Speaking of motors, people in the industrial control industry are certainly familiar with them. As the most basic driving device, motors are one of the essential elements that drive all mechanical operations. In addition to the commonly heard servo motors and stepper motors, in recent years, due to industry development, more powerful linear motors have also begun to slowly enter the market.
Today we are talking about voice coil motors, which are a type of linear motor and can be roughly divided into cylindrical voice coil motors, swing voice coil motors, flat voice coil motors, and rectangular voice coil motors. Like other linear motors, voice coil motors are devices that directly convert electrical energy into mechanical energy, achieving linear and limited angular motion. They utilize the interaction between the magnetic field from permanent magnets and the magnetic field generated by the energized coil conductor to produce regular motion.
Voice coil motors are mainly used for small stroke, high speed, and high acceleration movements, making them suitable for confined spaces. The most common application is the autofocus function in mobile camera lenses, which is entirely completed by the entire driver. It is evident that the screws used to install or assemble such motors must be exceptionally small.

At this point, manually screwing in the screws is no longer suitable. Even using a handheld smart screwdriver with a hollow cup motor is of no use, because these screws are so small that it is difficult for the naked eye to clearly identify the position of the screw hole when tightening. Moreover, aligning the screw with the screw hole and inserting it is extremely complex. Finally, even if the screw is successfully inserted, checking whether the tightness meets the requirements needs to be done bit by bit, which can directly impose a significant cost burden on manufacturers.

The smart screwdriver of the servo system can be used in conjunction with robots. After setting certain values, the servo smart screwdriver will tighten each screw at the workstation according to the required torque and angle. It also stores the torque and angle values output during each screw insertion, allowing for comparison with the set values to identify any tightening errors. Of course, if the operation on-site does not meet the requirements, the smart screwdriver will alarm to remind the staff to reset the workstation, thus reducing the tedious inspection process. Therefore, we can see that the servo smart screwdriver is very suitable for tightening assemblies of small or ultra-small objects, thanks to the precise drive and accurate feedback of the servo motor. In contrast, smart screwdrivers with high-torque hollow cup motors are not suitable for such occasions.