What is a Servo Controller? Lenze Servo Motor | Lenze Servo Drive | CM Industry Supply Automation

The most specific kind of controller, which is utilized to control servo motors, is called the Servo controller. When you will deal with servo systems, don't forget to remember the definitions for servo controllers, servomotor, and servo systems, as their definition varies throughout the industry. When picking a servo system for an application, it is good to ask suppliers like CM Industry Supply Automation (which offers Lenze Servo Motor, Lenze Servo Drive, etc.) about what exactly they are offering.

A servo controller can be called the heart of a servo system. A usual servo system includes a motor, feedback device, and controller. The control circuitry usually includes a motion controller, which forms the motor's motion profile, and a motor drive, which passes on power to the motor regarding the commands received from the motion controller. Servo systems refer to closed-loop systems that have various advantages over open-loop systems. The fact is that the servo system improves transient response times, decreases steady-state faults, and decreases system compassion to load parameters.

Servo controllers' carry out two tasks i.e. commanded input tracking and improving disturbance rejection of the system. The most acknowledged method of control is PID control. PID is an acronym of proportional-integral-derivative control, which is a blend of proportional control, integral control, and derivative control. This method (PID Control) works on the error signal that is the difference between a commanded value and the real value of an output variable and making the error to zero. The proportional value can be considered as a simple gain value. The integral value incorporates the error over a period and tries to make the error to zero. The derivative value stabilizes a system, which utilizes an integral and proportional phrase only.

There are some important factors to consider while choosing a servo controller for an application. The foremost thing is to know which type of motor is to be controlled. Whether its an ac or dc motor? If the type of motor is dc, then check out whether it is brushless or brushed? This will be helpful to determine the type of commutation the motor requires and if the controller can hold it.

Always check out the axes of motion i.e. whether the application is a single axis control or multiple axes? Servo controllers are available for simple single-axis applications and multiple-axis motion-like robotics applications.

After that, check out how many channels of I/O are required? Beyond inputs for feedback signals like speed and position, are there any special input types required? Ensure that the controller can hold suitable feedback devices like tachometer inputs, incremental encoder signals, SSI,  resolver signals, and Hall sensor signals.

Another significant aspect that we forget to check is the controller setup. Remember, checking the controller whether it is easy to set up and program or not? Is programming take place via a keypad or can be programmed via a computer screen? Even consider the present communication links. Is there fundamental RS232 or RS485 links? Check the bus interfaces for standard networks such as Ethernet, CAN, Sercos, or DeviceNet? 

If you are not getting their right answers then drop an email to the CM Industry Supply Automation group at sales@cmindustrysupply.com or call on +91 8956113099 (India), +61432112288 (Australia), our professionals will guide you on the right path.