In the fields of optical precise positioning, laser scanning, semiconductor inspection and automated assembly, 360° high-precision continuous rotation and angle closed-loop control are the core factors determining the accuracy and stability of the system. The 7SRA5100B closed-loop electric rotating platform from Saifan Optoelectronics uses closed-loop feedback control + precise worm gear and worm + hollow rigid structure to completely solve the problems of "step loss, drift, and unstable accuracy" in open-loop rotating platforms, making it a reliable choice for precise rotating positioning. 

Closed-loop servo drive, micrometer-level angle control, eliminating step loss and drift

The 7SRA5100B is equipped with a high-performance closed-loop stepper motor + encoder real-time feedback system, forming a "command - execution - verification - compensation" full closed-loop control, completely eliminating the step loss, cumulative errors and positioning drift of traditional open-loop turntables. The angle resolution is as high as 0.001°, and the repeat positioning accuracy can reach ±0.005°. Combined with high-precision subdivision drive, it realizes extreme delicate angle fine-tuning, meeting the requirements of optical focusing, precise rotation, laser scanning and other micro-angle adjustment. 

Standard equipped with RS232/DB9 interface, compatible with SAVAN 7SC series motion controllers. It supports 360° continuous rotation, origin return, limit protection, multi-axis linkage. It can be quickly integrated into the automation system to achieve programming positioning, remote control and process integration. The closed-loop system monitors position deviations in real time and dynamically compensates. Even under variable speed and load fluctuation conditions, it can maintain precise angles, stable operation, without lag or deviation. 

Hollow rigid structure, large diameter with high load capacity, smooth rotation without jitter.

The body adopts a hollow high-strength aluminum alloy design combined with cross roller bearings. The tabletop diameter is Ø100mm, and the central hole is Ø30mm. This design facilitates the passage of optical paths, cable routing, or component installation, and is suitable for scenarios requiring central light transmission, such as optical systems and laser equipment. The overall structure has been optimized for rigidity, with strong resistance to uneven loading and vibration. The maximum load capacity can reach 50N, and it can stably support optical lenses, precision sensors, and small modules, etc. The full rotation process is smooth without jamming, jumping, or noise. 

The core drive adopts a precise worm gear and worm pair. It undergoes quenching, fine grinding and pre-pressing for gap elimination treatment, resulting in zero backlash, high rigidity and smooth transmission. This effectively reduces vibrations and tremors during the rotation process, ensuring the stability of the optical system. The tabletop is made of ferromagnetic stainless steel, compatible with 7MBM magnetic bases, and can quickly fix workpieces or fixtures. The base is equipped with standard installation holes, suitable for optical platforms and equipment racks, making the installation convenient and highly compatible. 

Stable and durable throughout all working conditions, suitable for various precision scenarios

The body is made of aluminum alloy and stainless steel sealed structure, with excellent dust-proof, laser radiation-proof, and heat chip erosion-resistant capabilities. It can adapt to complex working conditions such as laboratories, laser processing workshops, and semiconductor clean rooms, and will not deform or wear out even after long-term use. The closed-loop motor and encoder adopt industrial-grade protection design, with long service life and no maintenance required, significantly reducing operation and maintenance costs, and suitable for automated production lines and scientific research experiments that require long-term continuous operation. 

Core parameters and typical applications

Table top diameter: Ø100mm 

Center through hole: Ø30mm 

Rotation range: 360° continuous rotation 

Angle resolution: 0.001° (8 subdivisions) 

Repeatability positioning accuracy: ±0.005° 

Maximum load: 50N 

Drive method: Closed-loop stepper motor 

Communication interface: RS232 (DB9) 

Typical applications: optical system angle calibration, laser scanning and marking, semiconductor wafer inspection, precise part indexing, automated assembly, biomedical instruments, etc. 

Sevan Optoelectronics' 7SRA5100B closed-loop electric rotating platform, with its four core advantages of closed-loop control precision, hollow large aperture, high-load stability rotation, and stable durability, has redefined the performance standards of small precision rotating platforms. Choosing 7SRA5100B means choosing accurate angles, stable operation, and reliable control, enabling precise and controllable rotation positioning every time, and helping to achieve breakthroughs in scientific research and upgrade industrial precision.