Month: August 2024

1.Definition of integrated servo motor
Integrated servo motor‌ is a motor that integrates servo motor and driver. It has the characteristics of compact structure, easy installation and fast response speed. The integrated servo motor has a servo driver integrated inside it, which can directly receive signals from the controller and perform corresponding actions. Compared with traditional split servo motors, this design reduces the number of external connecting parts, further simplifying the installation and maintenance process of the system. In addition, due to the integrated design, the integrated servo motor also has significant advantages in performance, such as higher accuracy and faster response speed, thereby improving the overall performance and reliability of the system.

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2.Components of integrated servo motor
1.Motor part‌: including rotor, stator, windings, magnetic poles and other components. There are various types of motors, such as DC servo motors, AC servo motors, stepper servo motors, etc. Each type of motor is different in structure and control method.
2.Sensor part: usually includes position sensor, speed sensor, torque sensor, etc., which are used to detect the position, speed, torque and other parameters of the motor in real time, and feed the detection results back to the control system for real-time adjustment.
3.Controller part‌: Usually composed of a control chip, amplifier, encoder, etc., used to receive parameters fed back by sensors and output control signals to the motor to control and adjust the position, speed, torque and other parameters of the motor. .
4.Power supply part‌: Usually composed of power transformer, rectifier, filter, etc., used to provide stable power supply voltage and current to ensure the normal operation of the motor.
5.Mechanical part‌: Usually composed of reducers, couplings, transmission devices, etc., used to convert the rotational motion output by the motor into linear motion or other specific motion forms to meet different application requirements.

3.Operation mode of integrated servo motor
1.Position mode‌: This is the most commonly used control mode for servo motors. The host computer sends high-speed pulses of a certain frequency and cooperates with the direction signal to realize the forward and reverse rotation of the motor. By adjusting the frequency of the pulses, the speed of the servo motor can be changed. The core of the position mode is the position closed-loop control system, which consists of position sensors, controllers, drives and motors. It uses PID control algorithm to achieve precise control of the motor position by adjusting the proportional coefficient, integral coefficient and differential coefficient. Position mode is widely used in situations that require precise positioning, such as CNC machine tools, robot joints, automated assembly lines, etc.
2.Speed ​​mode‌: Speed ​​mode uses analog quantities to control the rotation speed of the motor. Although speed mode has fewer applications because it can control speed with the same accuracy as position mode, it still has its uses in certain specific applications. The core of speed mode is the speed closed-loop control system, which consists of speed sensor, controller, driver and motor. It also uses PID control algorithm to eliminate speed deviation and make the motor shaft run at a constant or changing speed.
3.Torque mode‌: Torque mode is usually used in constant voltage control to control the output torque of the servo motor through analog quantities. This mode is combined with the position mode for closed-loop control, and the effect is more ideal. The control of torque mode is more complicated, and it is necessary to detect the output current of the servo drive and perform torque control based on the current feedback signal.

4.Application scope of integrated servo motor
‌1.Industrial automation‌: Integrated servo motors play a vital role in the field of industrial automation and are widely used in robotic arms, conveyors, assembly lines and other equipment. They realize efficient production processes and improve production efficiency and product quality through precise position control and motion control. The fast response and precise position feedback capabilities of servo motors enable it to adapt to complex industrial environments and task requirements‌.
2.Robot technology‌: Servo motors are an ideal choice for robot joint drive. They can provide high-performance power output and flexible motion control to meet the different needs of robots in various industries, services and special environments. In fields such as automated production lines and logistics warehousing, servo motor-driven robots can achieve efficient operations and automation tasks‌.
3.CNC machine tools‌: Integrated servo motors are widely used in CNC machine tools, which can achieve precise motion control and position control, provide high-speed, high-precision working performance, and meet the needs of modern manufacturing for equipment automation and intelligence.
4.Medical equipment‌: Servo motors are widely used in various medical equipment, such as medical robots, imaging equipment, surgical instruments, etc. The high precision and reliability of servo motors play a vital role in medical equipment, ensuring the stability and safety of medical equipment‌.
5.Aerospace‌: In the field of aerospace, servo motors are widely used in the steering gear system of aircraft to achieve attitude control and flight stability of the aircraft by controlling the rudder surface of the aircraft. The rapid response capability and precise control capability of the servo motor enable the aircraft to achieve various complex flight movements, ensuring flight safety and stability‌2.

In addition, integrated servo motors are also used in medical equipment, 3D printing, textiles, printing and other industries. With the continuous development of technology, its application scenarios will continue to expand, providing more efficient and accurate solutions for various industries‌.

