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  • Why does the frequency converter damage the motor bearings? Apr 19, 2023
    Damage to the motor caused by the inverter includes two aspects: stator winding damage and bearing damage. This damage usually occurs within a few weeks to ten months. The specific time depends on the inverter brand, motor brand, motor power, and inverter carrier frequency. , the length of the cable between the inverter and the motor, the ambient temperature and other factors. The mechanism of motor bearing damage caused by frequency converter: The reason why the frequency converter damages the motor bearings is that there is current flowing through the bearings, and this current is in a state of intermittent communication. The intermittent communication circuit will generate arcs and burn the bearings. There are two main reasons for current flow in AC motor bearings: one is the induced voltage caused by the imbalance of the internal electromagnetic field; the other is the high-frequency current path caused by stray capacitance. When the currents of the three-phase windings are equal and the phase difference is 120°, the magnetic field inside the ideal AC induction motor is symmetrical? No voltage will be induced on the motor shaft. When the PWM voltage output by the inverter causes the internal magnetic field of the motor to be asymmetrical, A voltage will be induced on the shaft, with an amplitude between 10-30v, related to the driving voltage. The higher the drive voltage, the higher the voltage on the shaft. When this voltage value exceeds the dielectric strength of the lubricating oil in the bearing, a current path will be formed. During the rotation of the shaft, at a certain moment, the insulation of the lubricating oil blocks the current again. This process is similar to the on-off process of a mechanical switch. During the on-off process, an arc will be generated, and the arc will ablate the shaft, ball and The surface of the shaft bowl forms pits. If there is no external vibration, the small pits will not have much impact, but if there is external vibration, grooves will be formed, which will have a great impact on the operation of the motor. In addition, experiments show that the voltage on the shaft is also related to the fundamental frequency of the inverter output voltage. The lower the fundamental frequency, the higher the voltage on the shaft, and the more serious the bearing damage will be. In the early stages of motor operation, when the lubricating oil temperature is low, the current amplitude is 5-200 mA. Such a small current will not cause any damage to the bearings. However, after the motor has been running for a period of time, as the lubricating oil temperature increases, The peak current will reach 5-10A, which will cause arcing and form small pits on the surface of bearing parts. If you want to know more about the problem of motor bearing damage caused by frequency converters, please continue to pay attention to the updated information of our website.!sales@schwahrtechnology.com
  • What are the application fields of PLC? May 26, 2022
    A PLC programmable controller is an electronic device that performs digital operations specifically designed for use in industrial environments. It uses a programmable memory to store instructions for performing operations such as logical operations, sequential operations, timing, counting, and arithmetic operations, and can control various types of equipment through digital or analog inputs and outputs. machinery or production process. PLC and its related peripheral equipment should be designed according to the principle of easy integration with the industrial control system and easy expansion of its functions. At present, PLC programmable controllers have been widely used in various industries such as steel, petroleum, chemical industry, electric power, building materials, machinery manufacturing, automobiles, textiles, transportation, environmental protection, culture and entertainment at home and abroad. The usage can be roughly summarized as follows Several categories. 1. Logic control of switching quantity This is the most basic and extensive application field of PLC. It replaces traditional relay circuits to realize logic control and sequence control. It can be used for the control of single equipment, as well as for multi-machine group control and automated assembly lines. Such as injection molding machines, printing machines, stapling machinery, combination machine tools, grinders, packaging production lines, electroplating lines, etc. 2. Analog control In the industrial production process, there are many continuously changing quantities, such as temperature, pressure, flow, liquid level and speed, etc., which are all analog quantities. In order for the programmable controller to process analog quantities, A/D conversion and D/A conversion between analog quantities (Analog) and digital quantities (Digital) must be implemented. PLC manufacturers all produce matching A/D and D/A conversion modules to enable programmable controllers to be used for analog control. 