Z-Axis Vertical Lift Stage
The SWI-SV series high-precision vertical lift stages achieve long-travel, precise vertical motion at the lowest possible profile height. Four different models offer different travel and load capacities, and each model has multiple configurations, making the SWI-SV series the ideal choice for all high-performance vertical motion applications. Using SP-grade crossed-roller guideways and precision ground ball screws, the series provides excellent geometric performance and outstanding minimum incremental motion, with minimum incremental step and positioning stability better than 30 nm. The high-precision 5-phase stepper motor with a specified preloaded precision ground screw drive, combined with a directly coupled feedback system, completely avoids the position jitter errors caused by the PID closed-loop control of conventional AC/DC servo drives; with its pulse-command-type 5-phase stepper motor, the stage remains almost perfectly stationary after fast positioning. Using a mechanism that directly drives the moving carriage, it achieves long travel while maintaining minimum height; the design that minimizes working point height further reduces Abbe error and helps improve overall system accuracy.
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