Source:https://www.steppernews.com/2024/08/operation-mode-of-integrated-servo-motor.html

1.Definition of five-phase stepper motors
A five-phase stepper motor is a motor powered by a five-phase AC power supply. Its structure is more complex than that of a four-phase stepper motor, and it can provide higher control accuracy and finer step lengths. This type of motor is usually used in application scenarios that require high-precision control, such as precision CNC machine tools, high-precision robots and other equipment. The working principle of a five-phase stepper motor is to control the power-on sequence of the five windings and the magnitude of the current to make the rotor produce different rotation angles, thereby achieving precise position control. Due to the high precision of the five-phase stepper motor, it has been widely used in high-precision automation equipment.

2.How to control the direction of the five-phase stepper motor
1.Change the direction of the current
The direction of the five-phase stepper motor can be achieved by changing the direction of the current. Usually, a five-phase stepper motor has two sets of coils, each with two pins, marked as A+, A- and B+, B-. If you want the motor to rotate clockwise, the current should enter the coil from A+ and B- and exit the coil from A- and B+; if you want the motor to rotate counterclockwise, the current should enter the coil from A- and B+ and exit the coil from A+ and B-.
2.Change the step sequence
Stepper motor control is actually controlling the step sequence of the motor. The step sequence of a five-phase stepper motor is AB-BC-CD-DE-EA. If you need to change the direction of the motor to the opposite direction, you need to change the step sequence. The method is to reverse the flow of current, that is, first energize the E and D coils, then energize the A and E coils, and so on.
3.Use a direction controller
If you don’t want to change the connection method or step sequence in the circuit, you can also use a direction controller to change the direction of the five-phase stepper motor. The direction controller can add a reversing switch at the input or output of the motor control signal. When you need to change the direction, just switch the switch.

3.Advantages of five-phase stepper motors
1.Smooth motion and high resolution: The five-phase stepper motor makes the rotation of the stepper motor smoother by introducing more phases, reduces vibration and noise, and improves the stability of the mechanical system. It can achieve a smaller step angle and improve the resolution of the stepper motor through microstepping, which is very useful for applications that require precise positioning and control.
2.Low speed and high torque: The five-phase stepper motor can provide higher output torque at low speed, which is very beneficial for some applications that require low speed and high torque output, such as medical equipment and precision instruments.
3.Reduce resonance and high-speed performance: At certain frequencies, stepper motors may resonate, resulting in unstable motion. Five-phase stepper motors can effectively reduce resonance and improve the smoothness of the system’s motion. At the same time, it can better control the motor at high speed and reduce the possibility of losing steps, which is very important for applications that require high-speed motion, such as printing presses and CNC machine tools. ‌
4.High efficiency: By better controlling the phase of the motor, the five-phase stepper motor can achieve the same output power at a lower current, thereby improving the energy efficiency of the system. ‌
5.Strong adaptability: The five-phase stepper motor driver is suitable for various stepper motors, including different types of motors such as bipolar, quadrupole and octapole, and has a wide range of applicability. ‌

4.Application fields of five-phase stepper motors
1.Automation equipment and instruments: The five-phase hybrid stepper motor is suitable for various small automation equipment and instruments, such as pneumatic marking machines, labeling machines, cutting machines, laser marking machines, plotters, engraving machines, CNC machine tools and pick-and-place devices. In these applications, the five-phase stepper motor can provide low vibration, low noise, high precision and high speed performance to meet user needs. ‌2.Precision CNC machine tools and high-precision robots: Due to its high-precision characteristics, the five-phase stepper motor is widely used in high-precision automation equipment such as precision CNC machine tools and high-precision robots. These devices have high requirements for precision and performance. Five-phase stepper motors can provide finer steps and higher control accuracy to ensure accurate operation of the equipment.
3.Industrial automation, machine tools, printing presses: Five-phase stepper drives are mainly used in industrial automation, machine tools, printing presses and other fields, with precise angle and speed control as the main features. These application areas require stepper motors to provide stable and reliable operation and precise position control.
4.Textile machinery and equipment: Stepper motors are widely used in textile machinery and equipment, such as computer embroidery machines. In particular, five-phase hybrid stepper motors use high-phase stepper motors to reduce step angles and improve control accuracy. They are suitable for applications with smooth operation, low noise, fast response and long service life.

5.Conclusion
As a special stepper motor, the five-phase stepper motor has the advantages of high precision, high efficiency and low noise. Its working principle, circuit structure and control method are different from those of traditional stepper motors, but its application range is wider. In the future, with the continuous advancement of science and technology and people’s increasing demand for high-precision intelligent equipment, five-phase stepper motors are expected to be used in more fields.

