. Aktuelle Top 7 von 2020 im Test und Vergleich. auf Vergleich.org vergleichen und günstig online bestellen Super Angebote für Stepper Motor hier im Preisvergleich. Vergleiche Preise für Stepper Motor und finde den besten Preis Stepper motor systems using closed-loop control represent a small percentage of stepper motor applications, but if loss of position could be catastrophic to the application, yet the system requires high torque at low speed, relatively simple architecture, and relatively low cost (compared to a true servo motor system) a closed-loop stepper might be the most appropriate solution Vorteile gegenüber Servo-Motoren. Closed-Loop-Schrittmotoren von Nanotec stellen in vielen Fällen eine Alternative zu Servoantrieben dar, etwa bei Aufwickel-Anwendungen oder Bandantrieben. Nicht nur die Drehzahl und die Position sind genau regelbar, sondern wie typischerweise für Aufwickel-Anwendungen erforderlich, das Drehmoment (Torque Mode). Closed-Loop- Schrittmotoren vereinen damit die. This CNC kit included: 1 x P Series Nema 24 Closed Loop Stepper Motor 3Nm/424.92oz.in with Encoder 1000CPR 1 x Closed Loop Stepper Driver 0-8.0A 24-48VDC for Nema 17, 23, 24 Stepper Motor 1 x 1.7 m(67) Long Encoder Extension.. $121.81 As low as : $98.61. Add to Cart. TP Series 1 Axis Closed Loop Stepper CNC Kit 4.5Nm/637.38oz.in Nema 34 Motor & Driver SKU: 1-CL86T-P45. This CNC kit included.
This video is about Arduino Closed-loop Stepper Motor BIGTREETECH S42B V1.0 Closed Loop Driver Control Board WHERE TO BUY :: https://bit.ly/3beKHg8 RGBDuino. Closed Loop Schrittmotor-Kombinationen . Bei der AZ-Serie ist uns gelungen einen kompakten, mechanischen Absolutwert-Sensor zu entwickeln. Dieser Sensor ermöglicht großes Einsparpotential in der Planungs- und Inbetriebnahmephase, da die batterielose absolute Positionierung keine Referenzfahrt in der Initialsequenz notwendig macht
Nema 23 Closed Loop Stepper Motor 1.2Nm with 1000CPR Encoder. Nema 34 CNC Stepper Motor 7Nm (991oz.in) 86x86x100mm 8 Wires Φ12.7mm Shaft. Nema 34 CNC Stepper Motor 4.5Nm (637oz.in) 4A 86x86x80mm Key Way Shaft. Nema 23 CNC Stepper Motor Bipolar 3Nm (425oz.in) 4.2A 57x57x112mm 4 Wires. 1.8deg Nema 23 Stepper Motor Bipolar 1.9Nm (269oz.in) 2.8A 57x57x76mm 4 Wires . Nema 23 Bipolar Stepper Motor. Closed-loop stepper systems supply the motor with just enough current to control the load, and this results in much less audible noise than open-loop setups. To produce the test results shown in the plot of acoustic noise accompanying this article, the acoustic noise of each system is measured in a soundproof chamber. The closed-loop system is dramatically quieter than the open-loop option at. Closed Loop Stepper Motor Performance - αSTEP. These stepper motors use our AlphaStep closed loop technology to maintain positioning operation even during abrupt load fluctuations and accelerations without hunting or gain tuning. The rotor position detection sensor monitors the rotation speed and amount. When an overload condition is detected, it will instantaneously regain control using the. Closed-loop stepper motors eliminate many of the disadvantages of traditional open-loop stepper systems, making them similar in performance to servo motors. But servo motors outperform even closed-loop steppers in applications that require high speed, high torque at high speed, or the ability to handle changing loads. Feature image credit: Advanced Micro Controls, Inc. You may also like.
With closed-loop feedback, servo motors deliver high accuracy positioning coupled with better speed and acceleration than stepper motors. The trade-off is increased cost, size, and complexity. The closed loop stepper motor system offers accurate and precise position control through feedback from the integrated encoder without the hassle of tuning and vibration of conventional servo motors. The encoder feedback provides information of the current position in reference to the input pulse with a high resolution of 10,000 pulses per revolution, allowing precise and accurate position. Leadshine Closed Loop Stepper Motors Authorized Distributor and Service Center in India is MAS Auto Systems Pvt Ltd, Mumbai. Call +91.989220300 Closed Loop Stepper Motor Packages . With the development of our AZ Series, we have introduced a compact, low-cost, battery-free mechanical absolute sensor. This affordable motor series allows for productivity improvements and cost reductions. Beside pulse input types, built-in controller types are available and equipped with RS485 Modbus interface. Closed Loop Stepper Motor and Driver Package.
