Description
The Woodward 8256-086 is a high-precision Actuator from the EPG 1712 series, specifically designed for applications that demand consistent, reliable engine speed regulation. Featuring advanced sealed position feedback, this model provides the speed control unit with continuous, accurate data regarding the actual position of the fuel linkage. Because it is engineered for a 12-Volt electrical system, it serves as an ideal solution for smaller prime movers, mobile power units, and agricultural equipment where a 12V battery source is standard.
Product Technical Details
- Model Number: 8256-086
- Series: EPG (1712 Configuration)
- Feedback Mechanism: Sealed position feedback for closed-loop accuracy
- Operating Voltage: 12 VDC
- Control Compatibility: Supports Isochronous control and single-phase droop modes
- Weight: ~2.15 kg
- Country of Origin: United States of America
Common Questions & Answers
💡 What is the difference between Isochronous control and Droop mode? Isochronous control is designed to maintain a constant, steady engine speed regardless of the electrical load applied to the generator. Droop mode, however, allows the engine speed to decrease slightly as the load increases. The 8256-086 supports both, providing flexibility to switch between steady-state performance (Isochronous) or stable load-sharing between multiple generator sets (Droop).
⚙️ Why does this model use a 12V supply instead of 24V? The 1712 series is optimized for platforms where 12V is the primary power source. While the internal coil design differs from 24V models to account for the lower voltage, the performance and control accuracy remain high, provided the speed controller is configured to output the correct current for this specific coil impedance.
🛡️ How does sealed position feedback improve reliability? In harsh or dusty environments, traditional sensors can be prone to contamination. The “sealed” design protects the feedback potentiometer from dirt, moisture, and oil mist. This ensures that the signal reporting the fuel rack position remains clean and noise-free, preventing the governor from “jittering” due to incorrect feedback readings.
🔧 Is the 8256-086 difficult to calibrate? Calibration is straightforward when using a compatible Woodward speed controller. Because the actuator reports its position, the controller can perform a more refined PID (Proportional-Integral-Derivative) tuning. During initial setup, you will typically need to verify the full-stroke linkage travel to match the controller’s output limits.
Recommended Woodward Series & Models
If you are maintaining or retrofitting a system with the 8256-086, these compatible series and related components are frequently utilized:
- Woodward 8290-037 (EPG 12V Speed Control)
- Woodward 8256-078 (Alternative 24V Feedback Model)
- Woodward 8272-356 (Magnetic Pickup Speed Sensor)
- Woodward 8270-1002 (701A Digital Governor)
- Woodward 8404-1002 (Peak 150 Controller)
- Woodward 8273-001 (EasyGen 1000 Series)
- Woodward 8290-038 (12V/24V Universal Speed Control)
- Woodward 8256-021 (524 Configuration Actuator)
- Woodward 9907-162 (2301A Load Sharing Controller)
- Woodward 8290-186 (Integrated EPG System)
