The **M2REB-SB2-R/Q** is a high-precision, industrial-grade linear encoder (often referred to as a "Magnescale" or magnetic scale) manufactured by **Magnescale Co., Ltd.** (formerly Sony Precision Technology). This component is primarily used for position detection in CNC machinery, semiconductor equipment, and precision measurement systems. --- ### 1. Key Technical Specifications Below are the primary electronic and mechanical characteristics: | Parameter | Specification Details | | :--- | :--- | | **Sensor Type** | Magnetic Linear Encoder | | **Output Signal** | A/B Quadrature (TTL Line Driver) | | **Input Voltage** | DC 5V ± 5% | | **Resolution** | Typically 0.1μm to 1μm (depends on interpolation/reader head) | | **Max. Response Speed** | High-speed capability (up to 200m/min depending on resolution) | | **Protection Class** | IP67 (High resistance to oil, water, and dust) | | **Reference Point** | Built-in zero point/Reference mark | --- ### 2. Functional Electronic Components The system consists of three main electronic "parts" or stages: #### A. The Magnetic Scale (The "M2" Series) The scale itself is a metal rod or tape magnetized with a precise pitch (usually 0.2mm). Unlike optical scales, it does not use light; instead, it utilizes magnetic flux, making it immune to coolants, oil, and metal chips. #### B. The Reader Head (Sensor) The reader head contains **Magneto-Resistive (MR) elements**. * **Bridge Circuit:** As the head moves, the MR elements detect changes in magnetic field strength. * **Analog-to-Digital Conversion:** The raw magnetic fluctuations are converted into sinusoidal signals. #### C. Signal Processing (SB2 Logic) The "SB2" designation often refers to the specific signal processing unit or cable integrated with the sensor: * **Interpolation:** Multiplies the magnetic pitch to achieve sub-micron resolution. * **Line Driver Output:** Uses an RS-422 compliant differential output. This ensures that electrical noise from factory motors does not corrupt the position data over long cable runs. --- ### 3. Connection Pinout (Typical RS-422) The device usually utilizes a high-density connector or a circular flying lead. ```text Pin/Wire Color | Signal Name | Description ---------------|-------------|---------------------- Red | Vcc (+5V) | Main Power Supply Black | GND (0V) | Ground Blue | A | Phase A Signal White | /A | Phase A Inverted Grey | B | Phase B Signal Pink | /B | Phase B Inverted Orange | Z | Zero / Reference Mark Yellow | /Z | Zero Mark Inverted ``` --- ### 4. Application Context * **Environment:** Specifically designed for "dirty" environments where optical encoders fail. * **Durability:** The electronic components are potted (sealed in resin) to withstand high vibration and thermal expansion matching that of machine tool castings. ---