China 57eh83A Closed Loop Stepper Motor Servo Motor Enam23, Find details about China NEMA 23, Stepper Motor from 57eh83A Closed Loop Stepper Motor Servo Motor Enam23 - Guangzhou HANPOSE 3D Technology Co., Ltd The closed-loop control of stepper motor can determine the phase transition with the rotor position by using position feedback and (or) speed feedback, which can greatly improve the performance of stepper motor. In the closed-loop control system of the stepper motor, or the tracking and feedback with specific accuracy, we should expand the range of working speed, improve the tracking and. MKS SERVO42B is 3d printer closed loop stepper motor NEMA17 MKS SERVO42 developed by Makerbase that prevents losing steps. CPU is STM32F103C8T6 ARM 32-bit Cortex™-M3 CPU Core,72 MHz. Magnetic encoder is Allegro's A1333LLETR-T Contactless 0° to 360° angle sensor IC ,12bit .This Project open source hardware and code,support platformio build and u Today we will wire up a TMC4361A-EVAL + TMC2130-EVAL combination to drive a stepper motor closed loop with an Arduino Uno. The encoder used for this test has a resolution of 10.000 cpr respective a resolution of 40.000. Preparation For this tutorial the Eselsbruecke got a soldered connection between +5V_USB (pin 5) t
Closed - loop stepper motors Konzept und Eigenschaften Conception and properties Konzept und Eigenschafte Unsere Serie von Schrittmotoren mit Closed Loop und integrierter Elektronik stellt einen großen Fortschritt dar. Encoder, Treiber, Controller und Indexer sind im Schrittmotor eingebaut und bilden eine geschlossenen Einheit mit hoher IP-Klasse und EMV Sicherheit. Die Motoren bieten eine. Closed-Loop Stepper Motor Manufacturers, Factory, Suppliers From China, The many thoughts and suggestions is going to be drastically appreciated! The great cooperation could boost each of us into better development The most frequently used system is an open loop unit driving a stepper motor. Bipolar steppers with two coils (4 wires) are used in 3D printers. Change in current direction in the coils of a stepper makes the motor moving one step. Controlling the current of one coil relatively to the other gives finer movement control allowing to divide main steps in what is called 'microsteps'. Such control. A closed-loop stepper motor system may be the best option when the application requires improved energy efficiency and smoothness of operation, especially at high loads. In addition, a closed-loop stepper system has the advantage over servo motor systems of higher torque at low RPMs. Additional benefits include short transient times, less packaging, accurate/correct positioning using feedback. With a superior closed loop control and a cost-effective design, the stepIM provides an efficient and economical solution for applications that require the performance of a servo at the price level of a stepper. The stepIM significantly enhances the performance of the stepper motors, when compared to conventional open loop control. The integrated electronics control the stepper motor as a two.
The AR Series stepper motor adopts our AlphaStep technology closed loop control so the motor does not lose synchronism even when subjected to abrupt load fluctuation or acceleration. Requires AR Series Driver. 3.35 in. (85 mm)/ 3.54 (90 mm) Frame Sizes; Closed Loop; AC or DC Input; Single or Double Shaft; Geared Type Availabl Modern motion controllers can include the ability to run stepper motors with encoder feedback, resulting in true closed-loop motion control. This mode of motor control is very similar to standard three-phase brushless servo motor control, where the three phases are offset 120 electrical degrees. With steppers, the motor has two phases offset by 90 electrical degrees 1.2 Closed-loop motor control prevents step loss Phase currents are assigned directly to the motor drivers, typical for stepper motor drivers. This results in current vector which should be followed by the rotor. The rotor position will be directly sampled by encoder feedback. The closed-loop motor control now monitors the resulting load angle. The direction of the current vector tracks the.
