In the darkroom workstation for high-end optical inspection, in the sub-micron packaging workshop for semiconductor wafers, and in the high-precision characterization laboratory for cutting-edge materials science, even a deviation of 0.1 micrometers in displacement control could render a set of experiments that took months to complete invalid, and a batch of high-value precision components directly scrapped. Many engineers and researchers specializing in ultra-precision have experienced such regrets: ordinary precision translation stages gradually drift in accuracy over time, the movement is not smooth during high-speed scanning, and achieving stable sub-micron positioning often requires a cost far exceeding the budget for importing equipment.
Founded in the precision opto-mechanical field for 22 years, Sevan Optoelectronics presents its flagship product, the 7STA10 series of electric translation stages, with a core solution of ultra-precision displacement control. Using precision grinding grade lead screws and a hardcore scheme with ultra-high rigidity structure, it ensures "smoothness throughout the entire process and stable long-term accuracy" in every movement, completely breaking the industry inertia that "ultra-precision displacement can only rely on expensive imported products", and delivering a domestic answer that balances sub-micron accuracy, ultra-long lifespan, and high cost-effectiveness for research frontiers and high-end industrial scenarios.
Precision grinding lead screws underpin the sub-micron accuracy throughout the entire movement
The surface accuracy of ordinary rolled lead screws is limited, and after running for a period of time, the wear intensifies, and the return gap rapidly increases, making it impossible to support long-term stable ultra-precision displacement requirements. The 7STA10 series is equipped with high-precision grinding grade ball screws, processed through multiple precision grinding processes, with a significant improvement in screw lead accuracy, and combined with a dual pre-tightening gap elimination structure, fundamentally eliminating the return gap problem of traditional transmission structures.
Combined with a high-rigidity cross-roller guide rail, the movement is smooth without any jamming, the linear performance exceeds that of ordinary linear slider guides, the repeat positioning accuracy is stable better than ±0.001mm, the resolution can reach up to 0.0003125mm, and even within the full movement range of 50mm to 300mm, it can maintain consistent ultra-high positioning accuracy. Whether it is the uniform scanning feed of a laser interferometer or the sub-micron alignment of micro-nano optical components, even after continuous operation for tens of thousands of hours, the displacement accuracy will not show significant attenuation, truly achieving "every step is precise, every time is stable".
Ultra-high rigidity structure, stable as a rock under heavy loads
The stability of ultra-precision displacement has always relied on a solid mechanical structure for support. The 7STA10 series body is made of high-strength alloy material, processed through multiple natural and artificial aging treatments, completely eliminating internal stress in the material, and long-term use will not cause structural deformation. The guide rails and base adopt an integrated precision grinding process, with parallelism and flatness reaching micrometer level, avoiding accuracy loss caused by assembly errors from the installation source.
The center load can reach 20kg, capable of stably carrying large-sized optical lenses, high-precision spectrometer probes, and micro-nano processing fixtures, and during full-load operation, the platform jump is still less than 0.5μm. It can independently complete ultra-precision displacement tasks on a single axis, or freely combine multiple axes to build a multi-dimensional ultra-precision displacement platform, suitable for complex micro-nano processing and high-precision detection scenarios. The motor and lead screw are connected through an imported high-rigidity elastic coupling, the transmission is completely synchronized, the running noise is lower than 42dB, not interfering with the darkroom environment of ultra-precision optical experiments, and can perfectly adapt to the dust-free workshop scenarios with strict vibration requirements.
Full-dimensional optimization of details, zero threshold integration for high-end scenarios
Many engineers in the ultra-precision field have had such an experience: after receiving a high-end translation stage, it takes a lot of time to debug interfaces and compensate for installation errors, and after several weeks of折腾， it still cannot reach the expected accuracy. The 7STA10 series was designed from the very beginning to balance high precision and ease of use. It comes with a high-performance two-phase stepper motor as standard, and can be upgraded to a servo motor as needed. It is equipped with a standard high-speed communication interface, which can seamlessly integrate with Sifan's self-developed high-end multi-axis motion controller. It supports complex motion modes such as multi-axis synchronous linkage, precise point positioning, and uniform scanning. Without complex secondary development, it can quickly integrate into existing experiments and high-end production lines.
Both ends are equipped with high-precision photoelectric zero position and limit switches, supporting one-click rapid and precise zero return. At the same time, it comes with multiple levels of over-travel protection, balancing positioning efficiency and equipment safety. Even novice operators will not worry about damaging high-value components due to collision. The tabletop and base are evenly distributed with international standard hole spacing installation holes, which can be directly fixed on high-precision optical platforms, or flexibly combined with other displacement tables, rotating tables, and lifting tables to quickly build multi-dimensional ultra-precise adjustment frames, suitable for complex optical paths and high-end equipment integration requirements.
The 7STA10 series with a full travel range of 50mm to 300mm covers almost all scenarios with extremely strict requirements for positioning accuracy. As a benchmark series of domestic ultra-precision displacement tables, its core components are all self-developed, with performance comparable to international top-level products. The overall cost performance has been improved by 50%, and it is also equipped with 2-hour rapid response dedicated technical support and 3-year core component warranty, significantly reducing the long-term usage cost for users.
The grinding lead screw builds the foundation, and micrometer-level precision follows. The 7STA10 series of electric translational platforms from Sifan Optics, with the core strength of ultra-precision transmission, breaks the import dependence on ultra-precision displacement, builds a reliable displacement support for cutting-edge scientific research breakthroughs and high-end industrial manufacturing, helps users break through technical boundaries, and truly achieve ultra-precision displacement freedom.
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