Siemens 1FK7022-5AK71-1LH3 0.1kW High-Precision Servo Motor for Demanding Motion Control Applications in Industrial Automation

Siemens 1FK7022-5AK71-1LH3 Servo Motor: Technical Deep Dive

Siemens' 1FK7022-5AK71-1LH3 represents a high-precision component within the SIMOTICS S-1FK7 series of synchronous servo motors, engineered for demanding motion control applications. Designed for seamless integration with the SINAMICS S120 drive system, this motor exemplifies Siemens' commitment to performance, flexibility, and robustness in industrial automation1.

1. Core Technical Specifications & Performance

This compact yet capable servo motor delivers an output power of 0.10 kW and achieves remarkable rotational speeds up to 6000 rpm. Its frame size adheres to the IMB 5 standard (compatible with mounting types IM V1 and IM V3), making it suitable for space-constrained installations. Key performance characteristics include:

• High Dynamic Response: Enables rapid acceleration and deceleration for precise positioning.

• Smooth Shaft Operation: Features a smooth shaft with tolerance class N ensuring reliable coupling and minimal vibration1.

• Integrated Braking: Incorporates a parking brake for safety and holding torque applications, crucial for vertical axes or emergency stops1.

Technical Specifications Table:

2. Mechanical Design & Environmental Protection

The motor boasts a robust mechanical construction. Its IP64 protection rating signifies comprehensive defense against dust ingress and water splashes from any direction, making it resilient in challenging industrial environments like machine tools, packaging, or food and beverage production1. The slightly lower IP54 rating at the flange is typical for joint areas but the overall system integrity is maintained at IP64. The RAL 7016 dark grey paint provides a durable and corrosion-resistant finish. The rotatable (270°) power and signal plugs offer significant flexibility during installation, allowing optimal cable routing to minimize strain and improve cabinet organization1.

3. High-Resolution Encoder & Drive-CLiQ Integration

A defining feature is its integrated high-resolution absolute encoder (AM20DQ type). This system provides an exceptional 20 bits per revolution (1,048,576 positions/rev) single-turn resolution, coupled with 12-bit multi-turn capability (4,096 revolutions). This delivers several critical advantages:

• Absolute Positioning: Eliminates the need for homing routines after power-up, maximizing machine availability.

• Ultra-High Precision: Enables extremely fine position and speed control for demanding applications.

• Multi-Turn Tracking: Essential for applications involving long travel distances with lead screws or where multiple revolutions are common.

• Drive-CLiQ Interface: Provides a fully digital, high-speed communication link directly to SINAMICS S120 drives. This enables:

  • Automatic configuration (plug-and-play) of the motor/encoder on the drive.

  • Real-time transmission of position, speed, and diagnostic data.

  • Enhanced system diagnostics and condition monitoring capabilities.

  • Simplified cabling (single cable per Drive-CLiQ node for comms + encoder power).

The incorporation of this sophisticated encoder system does result in a slight power derating of approximately 10% compared to otherwise identical motors without this encoder1, a necessary trade-off for the precision gained.

4. Target Applications & System Integration

The 1FK7022-5AK71-1LH3 is engineered for applications demanding compact size, high precision, and dynamic response:

• Machine Tool Axes: Feed drives on small CNC milling machines, grinding machines, or EDM machines requiring precise positioning.

• Packaging Machinery: High-speed pick-and-place units, filling heads, cutting stations, and labeling systems.

• Material Handling: Conveyor belt drives, small robotic arms (e.g., SCARA, delta), sorting gates.

• Automated Assembly: Precision screwdriving, small part insertion, testing equipment.

• Printing & Converting: Registration control, nip drives, winders/rewinders.

• Medical Devices: Diagnostic equipment, sample handling systems.

Its native compatibility with the SINAMICS S120 drive system creates a powerful motion control solution. The S120 provides advanced servo control algorithms, comprehensive safety functions (e.g., STO, SS1, SLS), and seamless integration into higher-level automation systems like SIMATIC via PROFINET or PROFIBUS. The Drive-CLiQ connection ensures optimal performance tuning between the drive and this specific motor.

5. Advantages Summary

• Compact Power Density: 0.10kW output in a small IMB5 frame.

• High-Speed Capability: 6000 rpm operational range.

• Exceptional Precision: 20-bit + 12-bit absolute encoder enables sub-arc-minute positioning.

• Robustness: IP64 protection and RAL 7016 coating ensure durability in harsh environments.

• Integrated Safety: Parking brake provides reliable holding.

• Simplified Integration: Drive-CLiQ plug-and-play, rotatable connectors, and standard mounting.

• Digital Connectivity: Foundation for Industry 4.0 diagnostics and condition monitoring via Drive-CLiQ.

The Siemens 1FK7022-5AK71-1LH3 exemplifies modern servo motor technology, balancing compact dimensions with high performance and intelligence. Its integration of a cutting-edge absolute encoder via Drive-CLiQ makes it a future-proof choice for OEMs and system integrators building high-precision, automated machinery where reliability, accuracy, and rapid commissioning are paramount. While its power rating is modest, its strengths lie in precision, speed, and seamless integration within the comprehensive Siemens Totally Integrated Automation (TIA) ecosystem.