Closed-Loop Stepper Motor Manufacturers, Factory, Suppliers From China, Please sense no cost to speak to us anytime. We are going to reply you when we receive your inquiries. Remember to note that samples are available before we start our business enterprise Closed-loop stepper motors are an advanced development of classical stepper motor technology. They eliminate the limitations and drawbacks of classical stepper motors: The calculation or purchase of a safety reserve (normally up to 50%) is not required Greater efficiency during load fluctuations and no stoppage on overloa Download White Paper Figure 1 - Linear stepper motor Modern motion controllers can include the ability to run stepper motors with encoder feedback, resulting in true closed-loop motion control. This mode of motor control is very similar to standard three-phase brushless servo motor control, where the three phases are offset 120 electrical degrees
TI's integrated circuits and reference designs help you create compact, robust and efficient stepper motor drives with high-resolution positioning, accurate torque and smooth motion from zero to high speed. Multiprotocol industrial interfaces ensure easy control through the PLC or industrial PC. Closed loop stepper drive systems often require: Small form factor, efficient and protected power. Closed-Loop Stepper Motor Systems Our closed-loop stepper motor systems combine the advantages of stepper motorand servo systems for applications requiring high performance and high reliability at an economical price. Closed-loop control with integrated rotary encoders ensures you won't lose steps up to maximum stepper motor torque Popular closed loop stepper motor control of Good Quality and at Affordable Prices You can Buy on AliExpress. We believe in helping you find the product that is right for you. AliExpress carries wide variety of products, so you can find just what you're looking for - and maybe something you never even imagined along the way. If you are interested in closed loop stepper motor control. AR Series Closed Loop Stepper Motors The AlphaStep AR Series stepper motors offer high efficiency, low vibration, continuous operation with the security of closed loop performance without hunting or gain tuning
Closed-loop stepper motors change the performance-cost ratio in motion control for many applications. Exceptional accuracy and energy efficiency enable stepper motors to operate in applications where more expensive servo motors have dominated. Closed-loop steppers are ideal for multiple-axis applications, positioning tasks with load changes, and other applications that require quiet operation. The closed loop system is an ideal improvement and a good replacement of open loop system, Besides that, it also have some function of AC servo motors, but price is just half of AC servo. 2.2) Features 2.2.1 Stepper motor closed loop system, never lose step. 2.2.2 Improve motor output torque and working speed Stepper motor brake Synchronous pulley AC servo motor Close loop stepper motor Linear hybrid stepper motor 42 Precision Geared stepper mo 42 Geared stepper motor 28 Geared stepper motor NEMA16 39mm 2 phase 1.8° hy NEMA14 35mm 2 phase 1.8° h Thus, a closed-loop stepper motor is basically nothing more than a high-pole brushless DC servo motor (BLDC). All of the disadvantages traditionally associated with stepper motor technology, such as resonances and excessive heat development, are no longer an issue The closed loop stepper motor system is a low-cost, high-performance servo system. It is suitable for a variety of large-scale automated equipment and instruments that require low-cost, low vibration, noise, high-precision and high-speed
-AlphaStep Closed Loop Stepper Motor and Driver : Graph-17 oz-in 0.12 N·m-1.1 in 28 mm-24 VDC -Round Shaft (No Gearhead) --Not Equipped : Request Quote -Add To Cart Request Quote: ASC46AK-AlphaStep Closed Loop Stepper Motor and Driver : Graph-42 oz-in 0.3 N·m-1.65 in 42 mm-24 VD A closed-loop stepper motor system, such as the 86BHH76-860H, may be the best option when the application requires improved energy efficiency and smoothness of operation, especially at high loads. In addition, a closed-loop system has the advantage over servo motor systems of higher torque at low RPMs. Additional benefits include short transient times, less packaging, accurate/correct. Bringing Closed-Loop Functionality to Stepper Motors. by Emmet Cole, Contributing Editor Motion Control & Motor Association Posted 05/27/2020 Stepper motors are exquisitely simple devices that have found several uses in automation applications. Automation systems designers like the ease with which stepper motors can be controlled: Instruct a stepper motor to turn 1,000 steps forward and 75.
