For every application in industrial automation, servo motors from Festo are easy to operate, extremely flexible, and offer maximum precision as well as reliability – and are very cost efficient too. Servo drives can control and hold positions, torque and speeds precisely and in fractions of a second. This enables complex machine drives that can also realise difficult production processes. That is why servo motors are particularly suitable in robotics and for automation solutions.
You can find more products in the following category: Motors and servo drives
Festo servo motors together with servo drives form the perfect link between your mechanical system and your control system, and they are quick and easy to commission as a complete drive system with the Festo Automation Suite. Our motto is maximum connectivity of hardware and software. You can put together combinations of electric products that completely meet your application requirements, irrespective of your electromechanical system and control environment.
Our EMMT-AS is a dynamic, brushless, permanently excited AC synchronous servo motor. It was designed primarily for demanding and dynamic applications. This motor, which is part of our Core Range, is characterised by an extremely low cogging torque, which enables it to achieve high synchronisation, even at low speeds, as well as good controllability and track accuracy in positioning tasks. The electronic rating plate contains all the important motor data. This can be read by the servo drive CMMT-AS and then used to automatically set the parameters for the servo motor. The space-saving one cable plug solution also significantly reduces installation effort.
The compact and extremely economical EMMB-AS is also a brushless, permanently excited AC synchronous servo motor. Available in four performance versions, it is suitable for simple positioning tasks, especially in the electronics industry, small parts assembly and in test stations. It is available as standard with a digital single-turn absolute measuring system, optionally also with a multi-turn system. When combined with axes ELGC, mini slides EGSC and motor controller CMMT-AS, the result is a perfect component match.
Reliable, dynamic, precise: the EMME-AS is our powerful AC synchronous servo motor with optimised connection technology for dynamic applications. The motor is available with classic 2-cable standard lines. Degree of protection IP54 on the motor shaft without shaft seal, IP65 on the motor shaft with shaft seal and for the motor housing and power/encoder connection ensure safe operation. The brushless, permanently excited synchronous servo motor is available in variants with absolute safety encoder, multi-turn and HIPERFACE®.
The term servo motor comes from the Latin word "servus" – "servant". This is because servo motors were originally designed as simple auxiliary drives for use in machine tools. Today, a servo motor is generally understood as being mostly an electric motor that has a control mechanism and can provide feedback on its rotational or linear position.
Servo motors are characterised by:
Servo motors can be operated with electronic position, torque or speed control. Sometimes they are also operated in a combination of different types of control mechanisms. They can be divided into two basic types – synchronous and asynchronous servo motors. The fundamental difference between synchronous and asynchronous servo motors lies in their operating mode and design.
A synchronous servo motor generates a magnetic rotating field that rotates exactly synchronously with the frequency of the applied voltage or current. The speed of the motor is thus directly proportional to the frequency of the applied voltage or current. Synchronous motors are typically used when high precision and speed are required.
An asynchronous servo motor, on the other hand, works differently. In an asynchronous servo motor, the magnetic field is generated by passing current through the rotor. The rotation of the rotor is caused by the interaction between the rotating magnetic field and the conductors in the rotor. The speed of an asynchronous servo motor depends on the load it is driving and is generally lower than that of a synchronous servo motor. Asynchronous servo motors are typically used for applications with higher torque.
So whether a synchronous or an asynchronous servo motor is better suited for the application always depends on the specific requirements.
Permanently excited synchronous servo motors, asynchronous motors and brushed DC motors are widely used as servo motors. AC servo motors are usually motors that are operated using supply voltages that are generated directly by rectifying an alternating voltage. In contrast, servo motors that can be operated directly using an extra-low voltage are called DC servo motors. However, this classification doesn't say anything about the motor type. According to this definition, permanently excited synchronous motors are used both as AC and DC synchronous motors. Asynchronous motors and reluctance motors are mainly used as AC servo motors; permanently or externally excited, brushed DC motors are used more as DC servo motors.
With increasing automation in all areas of machine and plant construction comes the need for ever shorter cycle times and greater flexibility when changing products. This development has led to the servo drives used today. These motors are mainly used for applications in the following industries:
Servo motors are particularly valued in these industries because their performance and application can be scaled. They always offer the right performance, whether as a direct drive for high-precision axes or as a cost-effective motor-gear unit combination. In addition, the effort and time needed to cable and install servo motors is low, as they can be used with digital signal transmission and combined cables.
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 servo 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.
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)
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.
There are various types of servo motors 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.
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.
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.