Precision positioning mechanisms comprise multiple key components. The demands for positioning accuracy are diverse, involving various functionalities and levels of precision, making the choice of the right combination of components especially critical. The selection is based not merely on the quality of the components but on their ability to meet specific functional and precision requirements.
Additionally, control drive devices play a crucial role in enhancing the accuracy of positioning systems. Enhancing system accuracy requires not only improving the performance of individual components but also optimizing and designing the entire system comprehensively.
Among transmission mechanisms, lead screws are one of the most commonly used components. Their precision range is extensive, from economical screws to high-precision ball screws and hydrostatic screws.
In applications requiring precise positioning, direct-drive or friction-drive devices such as piezoelectric elements and linear motors offer practical examples. Despite the variety of transmission mechanism components available on the market, selection must consider a balance of cost, long-term stability, travel distance, rigidity, load capacity, and speed, as well as the difficulty of control and ease of use. Among these factors, ball screws are widely used due to their multiple characteristics.
Guidance mechanisms also rely on various components, with dynamic guides being the most common form. However, with the current demands for high precision and speed, the use of hydrostatic and rolling guides is increasing because they can reduce issues like backlash, changes in friction, stick-slip behavior at low speeds, and durability at high speeds. Additionally, in specific environments, such as under vacuum conditions, the application of magnetic levitation guides is becoming increasingly practical.
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