3. Motion control PLC can be used to control circular motion or linear motion. In terms of control mechanism configuration, in the early days, switching I/O modules were directly used to connect position sensors and actuators. Nowadays, dedicated motion control modules are generally used. Such as single-axis or multi-axis position control modules that can drive stepper motors or servo motors. Almost all the products of major PLC manufacturers in the world have motion control functions and are widely used in various machinery, machine tools, robots, elevators, etc. 4. Process control Process control refers to the closed-loop control of analog quantities such as temperature, pressure, flow, etc. As an industrial control computer, PLC can program various control algorithms to complete closed-loop control. PID adjustment is a commonly used adjustment method in general closed-loop control systems. Large and medium-sized PLCs have PID modules, and many small PLCs also have this functional module. PID processing generally runs a dedicated PID subroutine. Process control is widely used in metallurgy, chemical industry, heat treatment, boiler control and other occasions. 5. Data processing Modern PLC has functions such as mathematical operations (including matrix operations, function operations, and logical operations), data transmission, data conversion, sorting, table lookup, and bit operations, and can complete data collection, analysis, and processing. These data can be compared with the reference values ​​stored in the memory to complete certain control operations. They can also be transmitted to other smart devices using the communication function, or they can be printed and tabulated. Data processing is generally used in large-scale control systems, such as unmanned flexible manufacturing systems; it can also be used in process control systems, such as some large-scale control systems in papermaking, metallurgy, and food industries. 6. Communication and networking PLC communication includes communication between PLCs and communication between PLCs and other intelligent devices. With the development of computer control, factory automation networks have developed rapidly. All PLC manufacturers attach great importance to the communication function of PLC and have launched their own network systems. Newly produced PLCs all have communication interfaces, making communication very convenient. If you want to know more about PLC, please continue to pay attention to the updated information of our website! sales@schwahrtechnology.com  
  • Sensor production process Mar 29, 2021
    What procedures does each qualified sensor go through before being delivered to customers? Raw material preparation: The raw materials for sensor production include sensing components, circuit boards, casings, cables, etc. The sensing element is the core component of the sensor and is usually made of metal, ceramics, semiconductor materials, etc. The circuit board is the control center of the sensor and is usually made of fiberglass, epoxy resin, etc. The casing is used to protect the internal components of the sensor and is usually made of plastic, metal and other materials. Cables are the medium for communication between sensors and other devices, and are usually made of conductive materials such as copper wires. Processing and manufacturing: The manufacturing process of sensors requires multiple processes, including cutting, drilling, milling, turning, etc. These processes need to be completed with the help of machine tools and other tools. After each component is processed, it needs to undergo surface treatment processes such as grinding and polishing. Assembly: Assembling the sensor (Level sensor, Pressure Sensor, Magnetic/Proximity/Photoelectric Switch Sensor) requires precise coordination and combination of various components. Common assembly methods include dispensing, welding, screws, etc. After the assembly is completed, testing is required to ensure that all parameters of the sensor meet the requirements. Testing: The final test of the sensor needs to be carried out in combination with different measurement principles and application scenarios to ensure that its performance meets the requirements. Common testing methods include electrical performance testing, mechanical performance testing, environmental adaptability testing, etc.   Do you want to apply sensorics in any of your Projects? Contact us!sales@schwahrtechnology.com
  • Application of sensors in production lines Mar 22, 2024
    Collecting data is a task that has been carried out since time immemorial in order to understand what ishappening around us; we measure parameters such as time, distance, temperature ..The same happens in the production lines, the unlimited capture of manufacturing, product and logisticsdata allows to take better decisions and add value throughout the production chain, The eauipment thatallows capturing all this data are the sensors. Sensors need to be reliable and robust when capturing dataon production lines in order to cope with diversity and potential changes in processes. Some sensors that we can find in theproduction lines There are many types of sensors that allow you to collect all kinds of data and measure differentparameters. Proximity sensors can be of different tupes capacitive., inductive, photoelectric or maaneticand detect movement, Temperature sensors alow the measurement of dearees in an environment, machine.product.. in addition, these types of sensors in production lines are used to guarantee optimal and safeoperation. There are also sensors to monitor different manufacturing parameters that can be useful in differentprocesses. There are many