Now that stepper motors are more and more widely used, then I will give you a specific application scenario.

1. Floppy disk drive

Floppy disk storage is a very simple and convenient computer external information storage device. When the floppy disk is inserted into the drive, the servo motor drives the main shaft to rotate, causing the disk to rotate in the disk sleeve. The magnetic head is installed on the magnetic head carriage, and the stepping motor drives the magnetic head carriage through the transmission mechanism. The step angle is transformed into the displacement of the magnetic head. Thereby reading and writing disk data. Each step of the stepping motor moves further, and the head moves one track.

2. Needle printer driver

Dot-type printer uses the principle of mechanical and circuit drive to make the printing needle hit the ribbon and printing medium, and then print out a dot matrix, and then the dot matrix is ​​composed of characters or graphics to complete the printing task. From the structural point of view, the stylus printer is composed of two parts: a printing mechanism and a drive control circuit. There are three mechanical movements in the printing process: the horizontal movement of the print head, the vertical movement of the printing paper and the firing movement of the printing needle. These movements are executed by the software-controlled drive system through some precision machinery. The print head drive mechanism (also known as the carriage mechanism) uses a stepping motor and a gear reduction device to drive the carriage lateral movement by a synchronous toothed belt. , The stepping speed is determined by the number of driving pulses within a unit time-changing the stepping speed can change the print kerning.

3. Computerized embroidery machine driver

Computerized embroidery machine is developed on the basis of computerized sewing machine. The sewing machine field, which has been dominated by mechanical technology for many years, has entered the era of microcomputer-controlled mechatronics since the introduction of electronic technology in the 1970s. The computerized sewing machine uses a microprocessor to perform four-axis numerical control. The numerical control system controls the two stepping motors in the x-y direction to drive the worktable to move in a plane, and at the same time monitors the rotation of the spindle motor that drives the embroidery needle to move up and down, so as to control the intermittent movement of the xy worktable and the embroidery needle . On this basis, the computer sewing machine has also added functional modules such as broken thread detection, data storage, etc. to make its work stable and convenient.

4. Computer plotter

Stepping motors can accurately convert pulses into angular displacement or linear displacement. It is a typical discrete actuator. It can easily form an open-loop or closed-loop control system. It can be used with a computer for digital control and is widely used in various equipment. Or the device realizes speed, rotation angle or position and motion trajectory control.

5. Mechanical processing equipment

Stepping motors are also widely used as actuators in machining equipment to drive mechanical moving parts. When open-loop control is adopted, the system structure is simple and has certain motion control accuracy. In CNC machine tools, in order to achieve higher motion or positioning accuracy for the drive of the workbench or tool post, sensors that can accurately measure the position and displacement of the workbench or tool post (such as code disc encoders, gratings or magnetic sensors) can be used. , Induction synchronizer, etc.) for position feedback, and speed sensor feedback can also be used to control the motor speed.