The **M6SWVS-45-R/K** is a specialized precision potentiometer, typically manufactured by companies like **Copals Electronics (Nidec)**. This specific series is widely used in industrial controls, medical equipment, and high-reliability instrumentation. Below is a detailed breakdown of its electronic and mechanical parts. --- ## 1. Technical Specifications The part number indicates a specific configuration within the M6SWVS series. Here are the core electronic characteristics: | Parameter | Specification (Typical) | | :--- | :--- | | **Type** | Single-turn Conductive Plastic Potentiometer | | **Resistance Range** | 1 kΩ to 10 kΩ (Standard) | | **Resistance Tolerance** | ±15% or ±20% | | **Independent Linearity** | ±1% to ±2% | | **Power Rating** | 0.1W to 0.25W at 70°C | | **Effective Electrical Angle** | 45° (indicated by the "-45" in the part number) | | **Rotational Life** | 5 to 10 million cycles | --- ## 2. Internal Electronic Construction The M6SWVS-45-R/K consists of three primary internal components that manage the signal: ### A. Conductive Plastic Element Unlike wire-wound potentiometers, this uses a **Conductive Plastic** track. * **Advantage:** Provides an extremely smooth surface, resulting in "infinite resolution" (no steps in voltage). * **Durability:** It offers a much higher rotational life compared to carbon or wire tracks. ### B. Multi-Finger Wiper (Contact) The wiper is the moving part that slides across the resistive track. * In the "R/K" variant, this is usually a precious metal multi-finger contact. * The multiple fingers ensure that even if one contact point lifts due to vibration, the others maintain electrical continuity, reducing "output smoothness" noise. ### C. Termination The "R/K" suffix often refers to the terminal style or mounting orientation (typically **PC Pin** or **Rear Terminal**). These allow for stable soldering onto a PCB without introducing parasitic resistance. --- ## 3. Operational Logic This component functions as a **Voltage Divider**. ```c // Basic Logic of the Potentiometer Output Output_Voltage = Input_Voltage * (Current_Angle / Total_Electrical_Angle) ``` In the case of the **-45** model, the full resistance range is compressed into a **45-degree** physical rotation. This makes it ideal for applications involving small-angle movements, such as: * Joystick controllers. * Valve position sensing. * Tension control arms. --- ## 4. Environmental and Mechanical Build * **Housing:** Usually glass-filled nylon or aluminum to shield against EMI (Electromagnetic Interference). * **Shaft:** Stainless steel or high-strength plastic, designed for low torque to ensure high sensitivity. * **Sealing:** Often rated IP40 or higher to prevent dust ingress from affecting the conductive track.