Closed Loop Schrittmotor-Treiber-Kombination mit Absolutsensor 0.36° (AZ DC) (FLEX BIGTREETECH S42B V1.0 Closed Loop Driver Control Board 42 Stepper Motor 3D Print. $22.37. $24.85. Free shipping . BIGTREETECH TMC5160 V1.2 High Power Stepper Motor Driver For SKR V1.3 PRO/V1.4 . $16.20. $18.62. Free shipping . BIGTREETECH SKR V1.4/Turbo Control Board 32 Bit WIFI+TMC2209 TMC2208 UART Driver. $18.95. $21.06 + $2.99 shipping . BTT EXP-MOT V1.0 Driver Expansion Module For EXP. ACT Motor GmbH ist ein High-Tech-Unternehmen, das sich auf die Entwicklung und Herstellung von Hybrid-Schrittmotoren, bürstenlosen Gleichschrittmotoren, Servomotoren und deren Treiber spezialisiert hat. Inkl. Verbindungskabel zum Closed-Loop-Treiber
The closed loop system is more reliable and accurate. But this system is very expensive and requires high maintenance. Key Differences between Open Loop and Closed Loop System. The open loop system means the output of the system is free from their input. In the closed-loop system, the desired output depends on their input Closed-loop stepper motor. Brushless DC Motor. STEPPER DRIVER. CERTIFICATIONS. CONTACT US. PRODUCTS. 1.2°Spuare 57mm (NEMA23) 3Phase Hybird Stepper Motor. 1.2°Spuare 86mm (NEMA34) 3Phase Hybird Stepper Motor. 1.2°Spuare 110mm (NEMA42) 3Phase Hybird Stepper Motor. 1.2°Spuare 130mm (NEMA52) 3Phase Hybird Stepper Motor . Read More. ABOUT US. Changzhou Suncor Motor is specialized in stepper. SSDC series is a high performance, intelligent Step-Servo system (Closed-Loop Stepper System) for multi-axes field bus control, Supporting pulse/direction control, analog control and multiple field bus controls such as Modbus, CANopen, SCL/eSCL commands, EtherNet/IP and EtherCAT protocol. And SSDC series also supports Stand-alone Programmable Function(Q programmer). Item Supply Voltage Control. Closed-loop step motors offer many advantages over traditional, open-loop step motor systems, including higher torque and acceleration, higher machine throughput, higher positioning accuracy, less heating, greater efficiency, and quieter operation. Designs that integrate motors, drives, and encoders are the next evolution in step motor technology. Each integrated motor is a closed loop stepper. JVL closed-loop integrated stepper motors, QuickStep®, provide higher torque, faster acceleration, torque control, stall free operation and quieter movements than traditional step motor systems. QuickStep do this with greater efficiency and less motor heating because motor phase current are regulated up and down according to need
12NM Nema34 Closed Loop Stepper Motor Drive Control Kit, DHL, EMS, FEDEX, fast shipping Full closed loop control, motor encoder with 1000 line, close to 100% of the torque output Segment set range is 2-256, fast response, high speed, light isolation fault alarm output interface ALM RS232 serial port communication available to download or change parameters; Over-current, over-voltage. China Step-servo motor/Closed loop motor catalog of High Torque NEMA 17 Servo Closed Loop Stepper Motor 1.8degree 4phase 5V 1.2A 42mm, Encoder Step New Closed Loop NEMA 17 Stepper Motor (42SHD6428-24Q) provided by China manufacturer - Guangzhou Fude Electronic Technology Co., Ltd., page1
e-Series Closed Loop Steppers 2 Closed Loop System The eCL system is an innovative closed loop stepper motor and controller that utilizes motor mounted feedback to constantly monitor shaft position. Actual motor shaft position data is updated every 25 microseconds allowing the drive to compensate for sudden load changes ensuring accurate position control. • In-position output signals. CLOSED LOOP STEPPER MOTOR Manufacturers, Factory, Suppliers From China Cheap Stepper Motor, Buy Quality Home Improvement Directly from China Suppliers:New Lichuan 5.5N.m closed loop step motor LCDA86H+LC60H2127 stepper servo motor 2 phase stepper motor driver Nema24 closed loop Enjoy Free Shipping Worldwide! Limited Time Sale Easy Return
