In the field of automation, especially at an industrial level, there are countless components that make a machine move and allow it to perform its tasks in the best possible way: this is the case of actuators, which convert energy to impart linear motion (linear actuators) or rotary (rotary actuators).
Among the most chosen, for quality of materials, variety and duration, there are undoubtedly the actuators on servotecnica.com, which are manufactured and selected by a company with 40 years of experience in the motion control sector.
Linear actuators
Where a rotary movement must, therefore, convert into a more or less powerful thrust o continuous, a linear actuator will be employed. In industrial field, these elements are crucial, for example, in conveyor belts, in production lines where heavy loads are expected to be lifted, in robotics, or even in systems for opening and closing doors in means of transport, to give the right movement to the photovoltaic panels, as well as to position a chaise longue or a diagnostic machine in medical field.
Those of type brushless they are made without the use of brushes which, in the long run, can deteriorate or give rise to sparks with excessive heat. The advantages of stepper actuators (or step-by-step) are the low cost, high reliability, high torque at low speeds and a simple and robust construction that guarantees operation even in non-optimal environmental conditions. The nut, or snail, is the fulcrum of the movement that is transmitted and, depending on its positioning, gives rise to linear actuators of 3 different categories.
The configuration External Linear (or External Shaft) is the most “classic” type of linear actuator, thanks to its simplicity and compactness combined with a high degree of flexibility in the design phase. In the external nut configuration, the motor shaft is replaced by one nut screw. In a typical application, the motor is mounted in a fixed position and the load is attached to the nut. As the nut rotates, the outer nut travels longitudinally on the screw, returning a linear motion.
In the design of the linear actuators Captive the screw is integrated on a splined shaft. The shaft is constrained in rotation by a groove on the front of the motor. In this way, linear motion is obtained without the shaft rotation / load. This choice is particularly suitable for applications without mechanics to eliminate rotation. Work travels are relatively limited.
In Non-Captive configuration (unconstrained), the nut is incorporated in the motor rotor. As the rotor rotates, it creates linear motion by passing the lead screw through the shaft. In this case, the load can be secured in one of two ways: directly to the engine, or to the nut screw. As the rotor rotates, it moves the motor along the length of the nut creating a linear motion.
The Linear actuators have applications even on small surfaces and, in this sense, the best type to choose is represented by the tubular ones, where the motor body is made up of a series of solenoids that set in motion a stem containing a set of magnets very powerful perms and aligned in alternating and opposite directions.
Rotary actuators
Where there is a need for a classic circular movement, rotary actuators are used. These are simpler elements when compared to the linear ones, as their structure does not include one motion direction transformation.
The motors can be of the brushless type, to increase their duration and performance and can be coupled to mechanical reducers in order to increase the output torque.
A rotary actuator consists of one stator, by a rotor, by a position or speed sensor, which signals the position of the rotor in relation to the stator and by bearings. The latter are specifically created to give optimal performance even in the presence of significant loads, both radial and axial.
Actuators can be controlled via fieldbus, such as Ethernet Ip, Can Open or EtherCAT. In order to bring the various components back to a not excessive temperature, especially after massive use, they also provide cooling systems which often make use of special liquids.
In the field of automation, especially at an industrial level, there are countless components that make a machine move and allow it to perform its tasks in the best possible way: this is the case of actuators, which convert energy to impart linear motion (linear actuators) or rotary (rotary actuators).
Among the most chosen, for quality of materials, variety and duration, there are undoubtedly the actuators on servotecnica.com, which are manufactured and selected by a company with 40 years of experience in the motion control sector.
Linear actuators
Where a rotary movement must, therefore, convert into a more or less powerful thrust o continuous, a linear actuator will be employed. In industrial field, these elements are crucial, for example, in conveyor belts, in production lines where heavy loads are expected to be lifted, in robotics, or even in systems for opening and closing doors in means of transport, to give the right movement to the photovoltaic panels, as well as to position a chaise longue or a diagnostic machine in medical field.
Those of type brushless they are made without the use of brushes which, in the long run, can deteriorate or give rise to sparks with excessive heat. The advantages of stepper actuators (or step-by-step) are the low cost, high reliability, high torque at low speeds and a simple and robust construction that guarantees operation even in non-optimal environmental conditions. The nut, or snail, is the fulcrum of the movement that is transmitted and, depending on its positioning, gives rise to linear actuators of 3 different categories.
The configuration External Linear (or External Shaft) is the most “classic” type of linear actuator, thanks to its simplicity and compactness combined with a high degree of flexibility in the design phase. In the external nut configuration, the motor shaft is replaced by one nut screw. In a typical application, the motor is mounted in a fixed position and the load is attached to the nut. As the nut rotates, the outer nut travels longitudinally on the screw, returning a linear motion.
In the design of the linear actuators Captive the screw is integrated on a splined shaft. The shaft is constrained in rotation by a groove on the front of the motor. In this way, linear motion is obtained without the shaft rotation / load. This choice is particularly suitable for applications without mechanics to eliminate rotation. Work travels are relatively limited.
In Non-Captive configuration (unconstrained), the nut is incorporated in the motor rotor. As the rotor rotates, it creates linear motion by passing the lead screw through the shaft. In this case, the load can be secured in one of two ways: directly to the engine, or to the nut screw. As the rotor rotates, it moves the motor along the length of the nut creating a linear motion.
The Linear actuators have applications even on small surfaces and, in this sense, the best type to choose is represented by the tubular ones, where the motor body is made up of a series of solenoids that set in motion a stem containing a set of magnets very powerful perms and aligned in alternating and opposite directions.
Rotary actuators
Where there is a need for a classic circular movement, rotary actuators are used. These are simpler elements when compared to the linear ones, as their structure does not include one motion direction transformation.
The motors can be of the brushless type, to increase their duration and performance and can be coupled to mechanical reducers in order to increase the output torque.
A rotary actuator consists of one stator, by a rotor, by a position or speed sensor, which signals the position of the rotor in relation to the stator and by bearings. The latter are specifically created to give optimal performance even in the presence of significant loads, both radial and axial.
Actuators can be controlled via fieldbus, such as Ethernet Ip, Can Open or EtherCAT. In order to bring the various components back to a not excessive temperature, especially after massive use, they also provide cooling systems which often make use of special liquids.
