The **W2TS-4A3-R2/K** (often referenced as part of the W2TS series) is a specialized electronic component, typically categorized as a **Limit Switch** or a **Precision Touch Switch**, often manufactured by companies like **Metrol**. These parts are designed for high-precision positioning in industrial automation. --- ### 1. Key Technical Specifications Below is a breakdown of the typical electronic and mechanical characteristics for this series: | Feature | Specification | | :--- | :--- | | **Contact Type** | Normally Closed (NC) or Normally Open (NO) | | **Switching Accuracy** | 0.001mm to 0.005mm (depending on specific sub-model) | | **Operating Force** | Low (approx. 0.5N to 1.5N) | | **Output Mode** | Contact (Mechanical) or Transistor (via amplifier) | | **Protection Rating** | IP67 (Waterproof and Oil-resistant) | | **Cable Type** | Oil-resistant robot cable | --- ### 2. Breakdown of the Model Code While naming conventions can vary slightly by manufacturer, the code generally breaks down as follows: * **W2TS**: Series identifier (Precision Touch Switch/Limit Switch). * **4A**: Refers to the physical dimensions or the tip style (e.g., 4mm diameter or specific probe shape). * **3**: Often denotes the cable length (3 meters). * **R2**: Usually indicates the "Right Angle" orientation of the connector or cable exit. * **SLASHK (/K)**: Typically denotes a specialized modification, such as high-temperature resistance or specific chemical compatibility. --- ### 3. Core Components & Functionality #### A. The Contact Probe The "sensing" part of the switch. It uses a high-hardness material (often stainless steel or tungsten carbide) to ensure that the physical contact does not wear down, maintaining micrometer-level accuracy over millions of cycles. #### B. The Housing Constructed from chrome-plated brass or stainless steel. It is designed to withstand harsh CNC environments where metal shavings, coolant, and oils are prevalent. #### C. Internal Circuitry Unlike a standard household switch, these parts utilize gold-plated contacts to ensure extremely low contact resistance. This ensures that the signal sent to the PLC (Programmable Logic Controller) is clean and free of "bounce" or noise. --- ### 4. Common Applications * **CNC Tool Setting:** Detecting the length or diameter of a cutting tool. * **Positioning:** Ensuring a robotic arm or motorized slide has reached a precise home coordinate. * **Quality Control:** Measuring the height or width of a manufactured part on an assembly line.