In scenarios such as automated optical inspection, low-light coupling, microscopic scanning, and precise component alignment, it is necessary to achieve micro-meter-level positioning accuracy while also meeting the load-bearing requirements of heavy samples and tooling fixtures. Ordinary compact platforms often lack rigidity and are prone to deformation and deviation under heavy loads. The Sefan Optoelectronics 7SWA04 series electric dual-axis translational stage (representative model 7SWA0450) adopts an ultra-thin integrated and screw center drive structure, different from the side-drive layout of 7SWA03. The force distribution is more balanced, making it the preferred model for high-load and high-precision two-dimensional automatic positioning.

The entire machine is an integrated dual-axis base, with strict orthogonal calibration completed at the factory to avoid cumulative errors caused by stacking multiple single-axis units. The guide rails use precise cross-roller combinations combined with finely ground V-shaped guide rails, with a pre-tightening structure to eliminate gaps, ensuring smooth movement and excellent linear accuracy; the transmission core is a finely ground screw pair, connected to 42 stepper motors through a high-quality elastic coupling, with good transmission synchronization and low operating noise, and it is unlikely to experience drift or offset during long-term reciprocating scanning.

The standard travel of 7SWA0450 is 50mm×50mm, with a screw pitch of 0.75mm. In 8 subdivision modes, the resolution can reach 0.00046875mm, the repeat positioning accuracy is better than 0.003mm, the straightness and parallelism are controlled within 0.02mm, the maximum moving speed is 10mm/s, and the rated load is up to 30kg. It has a significant advantage in load-bearing among electric XY stages in the same category. The center drive layout places the load center near the transmission axis, resulting in uniform force distribution, less deformation under heavy loads, and stable positioning consistency during long-term continuous testing.

The model continues the dual-use design of electronic control and manual adjustment, comes with a calibrated handwheel, and can complete sample initial positioning and optical path pre-alignment without power-on, making the debugging flexible and efficient. The ends of the platform are integrated with origin sensors and hardware limit switches, ensuring reliable zero return, automatic protection against over-limit conditions, and avoiding damage to the mechanism due to incorrect operation. The electrical interface is standard DB9, which can be directly paired with the 7SC series motion controller, supporting point positioning, continuous scanning, multi-axis linkage, and compatibility with upper computer programming development, and is suitable for laboratory automation acquisition and production line batch detection integration.

The tabletop is reserved with standard M6 installation holes, and the base is standardized with fixed through holes and threaded holes, which can be directly locked onto the optical platform or inside the equipment frame, ensuring strong installation adaptability. Together with the 7SWA01 large light-transmitting model and the 7SWA03 ultra-thin side-drive model, they form a clear： 7SWA01 focuses on central light-transmitting paths for transmission optical paths； 7SWA03 focuses on extreme space-saving， light-load precise scanning； 7SWA04 focuses on center drive， high-load stable positioning， without the need for intermediate light-transmitting paths， but for scenarios with high load requirements， it is preferred to choose.

It is widely used in laser device automated coupling， micro-area spectral scanning， microscopic imaging stitching， photodetector calibration， MEMS device testing， and small-scale precise tooling automatic alignment， etc. Whether it is for setting up an automated optical path in a research laboratory or developing a high-load optical detection system by equipment manufacturers， the 7SWA04 series electric dual-axis translational stage， with balanced force distribution， solid rigidity， and micro-meter-level repeat positioning， provides a stable and reliable solution for heavy-load two-dimensional precise motion.