NEWS: Rotero has a new supplier
NEWS: Rotero has a new supplier
Actuators Voice coilsAre you looking for a linear motion solution that is both powerful and highly precise? Rotero’s voice coils have been developed to deliver maximum performance in applications where speed, repeatability and precision are crucial. Thanks to the compact design and direct drive without a mechanical transmission, these actuators offer an efficient and reliable solution for numerous industries, including medical technology, industrial automation, and optical systems.
A voice coil is an electromagnetic actuator that generates direct linear motion. The technology is based on the interaction between a coil and a magnet, resulting in precise and smooth movement. Originally developed for loudspeakers, this technique has now proven itself in many advanced applications where speed and precision are essential.
Passing an electrical current through the coil creates a magnetic field that generates a linear force. This ensures direct and controlled movement without the need for gears or other mechanical components. The result is quiet, efficient and precise operation with minimal wear and a long lifespan.
Voice coils are available in various designs, tailored to specific applications and performance requirements.
Axial voice coils provide linear motion along a single axis and are often used in precision equipment. Radial voice coils move within a circular magnetic field and are used in applications where controlled rotational movement is required. Dual voice coils combine two coils to generate greater power and accuracy, making them suitable for high-performance applications such as optical systems and advanced measurement techniques.
Thanks to the compact size, these actuators fit into applications with limited space. The direct drive without a mechanical transmission ensures minimal wear and a longer lifespan. High speed and repeatability make them indispensable in sectors where every millisecond counts.
Their smooth and quiet operation makes them particularly suitable for precision applications where vibration or mechanical noise are undesirable. Moreover, they offer an exceptionally short response time, enabling fast and accurate positioning.
Technically speaking, these voice coils deliver impressive performance. The linear force range varies from 0.1 N to a peak of 185 N, making them suitable for both light-duty and heavy-duty applications. The maximum stroke length is 25 mm and the response frequency can reach up to 200 Hz, ideal for fast and dynamic processes. The repeatability margin is less than 1 micrometre, guaranteeing extremely high precision. Despite the compact dimensions, with a weight starting at just 10 grams, these actuators have a service life of more than 10 million cycles, guaranteeing long-term reliability.
Voice coil applications
Voice coils are widely used in various industries where precision and reliability are key.
In medical technology, they contribute to the precise control of surgical robots, injection systems and advanced diagnostic equipment. In industrial automation, these actuators are used in pick-and-place machines, positioning systems and metering equipment.
In optical technology, voice coils provide highly precise lens and mirror positioning in high tech cameras, microscopes and laser equipment. The aerospace sector benefits from their lightweight and robust design, ideal for stabilisation and positioning systems. Also, in test and measurement equipment, they deliver high repeatability, essential for accurate measurements and calibration processes.
The combination of precision, reliability, and customisation makes these actuators an excellent choice for demanding applications. Their ability to generate movements with a precision of less than one micrometre makes them perfect for high tech applications.
Thanks to the simple yet thoughtful design, they are resistant to wear and require little maintenance, resulting in a longer service life and lower operational costs. Direct electromagnetic operation results in fast response times, ideal for applications where both speed and precision are required.
Customisation is possible for specific applications. Our technical experts develop a voice coil solution that seamlessly matches the specified requirements. Whatever the requirement – medical innovations, for example, or industrial automation or advanced optical systems – Rotero’s voice coils offer the perfect combination of power and precision.
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