the LCD screen, navigate to the 'Print' menu and select your desired G-code file.
- The printer will automatically preheat the hot end and bed, then begin printing.
5.3 Key Features for Enhanced Printing
- Extrusora d'accionament directe: Provides precise filament control, reducing stringing and improving print quality, especially for flexible filaments like TPU.
- Dual Linear Guide Rails: Enhances stability and accuracy of XZ-axis movement, leading to higher printing precision and smoother surface finishes.
- Flexible Magnetic Build Plate: Offers excellent adhesion during printing and allows for easy removal of finished models by simply flexing the plate.
- Resume Printing Function: In case of power loss, the printer can resume printing from where it left off, saving time and material.

Figure 5: The direct drive extruder ensures uniform and smooth filament output.

Figure 6: The XZ axis linear guide rail system for higher printing accuracy.

Figure 7: The flexible magnetic build plate provides great adhesion and easy model removal.
6. Manteniment
Regular maintenance ensures the longevity and consistent performance of your Kingroon KP3S printer.
- Netegeu la base d'impressió: After each print, allow the bed to cool and gently remove any filament residue. Use isopropyl alcohol to clean the surface periodically.
- Extruder and Nozzle Cleaning: Regularly check the extruder gear for filament debris. If clogs occur, preheat the nozzle and use a needle or cleaning filament to clear it. Consider replacing the nozzle if print quality degrades significantly.
- Lubricate Linear Rails: Apply a small amount of lithium grease or machine oil to the linear guide rails every few months to ensure smooth movement.
- Check Belts and Pulleys: Ensure all belts are properly tensioned and pulleys are free of debris.
7. Solució De Problemes
Aquesta secció tracta problemes comuns que podeu trobar.
| Problema | Causa possible | Solució |
|---|---|---|
| Mala adherència de la primera capa | Bed not level, incorrect bed temperature, dirty print surface, nozzle too far from bed. | Re-level the print bed, adjust bed temperature, clean the print surface, adjust Z-offset. |
| Filament no extrudit | Clogged nozzle, tangled filament, incorrect temperature, extruder gear slipping. | Clear nozzle clog, untangle filament, verify hot end temperature, check extruder tension. |
| Canvi de capes | Loose belts, motor overheating, print speed too high, mechanical obstruction. | Check and tighten belts, ensure proper cooling, reduce print speed, clear obstructions. |
| Soroll excessiu | Loose components, worn bearings, fan noise. | Tighten screws, lubricate moving parts, consider replacing noisy fans if necessary. The KP3S uses a silent TMC2225 chip for quieter operation. |
8. Especificacions
Detailed technical specifications for the Kingroon KP3S 3D Printer:

Figure 8: Print size dimensions of the Kingroon KP3S.
| Característica | Detall |
|---|---|
| Tecnologia d'impressió | FDM (Fused Deposition Modeling) |
| Volum de construcció | 7.08 x 7.08 x 7.08 polzades (180 x 180 x 180 mm) |
| Dimensions del producte | 11 x 15.8 x 14.6 polzades |
| Pes de l'article | 15.42 lliures |
| Material compatible | Alloy Steel, Thermoplastic Polyurethane (PLA, PETG, TPU, ABS supported with proper hotend) |
| Tipus d'extrusora | Conducció directa |
| Placa base | Silent TMC2225 chip all-in-one motherboard |
| Superfície de construcció | Placa de construcció magnètica flexible |
| Connectivitat | SD Card, USB |
9. Garantia i Suport
Kingroon provides a warranty for the KP3S 3D Printer. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, troubleshooting assistance, or to inquire about replacement parts, please visit the official Kingroon website or contact their customer service directly. Keeping your purchase receipt is recommended for warranty claims.