The voice coil motor, named for its structural resemblance to the voice coil found in a speaker, is a unique type of direct drive motor that converts electrical energy directly into linear motion without requiring any intermediate mechanical transmission. The basic principle involves a cylindrical coil placed within a uniform magnetic field. When current flows through the coil, it generates an electromagnetic force that drives the load in a linear back-and-forth motion. By adjusting the current’s magnitude and polarity, the direction and strength of the force can be controlled. This makes the voice coil motor suitable for both linear and rotational applications. It offers advantages such as high responsiveness, fast speed, high acceleration, a simple structure, compact size, excellent force characteristics, and ease of control.
SMT machines, also known as "mounting machines" or "surface mount systems," are essential components in the electronics manufacturing process. Positioned after the dispenser or screen printer on the production line, these machines use a placement head to accurately position electronic components onto PCB pads. An automatic placement machine is designed for high-speed, high-precision, and fully automated component placement, making it one of the most critical and complex devices in the entire SMT production line. Over time, SMT machines have evolved from early low-speed mechanical models to high-speed optical centering systems, with modern versions becoming more modular, multifunctional, and flexible in integration.
Improving the efficiency of patch actuators has always been a key focus in the field of electronics assembly. Voice coil motors present a promising solution due to their ability to offer higher speeds, broader application possibilities, and superior performance. In the context of the patching process, the voice coil motor performs three main motions: picking up, rotating, and placing. Both the pickup and rotation actions involve moving to a specific target position, and these movements are repetitive in nature. However, the chip placement stage is the most crucial part of the entire process. To ensure reliable placement, this step requires not only precise position control but also careful regulation of the motor's output force—essentially a combination of force and position control.
In terms of control methods for voice coil motors, achieving a soft landing is essential for efficient and safe operation. Advanced control strategies allow for effective soft landing, offering significant advantages in parameter tuning, program development, and motion trajectory monitoring compared to traditional methods. These improvements contribute to better performance and reliability in real-world applications.
For more information about voice coil motors and their applications, we invite you to explore further and follow Tongmao’s latest updates on voice coil motor technology.
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