Boxin · Hengzhen · Botrust
Precision Manufacturing・Powering the World
Sigma-7 Series
The Σ‑7 series is a high‑performance AC servo system, comprising SGM7‑series servo motors and SGD7S‑series drives. It covers power ratings from 50 W to 15 kW, comes standard with a 24‑bit absolute encoder, delivers a velocity loop bandwidth of up to 3.1 kHz, and supports mainstream fieldbuses such as EtherCAT. Featuring high precision, excellent dynamic performance, and robust reliability, it is widely deployed in industrial automation applications including CNC machine tools, electronic manufacturing, and packaging & logistics.
- Product Description
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I. Product Overview
The Σ-7 series is a high-performance AC servo system, comprising SGM7 Series Servo Motors and SGD7S Series Servo Drives It is a mainstream high-performance servo product in the industrial automation field, renowned for its high precision, rapid dynamic response, and exceptional reliability, and is widely deployed across a variety of precision‑control applications.
II. System Composition and Model Hierarchy
1. Servo Motor (SGM7 Series)
Based on power and inertia, it is divided into multiple sub-series to suit different application scenarios:Sub-series Positioning Power range Typical Applications SGM7J Low power, low inertia 50W~750W High-speed positioning equipment, electronic manufacturing equipment SGM7A Medium power, medium inertia 100W~3kW General automation, packaging machinery SGM7G High power, high inertia 3kW~15kW Machine tool spindles, heavy-duty equipment SGM7P Slim and compact 100W~1kW Space-constrained scenarios, small devices Model Naming Example (SGM7J-04AFC6E) ：SGM7J: Low-Power, Low-Inertia Series04: Rated power 400WA: 200V-class voltageF: With a 24-bit absolute encoderC: With oil seal6: Straight shaft, keyless grooveE: With brake
2. Servo Drive (SGD7S Series)
- Power coverage : 50W~15kW
- Control Mode : Pulse sequences, analog signals, EtherCAT/MECHATROLINK-III bus
- Security Features : Standard configuration includes STO (Safe Torque Off), supporting SIL3/PLe safety integrity level.
III. Core Technical Specifications and Performance Highlights
- High-precision positioning
- Standard configuration includes a 24-bit high-resolution absolute encoder with a single-turn resolution of 16.77 million pulses, capable of retaining position data without batteries, offering strong anti-interference performance and significantly enhancing positioning accuracy and equipment stability.
- High dynamic response
- The speed-loop frequency response reaches up to 3.1 kHz—1.5 times that of the previous generation—and supports an overload capacity of 350% of rated torque for 3–5 seconds, meeting the demands of rapid start‑stop operations. Additionally, a built-in vibration‑suppression algorithm effectively mitigates equipment resonance, enhancing operational smoothness.
- Convenient Installation and Compatibility
- The mechanical dimensions are fully compatible with the previous-generation Σ‑V series, enabling direct replacement and upgrades; it supports one-click parameter import to reduce commissioning time; and the drive’s footprint is reduced by approximately 20%, saving space in the control cabinet.
- High-reliability design
- Operating temperature range: 0–55°C; motor protection class: IP67 (for select models); drive protection class: IP20; mean time between failures (MTBF) > 100,000 hours; suitable for continuous production environments.
IV. Typical Application Scenarios
- Industrial Automation: CNC machine tools, robotic joints, automated production lines
- Electronics Manufacturing: SMT placement machines, semiconductor equipment, and testing equipment
- Packaging and Logistics: Labeling Machines, Sorting Lines, Palletizing Equipment
- Medical equipment: precision diagnostic instruments, surgical assistive devices
V. Debugging and Supporting Information
- Debugging software: Official software
SigmaWin+, supports parameter configuration, oscilloscope monitoring, and one-click tuning - Bus Support: Mainstream models support industrial Ethernet protocols such as EtherCAT, PROFINET, and Modbus TCP.
- Safety Features: Standard STO; optional safety function modules such as SS1 and SS2, compliant with industrial safety standards.
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