Estun Servo Drives

EDB Series Servo Drive
With a power range from 200w to 5Kw, EDB series is designed to meet general purpose applications. Mature servo software control technology and hardware design lead to high performance. Features include high overload capacity, auto disturbance rejection, control flexibility, single axis positioning, windows-based

EDC Series Servo Drive
EDC series is designed for lower cost applications with step and direction control. Composing software by C language ensures high responsiveness. A palm operator is necessary to set, change or monitor the parameters. EDC series has 8-node build-in positioning points, windows-based software and RS232/Canopen

High Overload Capacity
Responding performance greatly improved with new functions like current forward-feed control, acceleration forward-feed control, speed observer and observer etc., Updated with control mode switch function, effectively reduce overshoot and adjustment time by setting appropriate switch function.

High Overload Capacity
EDB/EDC servo drive utilizes larger capacity industrial grade intelligent power modules (IPM) than normal servo with the same power capacity. Therefore, they have stronger overload capacity, higher disturbance rejection capacity and larger startup torque. The servo drives assure three times overload capacity for types below 1.5Kw at rated speed and 2.5 times above 2Kw.

Auto Disturbance Rejection
The most updated high speed DSP is used to meet the control requirements of high speed, high precision servo. With its auto disturbance rejection control and speed observation control algorithm, combined with compensation servo delayís forward-feedback control, reference smoothing technique, the servo drives have much better dynamic features and stabilities than those with conventional PI control. Servoís real fast response, high precision, high speed and high stability are realized. In addition, being equipped with automatic inertia identification, it makes adjustment operations easier.

Communication Interface
Standard CAN bus interfaces are available in EDC series servo which makes it easy to get integrated into a distributed control system. Based on Modbus Protocols of RS485 or RS232 interfaces, the host can be connected up to 32 servos for network control & the transmission distance can reach 1200 meters in maximum(if RS485 interface be used). Besides, the host can also communicate with PLC, DCS, intelligent instruments, touch screen and so on for centralized monitor.

Flexible switching
Position control, speed control and torque control are combined all in one in EDB servo drives. Itís available to switch dynamically among different control modes and operation is more convenient and flexible. Windows-based ESview Computer Software With special window-based computer software, the following functions are achieved:
Parameter management Fast and convenient operations to all parameters are available, such as editing, transmission, comparison and initialization.

Real time monitoring of all I/O signals, alarm of the present and history record, and system status etc.
Real time sampling Real time sampling the curves of speed and torque facilitates the adjustment and analysis.

Fast adjustment of gains is available.Sample test is available when there is no position or speed reference input.

Single Axis Positioning Function
The 16-node single axis positioning function is built inside the servo drives, and a touch screen can be connected directly to the RS-232 interface on the servo drives, thus the costs go down since an intermediate PLC unit is eliminated. With the touch screen, user may program easily every nodeís position, speed, acceleration, deceleration time, latency time, start point and stop point, moreover, the above info can be transmitted to the servo drive via RS-232 interface. User may select to program absolute values or incremental values and select cycle run or not. User may also use reference point search function and program the go and back speed for reference point search and in addition, itís also available to use external signals for step changes. Actually user may develop own application programs to meet different demands on different occasions.

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