of humidity, fat, protein, degree of roasting, thickness, grammage .. Thesesensors are based on different technologies.Other sensors that are widely used in industry are pressure sensors, level sensors, or vibration or speed sensors. In addition to all these types of sensors, computer vision cameras are also sensors that provide data andinformation about processes. Computer Vision systems are intelligent sensors that capture images todetect actions, positions, defects, etc. They are intelligent since they are capable of generating responsesto the information theu obtain from the images. Sensors for the improvement of productionprocesses The application of sensors in production processes manages to provide a further degree of automationAutomation must be flexible to adapt to the different products and variants produced on the same ineManufacturing plants must be flexible and adaptable. There are a lot of products, more and more, factoriesproduce a great diversity of products, batches are getting smaller and more variable, This increases with thecustomization of the product for each client, so the sensors that allow automatina these productionprocesses must be able to adapt and adjust to each situation.Analysing the current production levels, four industrial challenges are presented to which the sensor canprovide more optimal automated solutions.          Improved quality control: more and more products are produced, and it becomes more difficult tocheck the auality of these products manually. Ouality requirements are also getting higher and there isa need to make them more efficient. Therefore, the automatic detection of failures and the obtainingof all the possible data of the products and their production is reguired. This is obtained by sensors ofall kinds.          More flexible automation: production and logistics management need to adapt quickly and profitabluto possible needs or changes that may arise in a production process. For this, intelligent sensors areused that, through data analysis, are able to adapt production to needs.           Safety in work environments: the interaction between people and machines must be carried out safely.taking into account the safety and ergonomics of the work environment. By making machines moreintelligent through sensors, they become one more collaborator who interacts with people and takescare of dangerous or repetitive tasks that do not add value to the final product.            Follow-up and traceability: the sensors allow to improve the way of identifying and tracking productsthroughout any production process. Traceability is important from production, through transport anddelivery to the customer. The flow of materials must be transparent to make decisions faster. Do you want to apply sensorics in any of your Projects? Contact us!sales@schwahrtechnology.com    
  • PLC in automation: what it is andfunctions Mar 21, 2024
    PLC and automation are two concepts that go hand in hand. And a programmable logic controller (PLC) has become an indispensable tool for the industrial and technological development of any company. More and more companies are turning to logistics automation in order to achieve greater performance in their warehouses. Faced with a market in constant transformation, with shipments within 24 hours and changes in consumer habits, robotization provides speed and reliability when moving large volumes of merchandise. What is a PLC? A PLC is an industrial computer that fulfills a basic function: managing the movements of the warehouse's automated handling equipment such as, for example, stacker cranes or conveyors. To do this, activate and deactivate electrical devices such as signaling beacons, relays or motors on each machine. One of the characteristics of PLCs is that they operate in real time, that is, they can react and activate machine movements in a matter of milliseconds. PLCs are made up of different components , basically: a CPU - the central unit that processes the program and stores data related to the system - and the modules that allow the physical connection between the industrial computer and the automatic systems that must move. The programmable logic controller also needs hardware and software to interpret the instructions and functions that each machine must perform. Through the information received through sensors and input devices connected to each machine , the PLC processes the data and sends orders to the maintenance equipment. For example, let's imagine that a conveyor automatically moves a pallet to an elevator. When the sensor detects the product, the PLC will order the transfer of the pallet to the elevator and its subsequent transfer to the corresponding level.   