The **KTS-3D-R/CE** (also known as the **KTS-3D-R**) is a high-precision 3D touch probe manufactured by **Kaman Precision Products** (or under the Tschorn brand in European markets). It is primarily used on CNC milling machines and machining centers to detect workpiece edges and measure surfaces. Below is an explanation of its electronic components and technical specifications. --- ## 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Input Voltage** | 12V to 30V DC | | **Output Signal** | PNP (Normally Closed / NC) | | **Repeatability** | < 0.001 mm (1 micron) | | **Protection Class** | IP67 (Waterproof/Coolant proof) | | **Cable Length** | Usually 3m to 5m (depending on configuration) | | **Switching Distance** | Minimal (Contact-based) | --- ## 2. Core Electronic Components The KTS-3D-R/CE operates as a sophisticated **electro-mechanical switch**. Unlike simple mechanical probes, the "CE" (Electronic) version uses active circuitry to ensure signal stability. ### A. The Kinematic Switch (Tripod System) The heart of the probe is a three-point contact system (often called a kinematic seat). * **How it works:** Three gold-plated rods rest on three pairs of spheres. * **Electronic Function:** These contacts are wired in series. When the stylus touches an object, the "tripod" is slightly disturbed, breaking the electrical circuit instantly. ### B. Signal Processing Circuitry The probe contains an internal PCB (Printed Circuit Board) that: * **Debounces the Signal:** Prevents "chatter" or false triggers caused by machine vibrations. * **Voltage Regulation:** Allows the probe to operate reliably across a wide range of DC voltages (12-30V). * **PNP Output Logic:** When the probe is triggered, it switches the output state, allowing the CNC Controller (Fanuc, Haas, Siemens, etc.) to capture the exact coordinates. ### C. LED Status Indicator The housing typically includes an integrated LED: * **Green:** Powered and in a "Ready" state (Closed circuit). * **Red:** Triggered / Stylus deflected (Open circuit). --- ## 3. Wiring Diagram (Generic) The probe typically uses a 3-wire or 4-wire shielded cable. ```yaml Wire Color | Function | Description -----------|---------------|---------------------------------- Brown | VCC (+) | +12V to +30V DC Power Supply Blue | GND (-) | 0V / Common Ground Black | Signal (OUT) | PNP Output (Signal to CNC Input) White/Grey | Shield | Earth Ground (Noise reduction) ``` --- ## 4. Operational Protection Because the probe operates in an environment full of metal chips and conductive coolant, its electronics are protected by: * **O-Ring Seals:** Preventing liquid ingress into the electronic chamber. * **Rubber Bellows:** Protecting the mechanical-to-electronic interface at the stylus base. * **Short Circuit Protection:** Most "CE" models include internal fuses or thermal protection to prevent damage if wired incorrectly.