To begin with, we have to first understand the concept of 'servo'. What does it do and how does it function? In simple words servo may be defined as an automated instrument that controls the performance of any machine based on the continuous feedback. It functions in a closed loop—feedback, rectification and performance. So a servo control drive monitors the performance of a servo drive. It is an electronic amplifier that connects itself to the servo mechanism to monitor its performance.
How does a servo control drive function or how does it monitor the performance? It basically receives signals in the form of commands from the servo control system, amplifies it and then transmits the right amount of electric current to the servo motor to achieve the desired benefit. The sensors that are attached to the servo motor are responsible for feeding the actual performance data to the drive. Later, the actual data is compared to the desired data, the deviation noted and then rectification is done by transmitting the changed voltage frequency to the servo motor.
Different types of servo control drive are available in the market. Here is a list of the most common types used by the industries:
Normal servo drive are usually used for applications consuming less power.
- Digital servo drives are a bit complicated and are programmed to handle multiple applications.
- Multiple axis servo drives allow more flexibility to the machines as they are designed to handle higher voltage needs.
- Ethernet servo drives help in standardizing the entire communication network in turn leading to faster commissioning and more accurate configuration.
Servo control drives are widely used because of the many advantages or benefits. Implementing servo control drives reduces human intervention in machine usage and thereby increasing manpower productivity. It reduces errors and its effects and is more cost effective and improved productivity. This also increases flexibility that can be mapped across diverse types of machines. It also facilitates accurate output.
The servo control drives are much superior to the traditional AC or DC motors. The motor feedback feature is used to identify and unwanted disturbance thereby rectifying it and increasing accuracy. Servo drives are even known to have a longer life span than the old AC wound motors.
Industries like CNC machining, robotics and factory automation use servo control drives to reduce transient response times, lessen the sensitivity to load parameters, reduce the steady state of errors thus facilitating increased machine accuracy machine throughput.
For more information about servo motion control and motion control drives visit our website.
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Article by Jenny at Inter-dev Internet Marketing Company on behalf of Nanovibronix.com – servo drives
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