The **M2AS1-4212-R2** is a specific model of a **Step-Servo Motor (Integrated Motor)** produced by **Leadshine**. This device is part of the iST series, which combines a high-performance digital stepper driver with a 2-phase stepper motor and an internal encoder into a single unit. --- ### ## Technical Specifications Overview Below are the primary electronic and mechanical characteristics of the M2AS1-4212-R2: | Feature | Specification | | :--- | :--- | | **Motor Type** | Integrated Step-Servo (Closed-loop) | | **Frame Size** | NEMA 17 (42mm) | | **Input Voltage** | 24 - 36 VDC | | **Holding Torque** | 0.45 N.m (approx. 63.7 oz-in) | | **Encoder Resolution** | 1000 Lines (4000 counts/rev) | | **Control Signal** | Pulse / Direction (PUL/DIR) | | **Shaft Diameter** | 5mm | --- ### ### Key Electronic Components & Features The "R2" designation often refers to a specific revision or communication interface standard. Here is the breakdown of the internal electronics: #### 1. Integrated Driver Stage Unlike traditional stepper motors that require an external controller box, the driver is mounted to the rear of the motor. It uses **32-bit DSP technology** to calculate current loops and position loops in real-time. This eliminates the need for long motor cables, reducing **Electromagnetic Interference (EMI)**. #### 2. Closed-Loop Feedback (Encoder) The "Servo" part of the name comes from the built-in optical or magnetic encoder. * **No Position Loss:** The driver monitors the shaft position constantly. If the motor stalls, it can trigger an alarm. * **Reduced Heat:** The electronics adjust the current based on the actual load, meaning the motor runs much cooler than a standard "open-loop" stepper. #### 3. I/O Interface (Signal Pins) The electronic interface usually consists of the following signal types: * **PUL+ / PUL-:** Pulse signal for speed control. * **DIR+ / DIR-:** Directional signal for rotation. * **ENA+ / ENA-:** Enable/Disable signal to lock or release the motor shaft. * **ALM+ / ALM-:** Fault output (Logic signal to the PLC/Controller if an error occurs). #### 4. Microstep Configuration The internal electronics allow for high-resolution microstepping (up to 25,600 steps per revolution), which ensures smooth motion and reduces resonance at low speeds. --- ### ### Applications Due to its compact size and integrated nature, the M2AS1-4212-R2 is commonly used in: * **3D Printers** (Industrial grade) * **Medical Lab Equipment** * **Electronic Assembly Machines** * **Small CNC Plotters** ---