The **RB-3114-R** is a high-performance, precision DC gearmotor commonly used in robotics and automation. It is characterized by its high torque output and integrated encoder for closed-loop control. --- ### Technical Specifications Below are the primary electronic and mechanical specifications for the RB-3114-R: | Specification | Value | | :--- | :--- | | **Operating Voltage** | 12V DC (Nominal) | | **Gear Ratio** | 50:1 | | **No Load Speed** | 200 RPM | | **Stall Torque** | 16 kg-cm (approx. 222 oz-in) | | **Stall Current** | 5.0 A | | **No Load Current** | 300 mA | | **Encoder Type** | Hall Effect (Quadrature) | --- ### Key Components & Features #### 1. DC Motor Section The core is a brushed DC motor. It operates on a pulse-width modulation (PWM) signal if speed control is required. While rated for 12V, it can operate at lower voltages with a proportional loss in torque and RPM. #### 2. Quadrature Encoder The "R" suffix often denotes the inclusion of a rear-mounted magnetic disc and two Hall effect sensors. * **Feedback:** Provides two channels (A and B) shifted by 90 degrees. * **Resolution:** Typically provides 64 counts per revolution (CPR) of the motor shaft, which equates to **3200 counts per revolution** of the gearbox output shaft (due to the 50:1 ratio). * **Function:** Allows the controller to track position, direction, and velocity. #### 3. Metal Gearbox The motor is mated to a 50:1 all-metal spur gearbox. This increases torque significantly while reducing the output speed, making it ideal for heavy-duty mobile robots. --- ### Wiring Interface The unit typically features a 6-pin connector or lead wires with the following standard assignment: | Pin/Wire Color | Function | Description | | :--- | :--- | :--- | | **Red** | Motor + | Positive terminal for motor power | | **Black** | Motor - | Negative terminal for motor power | | **Green** | Encoder GND | Ground for the Hall sensors | | **Blue** | Encoder VCC | Logic power for sensors (usually 3.3V - 5V) | | **Yellow** | Signal A | Quadrature output phase A | | **White** | Signal B | Quadrature output phase B | --- ### Recommended Controllers To handle the **5.0A stall current**, you should use a robust motor driver. Basic L298N drivers are usually insufficient. Recommended options include: * **Cytron 10A Motor Driver** * **RoboClaw 2x7A or 2x15A** (excellent for encoder integration) * **Discrete MOSFET H-Bridges**