1. Introduction
Welcome to the user manual for your Creality Ender 3 3D Printer. This guide provides essential information for assembling, operating, maintaining, and troubleshooting your printer. The Ender 3 is designed for high-precision Fused Deposition Modeling (FDM) 3D printing, offering a build volume of 220 x 220 x 250mm. It supports various filament types, including PLA, ABS, TPU, wood, and copper.
The Ender 3 features a resume printing function, allowing prints to continue after power outages, and a magnetic self-adhesive platform for easy model creation.

Image: The Creality Ender 3 3D Printer, showcasing its compact design and build area.
2. Safety Information
- Always operate the printer in a well-ventilated area.
- Keep the printer away from flammable materials and direct heat sources.
- Do not touch the hot nozzle or heated bed during operation or immediately after.
- Ensure the power supply is correctly set to your local voltage (115V or 230V) before plugging in.
- Keep out of reach of children and pets.
- Use only recommended filaments and parts.

Image: Before and after setting the power supply voltage switch. Ensure the correct voltage is selected for your region.

Image: Location of the power supply switch on the right profile of the printer. Adjust before first use.
3. Package Contents
Upon opening the package, verify that all components are present and undamaged.

Image: A comprehensive view of the Creality Ender 3 3D printer components and tools included in the package, laid out for assembly.

Image: Detailed view of various assembly parts and tools provided with the Ender 3, including wrenches, screwdrivers, and small components.
The package typically includes:
- Printer frame components (base, gantry, Z-axis assembly)
- Hotend and extruder assembly
- Heated print bed with magnetic surface
- Control screen and knob
- Power supply unit
- Filament holder
- Tools for assembly (wrenches, screwdrivers, Allen keys)
- Sample filament
- SD card and USB card reader
- Spatula and pliers
4. Assembly Instructions
The Creality Ender 3 is designed for DIY assembly, which typically takes around 2 hours. Follow these general steps for assembly. Refer to the detailed assembly guide provided with your printer for specific instructions.
- Base Assembly: Secure the vertical frame components to the base.
- Gantry Installation: Attach the horizontal gantry (X-axis) to the vertical frames.
- Hotend and Extruder: Mount the hotend and extruder assembly onto the X-axis carriage.
- Wiring: Connect all motors, endstops, hotend, heated bed, and control screen to the mainboard. Ensure all connections are secure.
- Filament Holder: Install the filament holder on top of the frame.
- Power Supply: Connect the power supply unit.
Note: Pay close attention to the power supply voltage switch. Ensure it matches your local power grid (115V for North America, 230V for Europe and most other regions) before plugging in the printer.
5. Initial Setup
5.1. Bed Leveling
Proper bed leveling is crucial for successful prints. The Ender 3 features large hand-twist nuts for easier bed leveling.

Image: Illustration of the bed leveling process using the large hand-twist nuts located under the print platform.
- Heat the bed to your desired printing temperature (e.g., 60°C for PLA).
- Disable steppers from the control panel.
- Move the hotend to each of the four corners of the bed.
- Use a piece of paper between the nozzle and the bed. Adjust the leveling nuts until you feel slight resistance when moving the paper.
- Repeat for all four corners multiple times until the bed is consistently leveled.
5.2. Software Installation
The Ender 3 is compatible with various slicing software, such as Creality Print, Cura, or PrusaSlicer. Install your preferred software on a personal computer (compatible with Windows XP and newer operating systems).
Slicing: Use the software to convert your 3D models (e.g., OBJ format) into G-code, which the printer understands.
6. Operating Instructions
6.1. Loading Filament
- Place the filament spool onto the filament holder.
- Feed the filament through the filament sensor (if present) and into the extruder.
- Heat the hotend to the appropriate temperature for your filament (e.g., 200°C for PLA).
- Press the extruder lever and push the filament through the hotend until it extrudes smoothly from the nozzle.
6.2. Starting a Print
- Save your sliced G-code file to the provided SD card.
- Insert the SD card into the printer's SD card slot.
- Navigate the printer's menu to "Print from SD" and select your file.
- The printer will begin heating the bed and nozzle, then start the print.
6.3. Resume Printing Function
The Ender 3 features a resume printing function. In case of a power outage or accidental disconnection, the printer can resume the print from where it left off once power is restored.

Image: An illustration demonstrating the resume printing function, showing how a print can continue from its last point after a power interruption.
7. Maintenance
- Clean the Nozzle: Regularly clean the nozzle to prevent clogs.
- Clean the Print Bed: Wipe the print bed with isopropyl alcohol before each print for optimal adhesion.
- Lubricate Moving Parts: Periodically lubricate the Z-axis lead screw and other moving parts.
- Check Belts: Ensure the X and Y axis belts are properly tensioned.
- Firmware Updates: Check the manufacturer's website for any available firmware updates.
8. Troubleshooting
8.1. Common Issues
| Problem | Possible Cause | Solution |
|---|---|---|
| Filament not extruding | Clogged nozzle, tangled filament, incorrect temperature | Clean nozzle, untangle filament, check temperature settings |
| Poor first layer adhesion | Unleveled bed, dirty bed, incorrect bed temperature | Re-level bed, clean bed, adjust bed temperature |
| Prints detaching from bed | Same as above, or cooling too fast | Ensure proper bed adhesion, adjust cooling settings |
| Layer shifting | Loose belts, motor issues, print head hitting print | Check belt tension, inspect motors, ensure print clearance |
9. Specifications
| Brand | Comgrow |
| Model | Ender 3 |
| Printing Technology | Fused Deposition Modeling (FDM) |
| Build Volume | 220 x 220 x 250 mm |
| Compatible Filaments | PLA, ABS, TPU, Wood, Copper, PETG |
| Product Dimensions | 45.2P x 43W x 52H cm |
| Item Weight | 15.43 lbs |
| Supported File Format | OBJ |
| Compatible Operating Systems | Windows XP and newer |
| Color | Grey / Black |

Image: Diagram showing the dimensions of the Creality Ender 3 3D Printer.
10. Warranty and Support
This product comes with a manufacturer's warranty of 1 year. For technical support, troubleshooting assistance, or warranty claims, please contact Comgrow customer service.
For further information and resources, you may visit the official Comgrow brand store: Comgrow Store.

Image: The official Comgrow brand logo.