The **M2RT-60-R2/K** is a specialized precision sensing component, typically identified as a **high-precision touch probe or tool setter** (often manufactured by brands like Metrol). These devices are critical in CNC machining for automated tool length measurement and breakage detection. --- ## 1. Core Technical Specifications The model number breakdown reveals the specific electronic and mechanical characteristics of the sensor: | Feature | Specification | Description | |:---|:---|:---| | **Output Type** | Contact (Mechanical Switch) | Highly reliable physical contact mechanism. | | **Contact Arrangement** | NC (Normally Closed) | Circuit opens when the probe is triggered. | | **Stroke/Pre-travel** | ~0.5mm to 1.5mm | The distance the probe moves before signaling. | | **Contact Force** | 1.0N to 1.5N | Low force to prevent damage to delicate tools. | | **Repeatability** | 0.001mm (1μm) | Extremely high precision for industrial tolerances. | | **Protection Rating** | IP67 | Fully protected against coolant and metal chips. | --- ## 2. Electronic Interface & Wiring The "R2" and "K" designations usually refer to the cable configuration and the connector type. ### Wiring Diagram (Standard 2-Wire) Most M2RT models utilize a simple 2-wire setup for integration into a PLC or CNC Controller (like Fanuc, Mitsubishi, or Haas). * **Red/Brown Wire:** Signal (+) * **Blue/Black Wire:** Common (0V / COM) ### Electronic Signal Behavior 1. **Idle State:** The internal switch is closed, allowing current to flow (Logic High/Low depending on pull-up configuration). 2. **Trigger State:** When the tool touches the probe, the internal contact lifts, breaking the circuit instantly. 3. **Safety:** Because it is **Normally Closed (NC)**, if a wire is cut or the sensor fails, the CNC machine will register an "alarm" state, preventing crashes. --- ## 3. Key Components ### The Contact Head Usually made of **Tungsten Carbide** or **Hardened Stainless Steel**. This part must be electrically conductive if the system uses electrical continuity sensing, though the M2RT series primarily relies on a high-precision mechanical break. ### The Spring Mechanism The internal spring is calibrated to ensure that the probe returns to the exact same "zero" position every time, which is how the **1-micron repeatability** is achieved. ### LED Indicator (Optional in some variants) Some versions include a built-in LED that glows when the probe is triggered, allowing for visual confirmation during the setup process. --- ## 4. Usage in CNC Systems The M2RT series is used for: * **Tool Length Compensation:** Automatically updating the offset in the CNC control. * **Tool Wear Monitoring:** Detecting if a tool has worn down over a long production run. * **Breakage Detection:** Stopping the machine if a drill or endmill has snapped.