Product Overview
The SUNLU S1 Plus Filament Dryer Box is designed to maintain optimal filament conditions for 3D printing. It helps prevent common printing issues caused by moisture absorption in various filament types, ensuring higher print quality and reliability.

Package Contents
- SUNLU S1 Plus Filament Dryer Unit
- Power Adapter
- User Manual
- Filament Guide Tubes (small white gaskets)
Setup Instructions
- Place the filament spool into the drying chamber. The dryer supports various spool sizes and filament diameters (1.75mm, 2.85mm, 3.00mm).

Image illustrating the compatibility of the SUNLU S1 Plus Filament Dryer with various filament spool sizes and diameters (1.75mm, 2.85mm, 3.00mm). - Select the appropriate filament outlet hole (top or front) based on your 3D printer's inlet position. Use the provided guide tubes if necessary.
- Connect the power adapter to the dryer and a power source.
Operating the Filament Dryer
The SUNLU S1 Plus features a 2-inch LCD screen and two control buttons for easy operation.
Power On/Off
- To power on, press the Left or Right button.
- To power off, press both buttons simultaneously.
Temperature Setting
- After powering on, press the Left or Right button to set the target temperature. The adjustable temperature range is 35°C to 55°C.
- Refer to the material-specific temperature guidelines in the manual for optimal drying.
Time Setting
- Hold the Left button to enter time setting mode.
- Press Left or Right to adjust the drying duration (1-99 hours).
- Hold the Left button again to confirm and exit.
Humidity Display
- Hold the Right button to display the current chamber humidity (%RH).
- Hold the Right button again to exit the humidity display.
Filament Compatibility and Recommended Settings
The dryer is compatible with a wide range of 3D printing filaments. Below are general recommended settings:
| Material | Baking Temp (°C) | Time (h) |
|---|---|---|
| PLA | 45-50 | 3-6 |
| WOOD | 45-50 | 3-6 |
| PVB | 45-50 | 3-6 |
| ABS | 50-55 | 3-6 |
| HIPS | 50-55 | 3-6 |
| PC | 50-55 | 3-6 |
| PA | 50-55 | 3-6 |
| ASA | 50-55 | 3-6 |
| PETG | 47-51 | 3-6 |
| TPU | 47-51 | 3-6 |
Note: The operating temperature range for this product is 20°C to 35°C. If the ambient temperature is below 10°C, it may fail to start normally, which is considered a normal occurrence.
Maintenance
- Regularly inspect the filament path for any debris or blockages.
- Keep the dryer clean and free from dust to ensure optimal performance.
- Store the dryer in a dry environment when not in use.
Troubleshooting Common Issues
Poor Print Quality (Stringing, Blobs, Poor Adhesion)
- Cause: Filament has absorbed moisture.
- Solution: Increase drying time or temperature within recommended ranges. Ensure filament is thoroughly dried before and during printing.

Dryer Not Heating
- Cause: Ambient temperature is too low (below 10°C).
- Solution: Operate the dryer in an environment within the recommended temperature range (20°C to 35°C).
Product Specifications
- Product Size: 271(L)x100(W)x237(H)mm
- Max Coil Size: Ø210*85(H)mm
- Net Weight: 980g
- Filament Diameter: 1.75/2.85/3.0mm
- Working Humidity: ≤90%
- Working Temperature: 35°C-55°C
- Input Power: AC 100V-240V, 50/60HZ
- Output Power: DC 24V ± 1.2V, 2A
- Standby Power: 0.05W
- Max Working Electricity: 1.8A
- Max Working Power: 48W
- LCD Screen Size: 2 inch
Warranty and Support
The product comes with a one-year warranty under normal operating conditions as described in this manual.
The warranty does not cover damages caused by using power cables of different specifications or incorrect operation as per the instructions in the manual during the warranty period.
For after-sales service and support, please visit the official SUNLU website or contact their support team.





