In the fields of precise optical inspection, semiconductor packaging, photovoltaic research and development, and micro-device integration, the contradiction between "space limitation" and "high precision and heavy load" has always been a pain point for the industry. Traditional translation stages are either bulky and difficult to integrate, or lack sufficient precision to meet the demanding requirements. Sifan Optoelectronics has been deeply engaged in the field of precise opto-mechanical engineering for 22 years. It has匠心crafted the 7STA02B series of "Lingrong" electric translation stages， with a core design of "compact closed-loop design + high rigidity heavy-load structure + micrometer-level precise control". This redefines the performance benchmark for compact displacement stages and provides a perfect solution for precise displacement requirements in limited spaces. 

As the flagship product of Sifan Optoelectronics' compact closed-loop translation stages， 7STA02B focuses on small size， high precision control， heavy load capacity， and multiple modes of selection. The travel range covers 25mm - 200mm， perfectly adapting to dense optical paths and micro-device integration. The product breaks through the bottleneck of traditional closed-loop translation stages "high precision requires large volume"， adopting an integrated compact body design， with a height reduced by 35% compared to similar products， and a self-weight of only 2.8 - 4.2kg (depending on the travel range)， yet equipped with a full closed-loop optical grating feedback system - an internal high-precision optical encoder that captures displacement deviations and dynamically corrects them， completely eliminating the step error of open-loop control， achieving a positioning accuracy of ±0.003mm， a repeat positioning accuracy of less than 0.002mm， a resolution of up to 0.001mm， and achieving the ultimate breakthrough of "millimeter volume， micrometer precision"， perfectly adapting to high-precision scenarios such as spectral scanning， fiber coupling， and micro-device detection. 

The core transmission and structural design have forged the core strength of heavy-load stability and long-term durability. 7STA02B adopts an imported precision ball screw + cross roller guide rail golden combination， combined with three-bearing installation and shaft end locking structure， effectively preventing screw loosening during high-speed reciprocating motion. The transmission efficiency is high， and there is no gap in operation. The guide rail has a pre-tightening gap elimination structure， smooth movement without jamming， excellent linearity， and a load-bearing capacity far exceeding products of the same size. The center load can reach 12kg， and it can easily accommodate heavy components such as optical lenses， integrating balls， and spectrometer probes. Even under full-load operation， the platform jump is still <0.5μm， completely solving the industry pain point of "weak load and prone to deformation" for compact translation stages. The body is made of high-strength aluminum alloy， processed by natural aging treatment and hard anodizing， featuring lightweight and high rigidity， excellent shock resistance and moisture-proof performance， capable of adapting to long-term continuous operation in laboratories and high-frequency operations in industrial production lines， with a service life of 30，000 hours， 50% higher than the industry average. 

Minimalist integration and intelligent control， balancing automation compatibility and operational convenience. 7STA02B adopts a modular design， with standard installation holes reserved on the body， supporting horizontal， vertical， and inverted installation methods. It can be directly fixed on the optical platform and can also be flexibly combined with other translation stages to build multi-dimensional adjustment frames， quickly integrating into dense optical paths and micro-devices. It is equipped with 42 stepper motors and standard RS232/USB interfaces， seamlessly compatible with Sifan's 7SC series motion controllers， supporting synchronous linkage of multiple devices， programming positioning， and the establishment of automated testing processes， compatible with LabVIEW and Python programming environments， plug-and-play， with an integration time shortened by 40% compared to similar products. The motor and screw are connected through an imported elastic coupling， synchronous transmission， low noise (<45dB)， no loosening during long-term operation； both ends are equipped with zero position and limit switches， supporting quick reset and over-travel protection， balancing positioning efficiency and equipment safety； an adjustable handwheel is built-in， allowing manual fine-tuning after power failure， balancing automation efficiency and manual debugging flexibility. Full-scenario compatibility, covering the entire fields of scientific research innovation and industrial precision manufacturing. In the field of scientific research, it is compatible with university material characterization, optical experiments, and micro-device development, and can be used in combination with fiber optic spectrometers and LED sunlight simulators to build a micro-opto-mechanical integrated testing platform; in the fields of photovoltaics and optics, it is used for the displacement of solar cell micro samples, precise alignment of optical components, and optical path calibration, ensuring accurate and reliable test data; in the semiconductor and microelectronics fields, it meets the positioning requirements of chip detection, micro-device assembly, and precise bonding, protecting product yield with a small volume and high precision; in the industrial automation field, it is compatible with portable detection equipment and micro-processing machines' displacement modules, supports customized upgrade of servo motors, and realizes high-speed and high-precision operation. 

Sevan Optics, as a leading brand of domestic precision optical equipment, has always adhered to the concept of "core self-innovation, meticulous manufacturing, and service first". The 7STA02B series continues the brand's high reliability and high compatibility genes, with all core components self-developed, performance comparable to imported similar products, a 40% reduction in full life cycle cost, and provides a 4-hour rapid response local after-sales service and 3-year core component warranty service, significantly reducing user usage and maintenance costs. 

With a slender body and powerful performance; closed-loop precise control, no worries about heavy loads. Sevan Optics' 7STA02B series electric translation stage, with its compact closed-loop design, micrometer-level high-precision positioning, 12kg heavy-load capacity, and full-scenario flexible integration, becomes the benchmark choice in the field of compact precision positioning, providing solid and reliable displacement support for scientific research innovation and industrial precision manufacturing, helping users break through spatial limitations in high-end optics, semiconductor, and photovoltaic fields, and achieving "precise displacement freedom in small spaces".