By digitizing and automating all merchandise movements, the PLC can also monitor and keep track of data in real time , such as operating temperature or machine performance. How does a PLC work? The programmable logic controller usually uses a field bus, that is, an industrial communication network that connects the system with the different components of an automated warehouse: sensors, electric motors, valves, switches, among others. PLCs can also be equipped with safety devices that ensure reliable operation of the machines and minimize any possibility of error. The PLC usually works together with a SCADA (Supervisory Control And Data Acquisition) system , a digital tool for supervision and data collection that facilitates decision-making in the warehouse : it allows knowing the status of a machine or where it is located and where it is located. where a moving pallet is headed. Through an HMI interface ( human machine interface ), logistics managers can visualize and order specific movements or reactivate work areas where several machines are located. In a logistics center, the same PLC can direct the movements of several automatic systems . Some machines, such as  pallet stacker cranes, have their own onboard PLCs incorporated . These latest generation automatic equipment have their own programmable logic controller to control their positioning, speed and acceleration in order to achieve a higher work rate. The stacker cranes adapt to the needs of each warehouse in terms of loading capacity, dimensions of the merchandise, construction height or required cycles. PLC, WCS and WMS: differences and functions Different software and hardware elements are involved in an automated warehouse: Programmable logic controller (PLC). Hardware that interprets information from higher-level computer programs to order the execution of movements of automated systems. Control software (WCS) . Application that allows you to develop and simulate the PLC program that controls and coordinates the movements of the automated elements of a warehouse. Warehouse management software (SGA). It organizes the entry and exit of merchandise and synchronizes the operations of the automated warehouse with the movements of the operators, among many other processes.   The coordination between the three systems facilitates the development of operations and compliance with the required cycles. warehouse control PLC and software Automatic handling equipment can operate following the instructions of a PLC or an industrial PC equipped with Easy WCS , control software. Easy WCS is designed to compile and execute structured text language instructions. The software supports the IEC standard for PLCs to direct goods movement and location management in an automated warehouse. The program incorporates all the information of each machine in its internal library at three levels: Mechanic. The software stores the technical data of each machine and can make an animation of each element in three dimensions. Electric. Easy WCS also records which electrical components each machine includes and how to control it. Software. The system contains the instructions that guarantee the operation of each machine and the movements it must perform. Working with Easy WCS provides advantages such as, for example, its ability to make simulations of the automated warehouse. The software of each machine can modify and adapt its functionalities taking into account the particularities of each installation .   By controlling all elements of the automated warehouse, Easy WCS can create a virtual representation of all elements of the facility , from merchandise to storage systems and handling equipment. Using a simulation, companies can visualize processes in a virtual environment in order to make decisions and introduce changes without interrupting operations. PLC and automation: strategic alliance PLCs constitute a fundamental tool in automated warehouses. They are used so that the robotic handling equipment fulfills the planned cycles and manages the merchandise in an organized way. Faced with increasingly demanding logistics, companies are looking for solutions to offer an effective service to customers without incurring cost overruns. One of the most viable options is automation which, optimized thanks to a PLC, can become a strategic alliance to drive business and address changing consumer demands.   At Schwahr we have a long history designing and developing automatic installations for all types of organizations. If you are considering automating your supply chain,  contact us and we will find a solution that suits the needs of your company.sales@schwahrtechnology.com
  • Development of digital temperature and humidity sensors Mar 14, 2023
    The global temperature sensor market is expanding rapidly and is expected to reach $8.8 billion by 2027, an increase of $2.5 billion compared to the current level. This growth is mainly due to the proliferation of applications that require accurate temperature measurement, such as sensors for control and monitoring in consumer electronics and industrial applications. For example: used to monitor high-density components in PCB design. In PCB design, heat dissipation issues usually have a serious impact on system performance. And, in a growing number of battery-powered solutions, precise temperature control is critical to ensuring a safe user experience.   In the past, digital temperature sensors were mainly widely used in consumer electronics such as smartphones and smart speakers. With the continuous innovation of technology and the emergence of a large number of new use cases such as predictive maintenance, autonomous machinery, process monitoring, equipment and robotics, and to meet the needs of accuracy, cost and industry standardization, digital temperature sensors are beginning to be used in industrial fields. And gradually replace traditional analog sensors. This shift is largely due to the development of Industry 4.0 and the proliferation of digital devices and components on the market today.   