Скачать или смотреть New Hexapod Motion & Positioning System: High-Accuracy, Dynamics, 24/7 High-Throughput Applications

More on the High-Bandwidth Hexapod 👉 https://www.pi-usa.us/en/tech-blog/hi...
PI’s lever-driven hexapods with direct power transmission (no screw drives) offer several key advantages over conventional screw-driven parallel-kinematic systems:
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1. Higher Dynamic Performance
• Direct force path: Power is transmitted directly through directly coupled levers and servo actuators rather than through lead screws or ball screws.
• Lower moving mass & inertia: This allows for much higher acceleration, bandwidth, and dynamic response, making these hexapods ideal for high-speed alignment, vibration simulation, and active compensation applications.
• Fast response times: No screw pitch delays or backlash means motion follows control commands more precisely and rapidly.
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2. Superior Precision & Repeatability
• Zero backlash & hysteresis: Direct drive eliminates mechanical play inherent to screw mechanisms.
• Nanometer-scale resolution: Especially when paired with direct-metrology encoders mounted close to the platform, enabling true parallel-kinematic feedback and sub-micron accuracy in 6 DOF.
• Excellent bidirectional repeatability: Critical for optics alignment, micro-assembly, and metrology setups.
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3. Compact Design & Mechanical Efficiency
• No screw drives → shorter actuator length: Motion amplification via levers provides high travel range in a small volume.
• Compact footprint: Perfect for applications with space constraints (e.g., beamline instruments, optical benches, or vacuum chambers).
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4. Maintenance-Free and Long-Life Operation
• Frictionless lever/flexure design: No wear components like screws or sliding elements.
• No lubrication required: Ideal for cleanroom, vacuum, and UHV environments.
• Virtually unlimited lifetime due to absence of mechanical contact wear.
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5. Enhanced Control Characteristics
• Direct actuation simplifies modeling and enables more accurate closed-loop control.
• Predictable kinematics: No nonlinearities from screw friction or backlash compensation needed.
• Smooth motion profiles: Ideal for scanning, active stabilization, and optical path correction.
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Typical Application Examples
• Active optical alignment (e.g., fiber arrays, photonics components)
• Precision optics or mirror alignment
• 6D Nanomanipulation
• High-speed sensor or sample positioning