Application of Smart Screwdrivers on Linear Motors
2019-01-23
Speaking of motors, those in the industrial control industry are surely no strangers to them. As the most fundamental type of drive equipment, motors are an indispensable component for powering all kinds of machinery. In addition to the servo motors and stepper motors we often hear about, in recent years, thanks to industry advancements, linear motors—featuring even more powerful functionalities—are gradually making their way into the market.
Today, we’re going to talk about voice coil motors, which are a type of linear motor. Broadly speaking, they can be categorized into cylindrical voice coil motors, oscillating voice coil motors, flat voice coil motors, and rectangular voice coil motors. Like other linear motors, the voice coil motor is a device that directly converts electrical energy into mechanical energy, enabling linear motion as well as limited angular oscillation. It operates by leveraging the interaction between magnetic poles generated by the magnetic field from permanent magnets and the magnetic field produced by current-carrying coil conductors, thereby producing regular, controlled motion.
Voice coil motors are primarily used in applications involving small strokes, high speeds, and high accelerations, making them ideal for compact spaces. The most common example is the autofocus function in smartphone cameras, which is entirely handled by the motor drive unit itself. As a result, when installing or assembling such motors, the screws used are invariably exceptionally small.
At this point, manually driving screws is no longer practical—even a handheld smart screwdriver equipped with a hollow-cup motor proves ineffective. The screws are simply too tiny; when tightening them, it’s virtually impossible for the naked eye to clearly identify the exact position of the screw holes. Moreover, precisely aligning the screw with the hole and driving it in is an extremely complicated task. Even if the screw is successfully inserted, determining whether the tightness meets the required standards still demands painstaking, step-by-step inspection—resulting in significant cost burdens for manufacturers.
The intelligent screwdriver equipped with a servo system can be used in conjunction with robots. After setting specific parameters, the servo-powered intelligent screwdriver will tighten each screw at the designated torque and angle for every workstation. Moreover, it stores the torque and angle values recorded during each screw-fastening operation, allowing easy comparison with the preset values to identify any instances where tightening errors have occurred. Of course, if the operator fails to meet the required standards on-site, the intelligent screwdriver will sound an alarm, prompting the staff to re-adjust the workstation settings—thus significantly reducing the tedious step of manual inspection. Therefore, we can conclude that the servo-powered intelligent screwdriver is ideally suited for tightening and assembling small or ultra-small components. This is made possible by the precise drive and accurate feedback provided by the servo motor; for instance, an intelligent screwdriver powered by a high-torque hollow-cup motor would not be appropriate for such applications.
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Relevant Information
Introduction to Smart Electric Screwdrivers
2023-08-19
How to use a smart electric screwdriver
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