Servo motors

Electric drives

When accurate and dynamic movements are needed, or when travel to different positions is required, with speeds and/or forces that are perfectly controlled, then electric drive are the ideal solution. These consist of a linear actuator or rotary actuator, driven by a motor. The linear actuators, usually equipped with a mechanical guide, uses a toothed belt or spindle to transfer the rotary movement of the motors shaft into a linear movement. The rotary actuator has an integrated bearing so that the load is supported during the rotary motion. Dependent on the performance required and the dynamic response, we use synchronous servo motors or stepper motors, with the latter often also being equipped with an encoder so that they also operate reliably in servo mode These engines are controlled by a wide range of servo drives controls, with a standardised communication with the higher-order PLC systems. Speeds up to 10 m/s, acceleration to 50 m/s² and forces up to 17 kN are possible.

What is a servo motor?

A servo motor unit is a rotary or linear actuator that allows precise control of angular or linear position, speed and acceleration. Festo servo motor is a closed- loop system that uses position feedback to control its movement and final position. The cycle of feedback, error detection and correction is called closed loop control. A type of encoder serves as a sensor providing speed control and position feedback. Servos maximum torque is limited by heating (due to the amount of current required to produce high torque)

How do servo motors work?

In order to control a servo motor, you need a servo drive. The servo drive determines the voltage for the motor, and thus how quickly, with how much power and how long it rotates. Servo drives provide you with a relatively simple way to realize advanced motion control applications.

Types of servo motors

There are various types of motor and all have their advantages and disadvantages. Stepper motors are controlled by counting the number of steps that the motor makes, and the accuracy can be further improved through micro stepping. The Festo CMMT-ST for actuating our stepper motors are very compact and attractively priced controllers, very suitable for not very dynamic motion. The synchronous servo motors with relevant, compact servo controllers type CMM-T-AS have an extremely high dynamic response and a very high power density, ideal for controlling very critical movements.

Servo Motors vs Stepper motors

Stepper motor is a good solutions for applications with low speed, low acceleration, and low accuracy requirements. Stepper motor also tend to be compact and inexpensive. This makes these motors a good fit for medical, biotech, security and defense, and semiconductor manufacturing applications. Servo motor is a better choice for systems requiring high speed, high acceleration, and high accuracy. Servos are used in radio-controlled airplanes to position control surfaces like elevators, rudders, walking a robot, or operating grippers.

Buying servo motors?

Using the parameters in our catalog, you can easily search a servo motor. You can choose the motor type, flange size, high voltage, weight low voltage, the shaft, the cable, any accessories... If you want to see a price and delivery date, you need an account. This is only available for professionals/customer. If you agree with the delivery date, you can order the components, which will then arrive at the requested delivery address. You can contact our reliable sales team if you need any support.