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 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 standardized 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.
It is a self-contained electrical device that rotate parts of a machine with high efficiency and with great precision. The output shaft of this motor can be moved to a particular angle, position and velocity that a regular motor does not have. Festo servo motors feature a closed- loop mechanism that incorporate positional feedback. 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. A servo motor maximum torque is limited by heating (due to the amount of current required to produce high torque) Servo motors are closed-loop systems, that communicate back to the controller, which makes any needed adjustments to ensure the target position is reached
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. The brushless ac servo motors used by Festo, also called ac synchronous motors, have powerful permanent magnets in the rotor. The most important intrinsic features of these motors are a low mass moment of inertia, a high torque with the flat torque curve being an additional asset, making these servo motors extremely suitable as the drive medium in demanding applications in industry. Because they are brushless servo motors, they are also very low maintenance. These servomotors are, if necessary, equipped with planetary gears to increase the output torque and/or to adapt the motor’s inertia to the load. As soon as a controller generates specific set points for the required positions, the servo drives make sure, thanks to their excellent processing power, that the desired values are reached quickly and accurately. The drives take care of the control of the drives themselves, which means that they generate the sinusoidal voltages needed for the desired setpoints in order to reach these setpoints as quickly as possible. Servo controllers are available in many sizes and types, such as 5V or 12V supplied systems for applications with low power needs.
There are many different types of motor that 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 servo drives type CMMT-ST for actuating our stepper motors are very compact and attractively priced controllers, very suitable for not very dynamic motion. With synchronous servo motors, the controller measures the difference between the actual value that is tracked by an encoder and the desired value. These 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 motors are 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.
Using the parameters in our catalogue, 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 to request a login. 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 sales team if you need any support.