Source:https://www.steppernews.com/2024/08/application-fields-and-advantages-of.html

1.Definition
A variable reluctance stepper motor is a motor whose rotor is made of ferromagnetic material. When the stator is energized, it becomes an electromagnet and the rotor feels a pull in the specified direction. Ferromagnetic materials always try to adjust themselves in the path of minimum magnetic resistance. By energizing the coil, a magnetic field is generated and the air gap magnetic resistance is changed. This type of motor is called a variable reluctance stepper motor. In this type of motor, the direction of the motor is independent of the direction of the current in the winding. The rotor of a variable reluctance stepper motor (VR stepper motor) is made of soft magnetic material and has no permanent magnets. The stator coil generates a magnetic field that attracts the rotor teeth and causes the rotor to move step by step.

2.Common types of faults
1.Abnormal operation: This may be caused by improper driver parameter settings, poor connection between the motor and the driver, or motor failure. To solve this problem, you need to check whether the driver parameter settings are correct, whether the connection between the motor and the driver is good, and whether the motor is faulty.
2.Loss of step: This means that the actual position of the motor is inconsistent with the command position during operation. The reason for the loss of step may be due to excessive motor load, insufficient drive current, improper setting of the drive subdivision number, etc. The solution to this problem is to reduce the motor load, increase the drive current, adjust the drive subdivision number, etc.
3.Excessive noise: It may be caused by motor bearing wear, bad gears, poor connection between the motor and the drive, etc. In order to reduce noise, it is necessary to check the condition of the motor bearings and gears to ensure that they are in good working condition, and check whether the connection between the motor and the drive is good.
4.Heat: It may be caused by excessive motor load, excessive drive current, poor motor heat dissipation, etc. In order to avoid overheating of the motor, it is necessary to reduce the motor load, adjust the drive current, strengthen the heat dissipation of the motor, etc.

3.Maintenance and maintenance methods
1.Cleaning: Clean the stepper motor regularly to remove dust and dirt and keep the motor clean. Use vinegar or gasoline to wipe the inside and outside of the motor, and pay special attention to protect the motor from physical damage
2.Lubrication: Lubricate the bearings and other moving parts of the stepper motor regularly to reduce friction and wear. ‌ Use special lubricating oil or grease, and ensure that the bearings are fully lubricated. ‌
3.Parts replacement: Regularly check the parts of the stepper motor, such as the synchronous belt, gears and controller, and replace them in time if they are damaged or aged. ‌ It is recommended to use original accessories to avoid incompatibility issues that may be caused by using non-original parts. ‌
4.Storage conditions: If the stepper motor is not used for a long time, it should be stored in a dry, dust-free environment to prevent moisture and dust from damaging the motor. ‌ During storage, it is recommended to turn the motor regularly to ensure its flexibility. ‌
5.Regular operation: Even if it is not used frequently, the stepper motor should be run for a period of time regularly to maintain its performance and flexibility. ‌ This helps prevent the motor from degrading due to long-term non-use. ‌
6.Avoid overload: Make sure the load of the stepper motor is within the recommended range and avoid long-term overload operation to prevent overheating and damage to the motor. ‌
7.Professional operation: It is not recommended to repair or adjust the stepper motor by yourself unless you are an experienced technician. You should seek the help of professionals to ensure proper maintenance and extend the service life.

4.How to choose the right model

1.Torque selection: Choose the right motor model according to the required torque size (i.e. the torque size of the object to be driven). ‌ Generally speaking, if the torque is below 0.8N.m, you can choose 20, 28, 35, 39, 42 (the diameter or squareness of the motor body, unit: mm); if the torque is around 1N.m, it is more appropriate to choose a 57 motor; if the torque is several N.m or more, you should choose a stepper motor with specifications such as 86, 110, 130, etc. ‌2.Speed ​​selection: The output torque of the motor is inversely proportional to the speed. At low speed, the output torque of the motor is large; while at high speed, the torque will decrease. ‌ Choose the right motor according to the needs of the working environment. If a high-speed motor is required, a motor with a slightly smaller inductance should be selected to obtain a larger output torque.
3.No-load starting frequency selection: The no-load starting frequency of the stepper motor is an important indicator, especially in applications that require instantaneous frequent starting and stopping. If you need to start directly to achieve high-speed operation, you should choose a motor with a higher no-load starting frequency, such as a reactive or permanent magnet motor.
4.Phase number selection: Motors with different phase numbers have different working effects. The more phases, the smaller the step angle can be made, and the vibration during operation is relatively smaller. In most occasions, two-phase motors are used more. However, in high-speed and high-torque working environments, three-phase stepper motors are more practical.
5.Use environment: Select according to the use environment of the motor. For example, special stepper motors that are waterproof and oil-proof are suitable for some special occasions, such as underwater robots, etc.