It is an inevitable trend for digital temperature sensors to be used in leading industries such as process automation, monitoring, medical and mobile applications. Our products are very suitable for industrial automation and home healthy living, such as our digital temperature and humidity recorder, which has a compact and portable design. screen, high measurement accuracy, built-in high-performance microprocessor, and a variety of probe options, superior performance, and long-term stable performance. And some of our digital temperature and humidity recorders can make full use of the established WIFI communication network to achieve data collection and transmission, achieving the purpose of centralized monitoring of temperature and humidity data. It can greatly reduce the construction volume and improve construction efficiency and maintenance costs. Schwahr Technology Co., Ltd. is a supplier of automation solutions with sensors as the core. It is backed by many powerful factories and can provide all kinds of sensors and various automation solutions you need. If you are interested in digital temperature sensors, Feel free to contact us anytime.sales@schwahrtechnology.com
  • Robot experiment guide Dec 01, 2022
    The manipulator is a multifunctional machine that can be automatically controlled and can be reprogrammed to change. It has multiple degrees of freedom. The manipulator of this project mainly adopts servo control, and three servo motors are respectively controlled by X \ Y \ Z triaxis servo driver to realize one-axis motion control, two-axis arc, linear straight insertion control, three-axis three-dimensional linkage control, and also realize the same speed motion control with synchronous belt. The manipulator training room can train the students to control the complex movements with the industrial network connection of the touch screen, servo, frequency converter and other controllers. This training equipment provides an advanced and good learning and practice equipment for students in mechatronics, electrical and other related majors. Provide a good curriculum design and practical training base for major-related departments and departments, create a professional scientific research platform for teachers, and an important medium for school-enterprise communication and cooperation. The majors involved in this training equipment include (1) Realize functions such as servo single-axis drive and servo three-axis linkage drive. Can teach courses such as "Robot Drive Technology" and "Servo Principles and Applications". (2) Realize the multi-speed, analog, tension adjustment and other functions of the frequency converter. Can teach courses such as "Principles of Frequency Converters and Their Applications". (3) "Electromechanical Equipment Fault Diagnosis and Maintenance", "Electromechanical Transmission and Control", "Electrical Control and PLC", "Computer Control System", "Pneumatic Control Technology", etc.
  • Several common pressure transmitter faults and solutions Feb 22, 2022
    Common pressure transmitter faults and solutions. The main faults are: 1 When the pressure goes up, the transmitter cannot go up. In this case, you should first check whether the pressure interface is leaking or blocked. If not, check the wiring method. If the wiring is correct, check the power supply. If the power supply is normal, check whether the sensor position has output, or simply pressurize to see the output. Whether there is a change. If there is a change, it proves that the sensor is not damaged. If there is no change, the sensor has been damaged. Other reasons for this may be damage to the instrument, or problems with other parts of the entire system. 2 The output of the pressure transmitter does not change, and the output of the pressure transmitter suddenly changes, and the pressure relief transmitter position cannot go back. The cause of this phenomenon may be caused by the sealing ring of the pressure sensor, which has been encountered several times by our customers. Generally, it is due to the specifications of the sealing ring (too soft or too thick). When the sensor is tightened, the sealing ring is compressed into the pressure port of the sensor and blocks the sensor. When pressurizing, the pressure medium cannot enter, but it suddenly bursts open when the pressure is very high. The sealing ring and the pressure sensor change under pressure. When the pressure decreases again, the sealing ring returns to block the pressure port. The remaining pressure cannot be released, so the sensor position cannot be lowered. The way to troubleshoot this problem is to remove the sensor, check directly whether the position is normal, and if so, replace the sealing ring and try again. 