The SERVO DYNAMICS MTS30M4-38B is a high-performance, brushless AC servo motor, a key component within Servo Dynamics’ (now often part of larger motion control corporations like Parker Hannifin or other specialized entities) legacy portfolio of precision motion control solutions. This motor is engineered to deliver precise torque, speed, and position control in demanding industrial automation applications. As a brushless design, it offers superior reliability, lower maintenance, and higher efficiency compared to brushed DC servos, as it eliminates the physical commutator and brushes that are prone to wear. The «MTS» designation typically indicates a motor series with specific mechanical and electrical characteristics, while «30M4-38B» details the frame size, stack length, winding configuration, and potentially feedback device type. This motor is designed to be paired with a compatible digital servo drive/amplifier, which provides the controlled three-phase AC power necessary to energize the motor’s stator windings and precisely interpret the rotor position feedback for commutation.
The primary value of the SERVO DYNAMICS MTS30M4-38B lies in its ability to provide dynamic, responsive, and accurate mechanical motion. It excels in applications requiring rapid acceleration/deceleration, high torque at low speeds, or precise positioning. The motor typically incorporates a high-resolution feedback device, such as a resolver or encoder (as suggested by the suffix ‘B’), which is essential for the drive to accurately control rotor position. In systems like CNC machine tools, semiconductor manufacturing equipment, printing presses, and automated assembly lines, the MTS30M4-38B serves as the critical actuator that translates electrical control signals into precise mechanical work, directly impacting throughput, quality, and repeatability. Its robust construction is designed to withstand the rigors of industrial environments, including exposure to dust, chips, and intermittent overloads.
Technical Specifications
Parameter Name
Parameter Value
Product Model
SERVO DYNAMICS MTS30M4-38B
Manufacturer
Servo Dynamics Corporation (Legacy)
Product Type
Brushless AC Servo Motor
Frame Size
Likely NEMA 34 (3.4″ / 86mm) or metric equivalent, as suggested by «30» in the model.
Continuous Stall Torque
Specific to the M4-38 winding, typically in the range of 3 to 8 Nm (e.g., 4.8 Nm, 6.7 Nm).
Peak Torque
Significantly higher than continuous torque, for acceleration (e.g., 2-3 times continuous torque).
Rated Speed
Typically 1500, 2000, or 3000 RPM, depending on the specific «-38B» winding and voltage constant.
Rated Current
Dependent on torque constant (Kt), typically several Amperes RMS.
Voltage Constant (Ke)
Specific to the «-38» winding, defining the back-EMF generated per 1000 RPM.
Torque Constant (Kt)
Specific to the «-38» winding, defining the torque produced per Ampere of current (e.g., Nm/A).
Feedback Device
Likely a resolver («B» may denote resolver feedback), or a high-line-count encoder. Provides absolute or incremental rotor position.
Insulation Class
Class B, F, or H standard, for thermal robustness.
Protection Rating
Typically IP65 (splash and dust proof) for industrial use.
Shaft
Precision ground, often with a keyway and threaded hole for mounting couplings or pulleys.
Connector
Integral, environmentally sealed connector for power and feedback.
Key Features and Advantages
SERVO DYNAMICS MTS30M4-38B is defined by its robust construction and high dynamic performance. The motor is built with high-grade laminated steel and rare-earth (e.g., Neodymium-Iron-Boron) permanent magnets on the rotor, which yield a high torque-to-inertia ratio. This allows for very rapid acceleration and deceleration, which is critical for reducing cycle times in pick-and-place, indexing, and contouring applications. The brushless design is a fundamental advantage, offering maintenance-free operation, no brush arcing (suitable for clean or volatile environments), and the ability to run at higher speeds continuously.
MTS30M4-38B
Precision feedback and thermal management are core to its reliable operation. The integrated high-quality resolver or encoder provides accurate, real-time rotor position data to the servo drive, enabling precise sinusoidal commutation for smooth torque production even at very low speeds. The motor is designed for effective heat dissipation, with an optimized cooling fin design on the frame. High-class insulation on the stator windings allows it to handle intermittent peak torques and higher continuous power without thermal damage, ensuring long service life.
Application versatility and mechanical compatibility enhance its value. The motor features a standardized NEMA or metric flange mounting pattern, making it easy to integrate with a wide range of gearboxes, couplings, and lead screws commonly used in automation. Its shaft is designed to handle significant radial and axial loads. For system integrators and maintenance technicians dealing with legacy Servo Dynamics systems, the MTS30M4-38B represents a known, reliable component. Its performance specifications allow it to be a potential replacement or upgrade for older brushed servo motors, bringing improved reliability and performance to existing machinery. While newer motor technologies exist, this model embodies the solid engineering that made brushless servos the industry standard for high-performance motion control.
Application Areas
The SERVO DYNAMICS MTS30M4-38B brushless servo motor was designed for and deployed in a wide array of industrial automation applications demanding precise, responsive motion.
In factory automation and robotics, it is commonly found as the actuator for axes in Cartesian gantry systems, SCARA robots, and delta pickers, handling tasks like component placement, palletizing, and material transfer. Within packaging and converting machinery, it drives cut-off knives, sealing jaws, flying shears, and web tensioning systems, where synchronized motion is key to product quality.
For machine tools (CNC milling, turning, grinding), it can serve as a feed drive for axes or as a spindle motor for auxiliary tool changers or C-axis control, providing the stiffness and responsiveness needed for accurate positioning. In printing and paper handling equipment, it controls the rotation of print cylinders, paper feed rollers, and slitter positioning, requiring smooth torque across a wide speed range.
The motor is also suitable for semiconductor and electronics manufacturing in wire bonders, die attach systems, and test handlers. Essentially, the MTS30M4-38B is applied wherever a machine builder needed a reliable, medium-torque servo motor to provide controlled rotary motion in an automated process, particularly in machines built from the late 1980s through the 2000s.
Related Products
SERVO DYNAMICS Servo Drive/Amplifier (e.g., SD3000 series): The digital drive unit that powers and controls the MTS30M4-38B motor, executing the current, velocity, and position control loops.
SERVO DYNAMICS MTS series motors of other sizes (e.g., MTS20M, MTS40M): Smaller or larger frame motors for different torque requirements.
Gearboxes/Reducers (e.g., planetary, worm gear): Used to increase output torque and reduce speed when coupled to the servo motor.
Servo Coupling: A flexible or rigid coupling to connect the motor shaft to the load, compensating for minor misalignments.
Brake Module (optional): An electromagnetic fail-safe brake that can be added to the motor for holding a load when power is off.
Cables (Power & Feedback): Specifically designed, shielded cables to connect the motor to the drive, minimizing electrical noise.
Modern Equivalent Brushless Servo Motors (e.g., from Yaskawa, Allen-Bradley, Bosch Rexroth): Contemporary servo motors that could serve as potential upgrades or replacements, often offering higher performance, integrated safety, and modern feedback (Hiperface, EnDat).
Servo Tuning/Configuration Software: PC-based tools used to set up the servo drive parameters (gains, limits, tuning) for optimal performance with the specific motor.
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