NEMA34 110AC Closed Loop Stepper Motor 1699 oz-in, Driver - Hybrid Servo Kit: This kit is best for big mill machine and CNC router 1: NEMA 34 Closed Loop Motor: KL34-11N-1000: 1699 oz-in, shaft size: 1/2 Specification: Current: 5A Holding Torque: 12 N-m, 1699 oz-in Encoder on back: 1000 line Phase Inductance: 12 mH 110 Closed LoopNEMA 34 Motor (751) 2: 110VAC KL11008 Driver Specification. Oriental Motor Europa GmbH / Closed Loop Stepper Motor and Driver Package with Absolute Sensor 0.36° (AZ AC) (FLEX): Specialist for stepping motors, linear drives, AC-Motors and brushless DC-Motors, actuators and fans Closed loop stepper motors were chosen because they work with existing 3D printer electronics. Adding feedback eliminates the missed step problem inherent to stepper motors and allows for more accurate microstepping as the measured angle is controlled, not the step count. Add Tip Ask Question Comment Download. Step 2: Materials and Tools . MATERIALS. 3 x 1/4 aluminum bar (2-3 ft) 1/8. NEMA34 110AC Closed Loop Stepper Motor 1699 oz-in, Driver - Hybrid Servo Kit: This kit is best for big mill machine and CNC router. 1: NEMA 34 Closed Loop Motor: KL34-12N-1000: 1699 oz-in, shaft size: 14 mm ( Not 1/2) Specification: Current: 5A. Holding Torque: 12 N-m, 1699 oz-in. Encoder on back: 1000 line . Phase Inductance: 12 mH. 110 Closed LoopNEMA 34 Motor (1602) 2: 110VAC KL-110-80H. Closed Loop Stepper Motor System Ai-SERVO is a closed loop stepper motor system developed by Autonics. The system offers accurate and precise position control through feedback from the integrated encoder. The encoder feedback provides information of the current position of the motor in reference to the input pulse
Closed Loop Microstepping is a true closed loop mode of operation, and is the optimum use of a stepper motor still being driven as a stepper. Closed loop operation brings with it the risk of instability if the loop is not correctly tuned, so care must be taken to achieve stability Precision Bearing House is leading Stepper Motor Drive, 2 Phase & 3 Phase Stepper Motor Suppliers from last 30 years. Our latest product is Closed Loop Stepper Drive that is Stepper Motor with encoder. Shop online through pbh.in for Stepper Motors & Stepper Drives in New Delhi, Chennai, Ahmedabad Nema 23 closed loop stepper motor with encoder is a stepper motor with encoder, above add do not add the encoder is also have different opinions, are still a little of step motor with encoder, the encoder on the stepper motors have the effect of feedback and protection, if you give in motor walk 100 steps, if there is no encoder, then you don't know if stepper motor is precise walk 100 steps. The AZ Series Closed Loop Stepping Motors is the new generation of high precision positioning motors. Equipped with a batteryless (ABZO) sensor and with a closed-loop configuration, the AZ Series achieves productivity improvement and cost reduction. AZ Series DC Powered type AZ Series AC Powered typ
Changzhou Jinsanshi Mechatronics Co. Ltd. is a comprehensive company which specializes in producing and researching stepper motor and motor driver. Our company is located in Changzhou city, Jiangsu province, China. We own an excellent group with rich experience in manufacturing and researching. In this field, we have rich experience, so that we can solve the actual using problems for customers Mechaduino is a board that sits on a regular stepper motor and turns it into a servo with a closed loop control of 0.1degree. Whenever we post something about using cheap brushless motors for.. Stepper motors are inherently open-loop devices. They don't require feedback because each pulse of current delivered by the drive equals one step of the motor (or a fraction of a step, in the case of microstepping) If a stepper motor misses a step, the entire layer of the print - and every layer thereafter - will be off by just a tiny bit. Miss a few more steps, and that print will eventually make its way..