3 The transmitter output signal is unstable The reasons for signal instability are as follows: A. The stress source itself is an unstable pressure B. The instrument or pressure sensor has weak anti-interference ability C. The sensor wiring is not secure D. The sensor itself vibrates heavily E. Sensor failure 4 The transmitter has no output when connected to power Possible reasons are: A. Wrong wiring (check both instruments and sensors) B. Open circuit or short circuit of the wire itself C. The power supply has no output or the power supply does not match D. The meter is damaged or the meter does not match E. Sensor damaged 5. There is a large comparison deviation between the transmitter and the pointer pressure gauge. First, deviations are normal. Second, confirm the normal deviation range. Methods to confirm the normal error range: Calculate the error value of the pressure gauge. For example: the pressure gauge range is 30bar, the accuracy is 1.5%, and the small scale is 0.2bar. The normal error is: 30bar*1.5%+0.2*0.5 (visual error)=0.55 bar 6 Error value of pressure transmitter For example: the pressure sensor range is 20bar, the accuracy is 0.5%, the instrument accuracy is 0.2%, the normal error is: 20bar*0.5%+20bar*0.2%=0.18bar. The possible error range in the overall comparison should be based on equipment with large error values. The error range shall prevail. For the above example, the deviation between the sensor and the transmitter within 0.55bar can be considered normal. If the deviation is very large, an accuracy instrument (at least higher than the pressure gauge and sensor) should be used for reference. 7 The influence of the installation position of the micro-differential pressure transmitter on the position output Since the measurement range of the micro-differential pressure transmitter is very small, the self-weight of the sensing element in the transmitter will affect the output of the micro-differential pressure transmitter. Therefore, the position changes that occur when installing the micro-differential pressure transmitter are normal circumstances. When installing, the axial direction of the pressure sensitive part of the transmitter should be perpendicular to the direction of gravity. If the installation conditions are limited, the transmitter position should be adjusted to the standard value after installation and fixation. Schwahr  Technology Co., Ltd. is driven by innovation and quality, focusing on providing sensors, PLC, HMI, customized power supplies, servo motors, frequency converters, instruments and other automation products and solutions. If you have any questions about pressure sensors, Welcome to ask questions and let’s communicate together.sales@schwahrtechnology.com
  • Application and impact of sensors in the automotive industry Mar 07, 2024
    Automotive sensors are critical components of vehicles. It is an electronic device and an input device for the automotive computer system. It is composed of sensitive elements, conversion elements, conversion circuits and auxiliary power supplies. It is used to sense, communicate, evaluate, record and display information about the operation of the vehicle's internal and external environment. Automotive sensors can convert various working condition information during vehicle operation, such as vehicle speed, temperature of various media, engine operating conditions, etc., into electrical signals and transmit them to the computer so that the engine is in optimal working condition. There are many automotive sensors. When judging a sensor failure, you should not only consider the sensor itself, but the entire circuit where the failure occurred. As an information collection source, automotive sensors can be divided into body sensing sensors and environment sensing sensors based on different information collection contents. Among them, body sensing sensors can be divided into temperature sensors, pressure sensors, speed sensors, flow sensors, position sensors, etc.; environment sensing sensors are divided into visual sensors, radar sensors, positioning sensors, etc. Main types specific type Application areas Body sensing sensor Temperature Sensor Mainly used to measure the temperature of the intake manifold, fuel, coolant, and exhaust gas. Pressure Sensor Mainly used to measure the pressure of the fuel tank, fuel injection, brake fluid, and tires. speed sensor Mainly used to measure engine crankshaft, camshaft and wheel speed. Flow Sensors It is mainly used in automobile engines to measure the transient and steady-state mass airflow entering the engine. position sensor Mainly used to measure the position of brake pedal, gear lever, variable valve and clutch. environment sensing sensor vision sensor Refers to the vehicle-mounted camera, which collects information through the camera and performs algorithm recognition. radar sensor Including ultrasonic radar, lidar and millimeter wave radar. Positioning sensor Refers to the high-precision positioning sensor, which is used to achieve precise positioning of the vehicle. Among them, position sensors dominate the market. Position sensors are used in vehicles to detect the position of steering columns, pedals, manifold flaps, and various actuators and valves. They can identify and transmit data about the position of the roof or seats, the closing of the roof or doors, and trigger important vehicle functions appropriately. Owing to its diverse uses, the position sensor industry is expected to dominate the automotive sensors market share during the forecast period. Pressure sensors are an important part of automotive safety devices and engine functions. The temperature monitor market is also expected to expand. They must observe the transmission oil temperature, exhaust gas temperature, engine oil temperature, fuel temperature and cooling water temperature to ensure the service life of the car engine. The automotive industry continues to grow globally, primarily due to changing customer preferences, growing concerns about driver safety, environmental concerns, and strict government regulations that focus on collision avoidance rather than crash