## Technical Overview: OF-08HS28DP The **OF-08HS28DP** is a high-performance, two-phase hybrid stepper motor, typically categorized under the **NEMA 11** frame size. These motors are engineered for precision motion control in compact environments. --- ### 1. Key Specifications The following table outlines the primary electrical and physical characteristics: | Parameter | Specification | | :--- | :--- | | **Motor Type** | Hybrid Stepper | | **Step Angle** | 1.8° (200 steps per revolution) | | **Frame Size** | NEMA 11 (28mm x 28mm) | | **Phase Count** | 2 Phases | | **Current / Phase** | Approx. 0.6A - 0.8A (Model specific) | | **Holding Torque** | ~0.08 Nm to 0.12 Nm | | **Resistance / Phase** | ~4.5 Ω to 6.5 Ω | | **Inductance / Phase** | ~3.2 mH to 5.0 mH | --- ### 2. Electronic Components & Internal Construction The "Electronic" functionality of this motor relies on the interaction between its magnetic and conductive internal parts: * **Stator (Electromagnetic Part):** Consists of two sets of coils (windings). When current flows through these coils, it creates an electromagnetic field that attracts or repels the rotor. * **Rotor (Permanent Magnet Part):** Unlike standard DC motors, this uses a permanent magnet rotor with "teeth." The alignment of these teeth with the stator determines the precision. * **Wiring Configuration:** Usually features 4 lead wires (Bipolar). * **Phase A:** Red/Blue wires * **Phase B:** Green/Black wires * **Bearings:** Precision ball bearings are used to reduce friction and electrical noise while maintaining high radial loads. --- ### 3. Integration Requirements To operate the OF-08HS28DP, you require specific electronic support hardware: 1. **Stepper Driver:** Since this is a bipolar motor, you need a driver like the **A4988**, **DRV8825**, or **TMC2208**. The driver converts low-level logic signals into the high-current pulses required to move the motor. 2. **Controller:** A Microcontroller (Arduino, ESP32) or PLC to send "Step" and "Direction" signals to the driver. 3. **Power Supply:** Typically operates on **12V to 24V DC**. Even though the motor is rated for lower voltage, higher voltage allows the current to overcome inductance faster, improving torque at high speeds. --- ### 4. Common Applications * **Medical Devices:** Precision pumps and fluid handling. * **3D Printers:** Specifically for lightweight extruders (Titan or BMG style). * **Optics:** Zoom and focus mechanisms for cameras or telescopes. * **Robotics:** Small-scale robotic grippers and joints.