57HS250 Series 2 Phase Hybrid Stepper Motors

1. Product Overview

Step motor is a motor that converts the electrical pulse signal into the corresponding angle displacement or the line displacement. It can use the quantity and frequency of the pulse to control the rotation (rotation angle, rotation speed) in automation applications. For each of the pulse, the motor rotor rotates a angle or forward, and its output angle shift or line displacement is proportional to the input pulse, and the speed is proportional to the pulse frequency. Therefore, step motor is also called pulse motor.

In the case of non-overload, the speed of the motor and the stop position depends only on the frequency and number of the pulsed input, without being affected by the load change. That is to say, add a pulse signal to the motor, and the motor turns a step distance. The advantage of this linear relationship between pulse and angle rotation, plus that a step motor only has periodic errors without cumulative errors, make step motor widely used in automation speed, position and other control fields easily.

With the development of product research and development of technology, the performance of the step system has been even more improved. If the stepper system is not overloaded, there will be no step loss mostly nowadays, and life time very long, almost no need maintenance, which makes steppers popular and widely used in many kinds of industrial automation motion control applications.

Currently, stepper motors are widely used in the field of motion control. Below is a brief introduction to several issues that need to be noted when use hybrid stepper motors.

The torque of the stepper motor will decrease as the speed increases.

When the stepper motor rotates, the inductance of each phase winding of the motor will form a reverse electromotive force. The higher the speed, the greater the reverse electromotive force. In this case, the phase current of the motor decreases with the increase of frequency (or speed), resulting in a decrease in torque.

The stepper motor can work well at low speeds, but if it exceeds a certain speed, it may not start or there may be strong noise whistling.

The stepper motor has a technical parameter: no-load starting frequency, which is the pulse frequency at which the stepper motor can start normally under no-load conditions. If the pulse frequency is higher than this value, the motor cannot start normally and may experience step loss or rotor blockage. With load, the starting frequency should be lower. If the motor is to achieve high-speed rotation, there should be an acceleration process in the pulse frequency, that is to say the starting frequency should be lower, and then a certain acceleration should be applied to reach the desired high frequency (the motor speed should increase from low speed to high speed).

How to overcome the vibration and noise of two-phase hybrid stepper motors during low-speed operation?

The inherent drawbacks of stepper motors are high vibration and noise during low-speed rotation, which can generally be overcome by the following solutions:

A. If the stepper motor works exactly in the resonance zone, mechanical transmission such as changing the reduction ratio can avoid the resonance zone;

B. The most commonly used and convenient method is to use drivers with subdivision functions;

C. Replace with a stepper motor with a smaller step angle, such as a three-phase or five phase stepper motor.

The Applications of Kaifull PRMCAS Hybrid Stepper Motors

The stepper motor is mainly used in the field of CNC machine tool manufacturing. The reason why it is mainly used in this field is that the motor does not require A/D conversion and can directly convert digital pulse signals into angular displacement, which is exactly what CNC machine tool equipment needs and cannot be achieved by many other types of motors. Therefore, the stepper motor can be said to be the most ideal executive component of CNC machines, and it will naturally be widely used in the manufacturing field of CNC machines.

Stepper motors can also be used in many other machinery, such as motors in automatic feeding machines and general-purpose floppy disk drives. In addition, it can also be applied in printers and plotters.

Stepper motors have the characteristics of fast start stop and positioning, and are often used as actuators for position control in the field of digital control. In the fast operation of a stepper motor, it is required that the driving circuit provide the driving current to the stepper motor winding as close as possible to the technical specifications required to generate sufficient torque. The maximum allowable temperature on the surface of the stepper motor. Stepper motors are used in conjunction with drivers, and many drivers support subdivision function, which achieves very small step angles and more precise control. The torque of the stepper motor will decrease as the speed increases. The accuracy of a general stepper motor is 3-5% of the stepper angle and does not accumulate. The stepper motor can operate normally at low speeds, but cannot start above a certain speed, accompanied by a whistling sound.

Widely used in ATM machines, inkjet printers, engraving machines, photo machines, spraying equipment, medical instruments and equipment, computer peripherals and massive storage devices, precision instruments, industrial control systems, office automation, robots and other fields, especially suitable for applications that require smooth operation, low noise, fast response, long service life, and high output torque.

Machine tool industry

Stepper motors are widely used in the machine tool industry, mainly for controlling the feed and positioning of machine tools. In CNC machine tools, stepper motors can accurately control the machining position and speed of workpieces, thereby achieving high-precision machining. In addition, stepper motors can also be used to control the automatic feeding and tool changing functions of machine tools.

Automation equipment

Stepper motors are also widely used in automation equipment, such as automated production lines, automated packaging machines, automated handling robots, etc. Stepper motors can accurately control the movement and position of equipment, thereby achieving efficient automated production.

Electronic devices

Stepper motors also have certain applications in electronic devices, such as in various stages of electronic product production, such as solder paste printing, SMT placement, reflow soldering, visual inspection, production of cables with terminals, dispensing machines, screen laminating machines, etc. They can also be used in many devices, such as ATMs, vending machines, 3D printers, scanners, printers, etc.

Medical equipment

Stepper motors are also applied in medical equipment, such as medical robots, surgical instruments, etc. Stepping motors can accurately control the movement and position of robots and surgical instruments, thereby achieving high-precision surgery and treatment.

The automotive industry

Stepping motors are also applied in the automotive industry, such as seat adjusters, air conditioning door controllers, and so on. The stepper motor can precisely control the position and movement of car seats and air conditioning doors, thereby improving the comfort and safety of the car.

In the field of robotics

Stepping motors are also widely used in the field of robotics, such as industrial robots, service robots, etc. Stepping motors can accurately control the motion and position of robots, thereby achieving efficient production and service.

In summary, stepper motors have a wide range of applications in many fields, and their high accuracy, fast response speed, and convenient control make them the core components of many automation equipment. With the continuous progress of technology, the application fields of stepper motors will continue to expand and deepen.

2. Hybrid Stepper Motor General Technical Specifications

3. Hybrid Stepper motor Performance Datasheet

4. Mechanical Dimensions (in mm)

5. Wiring Diagram

6. Torque Speed Curves