Article | October 1, 2024

Multi-Axis Positioning Stages: What Is The Difference Between Parallel And Stacked Positioning Systems?

When selecting a multi-axis positioning system, users often opt for stacked motorized stages, which work well for simpler applications. However, as complexity increases, issues such as cable management, dynamic performance, and stiffness arise. Traditional stacks of single-axis stages can lead to inconsistent dynamics, with the bottom stage bearing the entire load, complicating tuning and responsiveness.

In contrast, parallel kinematic systems, like hexapods, provide superior performance for 4, 5, and 6-axis applications. These systems enhance stiffness and precision while eliminating the need for cumbersome tuning processes. With a compact design, they minimize issues like cabling interference and parasitic motion errors, which can plague stacked configurations.

Moreover, modern hexapod controllers simplify operation through user-friendly software that manages coordinate transformations and motion simulation. They also integrate features like collision avoidance and real-time data monitoring, ensuring efficient operation.

PI’s hexapods, featuring advanced actuator technologies, represent a significant evolution in motion control, offering flexible, high-performance solutions that can often be more cost-effective than traditional stacked systems. This approach enables manufacturers to achieve tighter tolerances and improved overall efficiency in complex applications across various industries.

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