survival. Continuous pressure to meet efficiency and safety standards is fundamentally driving the need for sensor deployment. Data shows that the global automotive sensor market is expected to increase from US$2.051 billion in 2020 to US$6.462 billion in 2029, with a compound annual growth rate of 14.3% from 2022 to 2029. In recent years, driven by national policies and the rapid development of smart cars, my country's automotive sensor industry has also entered a stage of rapid development, with the market size continuing to grow. Data shows that my country's automotive sensor market will grow from 15.73 billion yuan in 2017 to 26.39 billion yuan in 2021, with a compound annual growth rate of 13.8%. It is expected that as key technologies such as 5G, Internet of Things, and artificial intelligence become increasingly mature, car sales and autonomous driving penetration rates increase, and in line with market trends and government policy support, my country's smart car industry will develop rapidly, and the demand for smart sensors will continue to increase. , which will also promote the continuous expansion of the automotive sensor market; it is predicted that the size of my country's automotive sensor market will reach 49.65 billion yuan by 2026. Schwahr Technology is a professional automation solution provider with sensors as its core. It is backed by many powerful factories and can provide all kinds of sensors and various automation solutions you need. If you are interested in automotive sensors, Feel free to contact us anytime.sales@schwahrtechnology.com
  • The difference between servo motor and stepper motor Feb 27, 2024
    People who work in the machinery industry believe that they have more opportunities to deal with servo motors and stepper motors. Especially friends who do mechanical design, often need to consider whether to use a stepper motor or a stepper motor? This time we will learn more about the stepper motor. Learn the difference between motors and servo motors so that we can make a good choice. Different control methods Stepper motors and servo motors have different control methods. Stepper motors control the rotation angle by controlling the number of pulses. One pulse corresponds to one step angle. Knowing the number of pulses the angle of rotation can be calculated. But the servo motor is controlled by the length of the pulse time controls the rotation angle, so there is a difference between the two. The controller is also different We generally use stepper motors, which require stepper drivers, while servo motors are controlled by servo drivers. The working equipment and work processes of the two are also different. Different low frequency characteristics If the stepper motor is at low speed, it is prone to low-frequency vibration, which is very detrimental to the operation of the machine. So is there a solution? The answer is yes, electrical engineers can add dampers and drives can use segmentation technology to improve some low-speed performance. The low-speed performance of the servo motor is relatively good and the operation is very stable, so the servo motor can also be used in many low-speed working conditions. Speed ​​affects torque differently One characteristic of stepper motors is that the higher the speed, the greater the torque drop. We can clearly see this situation from the motion curve of the stepper motor. Therefore, if the speed of the stepper motor is too high, it will have no power. This is why the speed of the stepper motor is generally controlled at about 300-600 revolutions per minute. The AC servo motor can output constant torque, that is, it can output a rated torque within the rated speed (200 or 3000rpm), which means that the torque is not affected by the speed. This is an advantage of the servo engine. Different overload capabilities The stepper motor does not have overload capability. If the load exceeds the rated load, the stepper motor is prone to out-of-step and is inaccurate. The parameter that reflects the torque of advanced motors is static torque. The so-called static torque is the maximum torque of the stepping motor in the critical state between rotation and non-rotation. On the contrary, the servo motor has a relatively strong overload capacity and can generally allow 3 times overload. However, it is still not recommended to overload the servo motor for a long time, because the motor will generate more heat and affect the service life of the motor. Different reaction speeds It generally takes about 200-400 milliseconds for a stepper motor to rise from 0 speed to working speed. Servo motors respond much faster. It only takes a few milliseconds for the servo motor to rise from 0 speed to working speed, so the response is very fast. The performance of servo motor is more suitable for fast start and stop situations. The price difference is obvious The price of stepper motors is much cheaper than Hefu motors. Therefore, when replacing servo motors, many companies like to use stepper motors, mainly to reduce costs. If cost is not considered, servo motors are superior to stepper motors in many situations. Choosing a servo motor or a stepper motor requires a combination of the characteristics of the above two. Generally speaking, stepper motors are suitable for applications where the speed is not very high. Regarding torque, we can increase the output torque by configuring a reducer.      
