As vehicle body sizes continue to expand, the working limits of traditional robots are facing unprecedented challenges. How to maintain ultimate precision and efficiency within a larger physical space has become a critical question for the entire industry.
Following the remarkable success of the SR220A Series in main production lines of automotive OEMs, Siasun has once again pushed beyond limits and launched an upgraded model of the same series — the SR220A-125/3.10, a new-generation heavy-duty robot with an ultra-long reach of 3100mm.
Siasun welcomes a new member to the SR220A Series!
Born to Break Boundaries
3100mm: Defining a New Scale of Reach
In automotive welding workshops, robot reach often determines the layout logic and cost structure of production lines.
Facing the increasingly complex body structures of large SUVs, MPVs, and commercial vehicles, traditional-reach robots usually require additional moving axes or extra stations to cover all welding points. This not only increases equipment investment but also slows down production tact time.
The 3100mm ultra-long-reach robot launched by Siasun is designed to break this physical constraint:
Full Coverage
With a 3100mm extended reach, a single robot can easily cover an ultra-wide area from the roof to the chassis. In large-body welding, it significantly reduces the number of robots and external axis configurations, optimizes line layout, and lowers the total cost of ownership.
Deep-Cavity Operation
Targeting the pain points of complex internal body structures and hard-to-reach deep cavities, the extended-arm design delivers stronger accessibility. It handles spot welding in narrow spaces and material flow across stations with ease.
Powerful Core
Long Arms Deliver High Precision
Extending the reach poses extreme tests on rigidity, dynamic performance, and control algorithms. Many brands suffer from severe end-of-arm shaking, reduced precision, and slower tact time after lengthening the arm.
Based on proprietary core technologies, Siasun has perfectly resolved the contradiction between “length” and “stability”:
Ultimate Rigidity
The 5th axis adopts a backlash-eliminating gearbox structure, boosting overall rigidity by 17%. Equipped with high-torque wrists and custom high-inertia motors from a domestic brand, the allowable end inertia is increased by 8%. It effectively offsets torque fluctuations caused by long arms, ensuring micron-level end vibration even under full-load operation.
Intelligent Control Algorithms
Powered by Siasun’s self-developed high-performance controller, with NURBS transition and variable-speed & variable-acceleration planning, the robot achieves smooth trajectory and rapid start-stop even over the full 3100mm stroke. Spot-welding tact time is improved by more than 11%, perfectly matching the high-output demands of automotive OEMs.
Sustained Precision
Repeat positioning accuracy of ±0.06 mm. It ensures absolutely stable trajectories under the impact of high-speed spot welding or sudden load changes during heavy-duty handling.
Deep Scenario Application
Empowering Upgrading of the Entire Automotive Industry Chain
This 3100mm-reach “all-rounder” focuses on four core application scenarios:
Body-in-White Stud Welding
Specially designed for large-size body parts, solving wide-range stud welding challenges for roofs, side frames, and floors. No external axes are needed, improving the overall efficiency of welding lines with fewer robots.
High-Speed Sheet Handling
The 3.1m reach easily adapts to the diagonal length of large flat glass, stone panels, and wood boards. The high-inertia end motor guarantees smooth, shake-free trajectories even under high acceleration, efficiently completing large-range handling and precise positioning.
High-Speed Sheet Metal Stamping
Provides flexible, stable, and efficient solutions for stamping loading & unloading of medium-sized sheet metal parts such as automotive covers and door panels. Paired with dedicated stamping process packages, it fits single-press or multi-press flexible stamping lines, supporting mixed-flow production of multi-variety, small-batch parts.
Precision Continuous Gluing
In body sealing, windshield gluing, and other processes, the long reach enables long-distance, continuously smooth operation paths, ensuring uniform adhesive beads and greatly improving vehicle sealing and appearance.
Ready for Multiple Industrial Scenarios
From 2660mm to 3100mm, behind this numerical leap lies Siasun Robotics’ firm confidence in the future of China’s automotive intelligent manufacturing.
Relying on continuous technological innovation and product iteration, Siasun will keep improving its robot product matrix, deeply integrating into the full manufacturing chain of various industries with dual advantages of “hard tech + soft power”, and injecting new momentum into the high-quality development of the manufacturing industry!
