The **M3-R** (part of the M3 series by New Scale Technologies) is a micro-linear actuator renowned for its "all-in-one" integration. It combines a piezoelectric motor, a position sensor, and a drive controller into a single, sub-miniature package. --- ### Core Electronic Components The M3-R system consists of four primary electronic sub-assemblies: | Component | Description | Function | | :--- | :--- | :--- | | **SQUIGGLE® Motor** | Piezoelectric ultrasonic motor. | Converts ultrasonic vibrations into linear motion. | | **NSE-5310 Sensor** | Magnetic linear encoder. | Provides sub-micron position feedback. | | **NSD-2101 Driver** | Integrated circuit (ASIC). | Generates the high-frequency AC drive signals. | | **On-board Processor** | Digital logic controller. | Handles PID loops and I2C/SPI communication. | --- ### Key Technical Specifications The electronics are designed for low power consumption and high precision. * **Input Voltage:** 3.3V DC (typically). * **Communication Interface:** I2C or SPI (4-wire). * **Resolution:** ~0.5 µm (closed-loop). * **Power Usage:** ~500 mW when moving; < 5 mW in standby. --- ### How the Electronics Work Together 1. **Command Input:** The user sends a target position via **I2C or SPI** to the internal microprocessor. 2. **Signal Generation:** The **NSD-2101 driver** converts the DC input into two-phase ultrasonic AC signals to vibrate the piezoelectric ceramics inside the SQUIGGLE motor. 3. **Feedback Loop:** As the motor moves, the **NSE-5310 magnetic sensor** tracks a tiny multi-pole magnetic scale attached to the moving part. 4. **PID Control:** The internal electronics compare the sensor data against the target position, adjusting the motor speed and direction in real-time until the target is reached. ### Connectivity (Pinout Example) Most M3-R modules utilize a standard FPC (Flexible Printed Circuit) connector with the following typical pin assignments: ```yaml Pin 1: VDD (3.3V) Pin 2: GND Pin 3: SCL (I2C Clock) / SCK (SPI) Pin 4: SDA (I2C Data) / MOSI (SPI) Pin 5: MISO (SPI only) Pin 6: CS (Chip Select) ``` ---