  • What key technologies do industrial robots contain? May 10, 2024
    Industrial robots(Especially SCARA four-axis robot robots and 6 Axis Robot,for example SCH-AR4215 4-axis Industrial/ Robot SCH-SD700 6 Axis Industrial Robot ) are important automation equipment in modern manufacturing that integrate multi-disciplinary advanced technologies such as machinery, electronics, control, computers, sensors and artificial intelligence. The widespread use of industrial robots can not only improve product quality and output, but also have great significance in ensuring personal safety, improving the working environment, reducing labor intensity, improving labor productivity, saving raw material consumption and reducing production costs. Industrial robot welding technology Key technologies of industrial robots include: 1. Open modular control system architecture: using a distributed CPU computer structure, divided into robot control motion controller, photoelectric isolation control board, sensor processing board and programming teaching box, etc. 2. Modular and hierarchical controller software system: The software system is built on a real-time multi-task operating system based on open source, and adopts a layered and modular structure design to achieve the openness of the software system. The entire controller software system is divided into three levels: hardware driver layer, core layer and application layer. 3. Robot fault diagnosis and safety maintenance technology: Diagnosing robot faults through various information and performing corresponding maintenance is a key technology to ensure the safety of robots. 4. Networked robot controller technology: Currently, robot application projects are developing from single robot workstations to robot production lines, and the networking technology of robot controllers is becoming more and more important. The controller has serial port, fieldbus and Ethernet networking functions. It can be used for communication between robot controllers and between the robot controller and the host computer to facilitate monitoring, diagnosis and management of the robot production line. The main task of industrial robot control technology is to control the movement position, attitude and trajectory, operation sequence and action time of industrial robots in the work space. It has the characteristics of simple programming, software menu operation, friendly human-computer interaction interface, online operation prompts and ease of use. Like computers and network technologies, the widespread application of industrial robots is increasingly changing human production and lifestyle. If you want to know more about industrial robots, please continue to pay attention to the updated information of our website.!sales@schwahrtechnology.com
  • Analyze the role of pressure sensors in the use of air compressors Dec 22, 2023
    The role of pressure sensor in the use of air compressor With the continuous advancement of technology, air compressor operation has become inseparable from the assistance of pressure sensors.The purpose is to make the air compressor operate more stably and safely in industrial production.So how does the pressure sensor work during the operation of the air compressor? The air compressor pressure sensor is the core component for measuring pressure. Taking a chemical plant as an example, because some pneumatic valves and pneumatic instruments require instrument air, and some production links require process air for mixing and mixing, an air compressor is essential. few.In the normal operation of a screw air compressor, there are several processes: suction, sealing, transportation, compression, and exhaust.  During the transportation process, oil and gas are compressed, and the oil-gas mixture with higher pressure is discharged.By installing a pressure sensor on the rear air outlet pipe, the compressed air pressure can be controlled.When the pressure reaches the upper
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