The StepSERVO™ closed loop stepper system produced much higher peak torque and higher torque at higher speeds than the open loop stepper system, which allowed us to drive the same load at an acceleration rate of 2000 rev/sec2and to a speed of 20 revs/sec. By doing so, the move duration was reduced to 60 milliseconds ES-MH342120 is a 3 phase NEMA 42 12.0NM stepper motor with integrated 1,000-line incremental encoder. When driven by the ES-DH2306 drive to take direct 220/230 input voltage, the position loop between the motor and drive is fully closed. Therefore, loss of steps which limits adoption of stepper systems is totally eliminated This is a review of the MKS Servo42 Closed Loop Stepper Motor. It has an integrated Allegro A1333 angle sensor. Accuracy is about 6.75 arc seconds. They are not cheap: US $37, or $43 with the display. And the built-in driver (also Allegro, A4954), is not smooth enough though. The advantages are: running cool, and no missed steps Stepper motors are brushless DC motors with many internal teeth that magnetically lock into position with surrounding copper coils. Unlike brushless motors, applying power to a stepper motor will not make it turn. Instead, it locks into a position specified by the inputs given and turns either clockwise or counterclockwise by a small step SMCI33 - Closed-loop stepper motor controller Compact closed-loop positioning controller for stepper motors. Housing size: 90 x 60 x 22 mm. Controlled via RS485 or CANopen. Six optocoupler inputs for 5 to 24 V. Ideally suited for industrial applications and switch cabinets
Leadshine India - sales and service of stepper drives, stepper motors, motion controller, servo drives and servo motors. +91.9892203008 firstname.lastname@example.org EMC can do closed loop control with step motors. basically you use a servo configuration where the encoder based real position and commanded position from the trajectory go into a PID loop and the output of the PID loop drives the step generator in velocity mode, This arrangement simulates a velocity mode servo with the step motor
Open Loop Scenario: The system is commanded to go to a position of 9. The controller sends out 9 pulses. The motor moves 9 steps. Since there is no feedback providing position data to the controller, it assumes that since it sent out 9 steps for the motor to move that the motor is in the correct position. Closed Loop Scenario Also being a Closed Loop motor, it means that it has a built in encoder that monitors steps and position of the motor at any given time. This means it will self correct and you will not have any missing steps. Included with the motor upgrade is extended spacers, bolts and coupler. Closed Loop Stepper Motor Upgrad - Closed-loop vector control technology ensures the high torque output, while ensuring that the motor does not lose step. - With overvoltage, overcurrent, tracking error or over-error, and other protection features
When open-loop stepper performance isn't suitable for an application, an engineer will typically use a closed-loop three-phase brushless motor. This solution can become costly especially if high torque performance is also required. However, now it is possible to use Galil's 2 Phase Brushless (2PB) option with stepper motors to gain the advantages of both stepper motors and closed-loop three. Closed-loop stepper-motor control with step-loss compensation is a common performance-boosting algorithm for stepper systems. In one prevalent form of step-loss compensation, an angle sensor or encoder tracks the motor-rotor position and any missed steps. Then the controller records its commands and the actual motor position from the encoder converting position data to the equivalent. Re: Marlin Firmware and Closed Loop Stepper Motor June 19, 2019 11:26AM Admin Registered: 12 years ago Posts: 12,71 Closed-loop stepper with step-loss compensation is the most common type of closed-loop stepper control. The stepper drive operates as a micro-stepping drive and typically receives pulse and direction commands to move to the desired position. An encoder tracks shaft or load position. If lost steps are detected, a compensation algorithm inserts additional steps so that the motor shaft (or load.
Global Closed Loop Stepper Motor Market By Type (Permanent Magnet , Hybrid , and Variable Reluctance), By Application (Industrial Machineries , Medical Equipment , Packaging and Labelling , and Semiconductor), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-202 A stepper motor operates in an open loop system, with no feedback mechanism to confirm that the motor actually reached the commanded position. But achieving a precise position is generally easier for stepper motors because they move in discreet steps—with up to 500 steps per revolution, meaning that each step equals 0.75 degrees of motor rotation. When operated within their design limits. Offered in NEMA23, NEMA24, and NEMA34 flange-size, the closed-loop smart stepper motor delivers the efficiency of a servo drive while offering considerably more torque than servo motors of comparable size at low speeds Closed Loop Stepper Motor Packages Open Loop Stepper Motor Packages AC-Input DC-Input Stepper Motors Network Converter Controllers Drivers Accessories Open Loop Stepper Motor Packages . AC-Input. Overview; Microstep with Integrated Controller 0.72°-0.00288° (RKII) Microstep 0.72°-0.00288° (RKII) DC-Input. Overview; Microstep 1.8°/0.72°/0.36° (CVK) Microstep 0.72° with Speed Control. Sumtor (Wuxi) Electric CO., Ltd is a professional company to produce stepper motors, servo motors, stepper motor drivers, electric motor controllers, engraving machine and some other items, which is near to Shanghai. It only takes 50 minutes from Wuxi to Shanghai by train