High-Dynamic AC Servo: MAC112C-0-ED-2-C/130-B-0 from Indramat for Synchronous Motion Control
In high-performance industrial automation, where precision, speed, and coordination define productivity, the choice of servo motor is rarely about torque alone—it’s about dynamic responsiveness, thermal resilience, and seamless integration into synchronized motion architectures. The Indramat MAC112C-0-ED-2-C/130-B-0 exemplifies this philosophy: a high-dynamic, permanent-magnet AC servo motor engineered for applications demanding sub-millisecond response, exact position repeatability, and robust operation under continuous cyclic loads. As part of Bosch Rexroth’s legacy Indramat portfolio—still widely deployed and supported in packaging, printing, robotics, and machine tooling—this motor continues to deliver exceptional performance in systems where timing is everything and synchronization is non-negotiable.
Engineering for High Dynamics and Thermal Endurance
The MAC112C series belongs to Indramat’s renowned MAC (Modular AC) family, designed with a focus on power density and dynamic behavior. The specific variant MAC112C-0-ED-2-C/130-B-0 features a 130 mm frame size, offering a balanced combination of inertia, torque, and speed suitable for mid-to-high inertia loads.
Key technical attributes include:
High overload capacity: Capable of delivering up to 3× continuous torque for short durations, enabling rapid acceleration and deceleration cycles.
Low rotor inertia: Optimized electromagnetic design minimizes rotational mass, improving system bandwidth and reducing settling time.
Integrated resolver feedback (standard): Provides absolute position data with high noise immunity—critical in electrically harsh environments near VFDs or welding equipment.
Natural convection cooling with optional forced ventilation: The “B-0” suffix denotes a smooth shaft without keyway, while the thermal class supports continuous operation at S1 duty cycle or intensive S3/S6 cyclic modes.
IP65 protection rating: Sealed against dust and water jets, making it suitable for washdown areas in food processing or outdoor machinery.
Precision-balanced rotor (G2.5 grade): Ensures minimal vibration even at rated speeds exceeding 3000 rpm.
Crucially, the motor’s mechanical and electrical parameters are tightly matched to Indramat’s DKC or HFE drive families, enabling auto-tuning, adaptive current control, and real-time monitoring of winding temperature via embedded thermal models.
Synchronous Motion Control: Where Timing Equals Quality
Synchronous motion—whether electronic line shafting in printing presses, coordinated pick-and-place in assembly cells, or gantry axis coupling in laser cutters—relies on nanosecond-level alignment between multiple axes. The MAC112C-0-ED-2-C/130-B-0 excels here due to its deterministic torque response and low cogging torque (<2% of peak torque), ensuring smooth velocity profiles even at low speeds.
When paired with an Indramat drive supporting SERCOS I/II or analog ±10 V command interfaces, the motor becomes part of a closed-loop system capable of:
Electronic gearing with master-slave jitter <10 µs
Flying shear or rotary cutoff with positional accuracy ±0.05°
Contouring motion with path deviation <0.1 mm
“On our label-gluing machine, four MAC112C motors must rotate in perfect sync at 2400 rpm,” explains a controls engineer at a European packaging OEM. “Any phase drift causes misalignment and product waste. With Indramat’s current-loop tuning and resolver feedback, we’ve achieved zero timing error over 18 months of 24/7 operation.”
Real-World Deployments Across Demanding Industries
Case Study 1: Flexographic Printing Press
A 10-color press uses MAC112C motors on each print station for web tension control and plate cylinder registration. The motors’ low inertia allows instant compensation for substrate stretch, while resolver feedback ensures color-to-color register accuracy within ±0.02 mm. “Downtime due to misregistration dropped by 90% after switching from stepper-based systems,” notes the production manager.
Case Study 2: Automotive Component Assembly Cell
In a robotic cell assembling turbocharger housings, two MAC112C units drive synchronized linear actuators that clamp parts during laser welding. The high dynamic response enables a 1.8-second cycle time, while thermal monitoring prevents overheating during extended runs. “We run 22 hours/day—reliability is non-negotiable,” says the plant automation lead.
Case Study 3: Pharmaceutical Blister Packaging Line
Here, the motor drives a camless indexing mechanism that advances blister cards with millisecond precision. Its smooth torque delivery eliminates mechanical shock, protecting fragile tablets. “The absence of mechanical cams reduced maintenance by 70%,” reports the facility’s engineering supervisor.
Expert Recommendations for Optimal Integration
“A high-dynamic motor like the MAC112C demands a holistic approach,” advises a senior Bosch Rexroth field application engineer. He offers three best practices:
Match drive bandwidth to mechanical resonance: Use the drive’s notch filters or dual-loop control (if using external encoders) to suppress structural vibrations.
Ensure proper grounding and shielding: Resolver cables must be twisted-pair and shielded, with shields grounded only at the drive end to avoid ground loops.
Monitor winding temperature via software: Even without physical sensors, modern Indramat drives estimate thermal state using I²t models—use this data for predictive maintenance.
Additionally, when retrofitting older machines, verify mechanical compatibility: the “C/130” designation indicates a 130 mm flange with standard IEC B5 mounting dimensions.
Legacy Strength, Ongoing Support
Though Indramat as a brand has been integrated into Bosch Rexroth’s broader automation portfolio, the MAC112C series remains fully supported. Replacement units, repair services, and firmware updates are available globally, and the motor’s open interface standards ensure compatibility with third-party drives when necessary. This longevity makes it a sound choice for both brownfield upgrades and new builds requiring proven reliability.
Conclusion: Precision Engineered for the Rhythm of Production
The Indramat MAC112C-0-ED-2-C/130-B-0 is more than a servo motor—it is a precision instrument calibrated to the tempo of modern manufacturing. In applications where every microsecond of lag translates to scrap, and every degree of misalignment risks quality, this motor delivers the dynamic fidelity and robustness that engineers trust. Far from being obsolete, it stands as a testament to enduring German engineering: uncompromising in performance, resilient in operation, and perfectly attuned to the demands of synchronous motion control. For those building or maintaining high-speed, high-accuracy machinery, the MAC112C isn’t just a component—it’s the heartbeat of precision.