Introduzione
This manual provides detailed instructions for the installation, operation, maintenance, and troubleshooting of the Mellow WS7040 24V Brushless Centrifugal Air Blower. This high-performance fan is designed for applications requiring efficient airflow, such as 3D printers like VzBoT and HevORT.

The Mellow team is dedicated to developing 3D printer accessories compatible with various 3D printers, focusing on NF Extruders, NF Hotends, and FLY Motherboards and Electronics. Your feedback on products, usage, and sales is welcome.
Specifiche
The Mellow WS7040 is a compact and powerful centrifugal blower. Key specifications are detailed below:
| Attributo | Specificazione |
|---|---|
| Numero di modello | 10WS7040 (WS7040-24-V200) |
| Tipo di articolo | Fan (Centrifugal Blower) |
| Nome del marchio | Dolce |
| Origine | Cina continentale |
| Misurare | Dimensioni: 70 x 71 x 22.4 mm |
| Voltage | CC 24V |
| Attuale | 2.7A |
| Speed (Free-blowing) | 37000 giri/min ± 7% |
| Air Pressure (Free-blowing) | 6.5 kPa |
| Speed (At working point) | 40000 giri/min ± 7% |
| Air Pressure (At working point) | 4 kPa |
| Tipo di motore | Three Phase Brushless |
| Tipo di cuscinetto | NMB Ball bearing |
| Rigidità dielettrica | 500VDC for 1 Min |
| Classe di isolamento | Classe F |
| Classe di protezione | Grado di protezione IP20 |
| Intervallo di temperatura di esercizio | da -20°C a +60°C (senza condensa) |
| Service Life (MTTF at 25°C) | 10,000 ore |
| Sensore ad effetto Hall | 60 |
| Speed @ Hall Sensor Frequency | 1Hz = 60 r/min |
| Tipo di conducente | WS120BDY01V03-SRP008/WS2403DY01V04 |
| Peso del prodotto | 78g |


Contenuto della confezione
Il pacchetto include i seguenti articoli:
- 1 x WS7040 Blower Fan
- 1 x Driver Board (pre-connected or included for installation)

Configurazione e installazione
The WS7040 blower fan comes with a driver board and supports two primary control methods:
Method 1: Potentiometer Knob Control
For direct speed control using the included potentiometer knob:
- Ensure the driver board is connected to the fan.
- Connect the driver board directly to a 24V DC power supply.
- Use the potentiometer knob to adjust the fan speed.



Method 2: Motherboard or Raspberry Pi Control
To control the fan speed using a 3D printer motherboard or Raspberry Pi:
- Remove the potentiometer from the driver board.
- Connect the signal pin of the driver board to a 5V or 3.3V pin on your motherboard or Raspberry Pi.
- Connect the GND pin of the driver board to the GND of your motherboard or Raspberry Pi.
- Ensure your firmware is configured correctly for PWM fan control.
Istruzioni per l'uso
Once installed, the fan can be operated via the potentiometer or through your 3D printer's control system. Below are common firmware configurations:
Firmware Configuration Examples:
Firmware Marlin:
To enable software PWM control for the fan in Marlin, modify your Configuration_adv.h file:
- Abilitare
FAN_SOFT_PWM. - Impostato
SOFT_PWM_SCALEA5.
Duetboard Firmware:
For Duetboards, fan control typically involves configuring the fan output in your config.g file using M950 and M106 commands. Ensure the fan is assigned to a PWM-capable pin and configured for the correct frequency and inversion if necessary. Refer to the Duet3D documentation for detailed fan configuration specific to your Duet board version.
Firmware Klipper:
For Klipper, add a fan section to your printer configuration file (per esempio, printer.cfg):
[fan]
pin: host:gpio26
hardware_pwm: False
cycle_time: 0.005Regolare pin: host:gpio26 to match the actual GPIO pin connected on your Raspberry Pi or host device.
Manutenzione
To ensure optimal performance and longevity of your Mellow WS7040 blower fan, follow these maintenance guidelines:
- Pulizia: Periodically inspect the fan's intake and outlet for dust, debris, or filament strands. Gently clean with compressed air or a soft brush to prevent blockages and maintain airflow efficiency.
- Ambiente operativo: Operate the fan within its specified temperature range of -20°C to +60°C. Avoid environments with high humidity or condensation, as this can damage internal components.
- Longevità del cuscinetto: The NMB ball bearings are designed for a long service life (up to 10,000 hours MTTF at 25°C). Avoid excessive mechanical stress or vibrations that could shorten bearing life.
- Alimentazione elettrica: Ensure a stable 24V DC power supply is used. Fluctuations or incorrect voltage can affect performance and lifespan.
Risoluzione dei problemi
If you encounter issues with your WS7040 blower fan, consider the following troubleshooting steps:
- La ventola non gira:
- Check power connections to the driver board and ensure a stable 24V DC supply.
- Verificare che tutti i collegamenti elettrici siano sicuri e corretti secondo lo schema di installazione.
- If using potentiometer control, ensure the potentiometer is not set to minimum speed.
- If using motherboard/Raspberry Pi control, check your firmware configuration and ensure the control signal pin is correctly connected and outputting a PWM signal.
- Reduced Airflow/Noise:
- Inspect the fan blades and housing for any obstructions (dust, debris). Clean as necessary.
- Ensure the fan is mounted securely and not vibrating excessively.
- Check for any damage to the fan blades or housing.
- Velocità incoerente:
- If using potentiometer control, check the potentiometer for loose connections or damage.
- If using motherboard/Raspberry Pi control, verify the stability of the PWM signal from your controller.
If problems persist after attempting these steps, please contact Mellow 3D Official Store support for further assistance.
Suggerimenti per l'utente
- Driver Board Included: The WS7040 blower fan package includes the necessary driver board, simplifying installation and control.
- Controllo versatile: The fan can be controlled either directly via the included potentiometer for manual speed adjustment or integrated into a 3D printer's control system (e.g., Marlin, Duet, Klipper) for automated control.
- Compatibilità: While designed for 3D printers like VzBoT and HevORT, the fan's 24V DC input and flexible control options make it adaptable to various projects requiring high-pressure airflow.
Domande frequenti (FAQ)
- Q: What are the main features of this product?
- A: This is a Mellow WS7040 24V Brushless Centrifugal Air Blower, known for its high air pressure and long service life, suitable for 3D printer applications.
- Q: Does the package include the driver board?
- A: Yes, the WS7040 Blower Fan package includes the dedicated driver board.
- Q: Can this fan be controlled by a 3D printer motherboard?
- A: Yes, by removing the potentiometer and connecting the signal pin to a 5V or 3.3V pin on your motherboard (e.g., Marlin, Duet, Klipper), you can control the fan via firmware.
Garanzia e supporto
For any product inquiries, technical support, or warranty claims, please contact the Mellow 3D Official Store directly. Provide your purchase details and a clear description of the issue for prompt assistance.





