The **M2AC-AZ6-R2/Q** is a high-precision, industrial-grade magnetic encoder system component, typically manufactured by companies like **Renishaw**. It is part of the **M2** series used for incremental linear or rotary position feedback. --- ### 1. Technical Specifications The part number breaks down into specific electronic and mechanical characteristics: | Component Feature | Description | | :--- | :--- | | **Series** | **M2**: Miniature magnetic encoder series. | | **Input Voltage** | **AC**: Typically indicates 5V DC power requirement (standard for TTL). | | **Output Signal** | **AZ6**: Digital TTL Differential (RS422) with a specific interpolation factor. | | **Resolution** | **R2**: Defines the resolution (often 2µm or specific to the magnetic scale pitch). | | **Termination** | **Q**: Indicates the connector type (often a 10-pin JST or specific micro-connector). | --- ### 2. Core Electronic Parts & Functionality The device acts as a **transducer**, converting magnetic field variations into electrical pulses. #### A. The Magnetoresistive Sensor Inside the readhead are sensors that detect the magnetic poles of a scale (the actuator). As the head moves, these sensors produce sine and cosine analog signals. #### B. Interpolation Circuitry The "AZ6" designation refers to the internal ASIC (Application-Specific Integrated Circuit) that performs **interpolation**. * **Function:** It takes the raw analog sine/cosine signals and subdivides them into smaller increments. * **Result:** This allows the system to achieve sub-micron or low-micron resolution from a relatively coarse magnetic scale. #### C. Signal Drivers (RS422) The electronics include differential line drivers. * **Signals:** A+, A-, B+, B-, and Reference Mark (Z+, Z-). * **Benefit:** Differential signaling provides high **Electromagnetic Interference (EMI) immunity**, essential in industrial environments with large motors. --- ### 3. Connection and Pinout (Standard 'Q' termination) The "Q" termination usually follows a standard industrial pinout for TTL encoders: | Pin Number | Signal | Function | | :--- | :--- | :--- | | 1 | 5V | Power Supply | | 2 | 0V (GND) | Ground | | 3 | A+ | Incremental Channel A | | 4 | A- | Inverted Channel A | | 5 | B+ | Incremental Channel B | | 6 | B- | Inverted Channel B | | 7 | Z+ | Index/Reference Mark | | 8 | Z- | Inverted Reference Mark | --- ### 4. Key Application Use-Cases * **Robotics:** Providing joint position feedback. * **CNC Machining:** Feedback for linear stages in harsh environments (magnetic encoders are immune to oil, dust, and water). * **Medical Equipment:** Compact size allows integration into surgical robots or imaging beds. ---