Consider hydraulic or pneumatic actuators if your work does not include electrical voltage input. Some actuators are ideal for heavy-duty work in rough environments, but they may not work well when it comes to handling smaller work like packaging which requires precision and the ability to repeat the same action hundreds or thousands of times. The purpose of an actuator is to move or lift an object. Find out, in your case, how much this object weighs.
The load capacity of an actuator decides how much it can lift, and although many actuators may look similar, their load capacity will vary. Before you buy an actuator, make sure the weight of your object matches the capacity of the actuator. Distance, or stroke length as it is technically known, matters here. The stroke length decides how far your object can be moved. Manufacturers often sell actuators of varying stroke length.
The speed of the actuator is often an important factor for most people, depending on their project. Usually, projects that require actuators to exert high force would move slower than those that generate low force.
Speed of an actuator is measured in distance per second. Does the actuator need to work in a rugged or rough environment, where dust or humidity is a concern? If this is the case, you would want to choose a product with higher protection rating. Actuators in the market come in different mounting styles and understanding their benefits is necessary before buying an actuator.
For instance, a dual-pivot mounting method in a linear electric actuator allows the device to pivot on both sides while extending and retracting. With this, the application gets to have two free pivot points while moving on a fixed path. Conversely, stationary mounting, which secures the actuator to an object along the shaft, is useful for actions such as pushing a button.
At this stage, you should be able to narrow down your options to a significantly smaller pool from where you started. From here, you will need to narrow down further. For instance, linear actuators come in different styles for different kinds of functions. Rod-style, for instance, is the most common and simple among them, with a shaft that expands and retracts. Track style, which does not change its overall length or size during operations are more suited when space constraints are an issue.
There are also column lifts and other actuators that would be ideal for setting up TV and table lifts. Factors such as operating voltage and motor type may also be worth considering. Choose the Actuator.
Performance metrics are quantifiable outputs that help you evaluate the quality of a particular product. Actuators can be considered under several performance metrics. Traditionally, most common among them have been torque, speed, and durability.
These days, energy efficiency is also considered equally important. Other factors that may be considered include volume, mass, operating conditions, etc. Naturally, torque is one of the most important aspects to consider in the performance of an actuator.
A key factor here is to note that there are two kinds of torque metric to consider, static and dynamic load.
Speed of an actuator differs depending on the weight of the load it is supposed to carry. Usually, the higher the weight, the lower the speed. Hence the speed metric should first be looked at when the actuator is not carrying any load. Although those such as hydraulic actuators are considered more durable and rugged compared to electric actuators, the detail specs on the quality of the material used will be up to the manufacturer.
With increasing concerns on energy conservation and its direct impact on operational costs, energy efficiency is becoming more and more a decisive metric in all kinds of machinery. Here the lesser the quantity of energy required for an actuator to achieve its goal, the better. Given the broad spectrum of actuators that are out there, different methods are used to connect them to the control.
Connecting an electric linear actuator is a rather simple process. Many electric linear actuators come with four pins these days and their connection is as simple as plugging them in. However, if your actuator does not have four pins, the process is slightly different. You will need to buy an additional connector, which often comes in 6- and 2-foot length. Your actuator might come with wires exposed at the end. You can strip back this a bit if required before connecting to a 4-pin connector.
Connect the linear actuator to the 4-pin connector by twisting the right exposed wires together and covering it up with electrical tape. Often the wires on the actuator and connector come in blue and brown colors and they can be connected accordingly. Sometimes, the colors may be different on the actuator. For example, if the actuator has red and black wires, connect the red to the brown wire of the actuator and black to the blue.
If it comes with red and blue, connect the red to the brown and blue to the blue wire on the connector. If the wires of the actuator are red and yellow, connect red to the brown wire and yellow to the blue wire. Now you are good to go. Plugin your connector and plug in the control box to the power socket. In case you run into trouble despite this, click here for a more detailed guide on connecting actuator to a connector.
Choosing an actuator and connecting it properly is only half the job done. Equally important is mounting the actuator in a method that is right for your application.
Below are two common methods that are used to mount an electric linear actuator. This method involves fixing an actuator on both sides with a mounting point that is free to pivot, which usually consists of a mounting pin or a clevis. Dual pivot mounting allows the actuator to pivot on either side as it extends and retracts, allowing the application to achieve a fixed path motion with two free pivot points.
One of the most useful applications of this method is to open and close doors. When the actuator extends, the dual fixed points enable the door to swing open. The action of the door closing and opening causes changes in angle, but the pivot provides ample space for the two mounting points to rotate. While using this method, make sure that there is enough room for the actuator to extend, without any obstacles on its way.
In this method, the actuator is mounted in a stationary position with a shaft mounting bracket fixing it to the shaft. Common uses of this kind of mounting are to achieve action similar to pushing something head-on.
For instance, this form of mounting is ideal for switching a button on or off. When deciding on this method, ensure that the mounting apparatus can handle the load of the actuator. Check Out. The uses of linear electric actuators are virtually endless.
Manufacturing plants use them in material handling. Cutting equipment that moves up and down and valves that control flow of raw materials are examples of this.
Robots and robotic arms within and outside the manufacturing industry also make use of linear actuator systems to achieve movement in a straight line. With home automation systems becoming popular, electric linear actuators have become useful in the function of automated window shades. Home appliances like TV can be placed at optimum height without hassle using TV lifts that make use of linear electric actuators. There are also table lifts which use actuators to adjust the height to the needs of users.
In the solar power industry, they help in moving the panels to the direction of the sunlight. Even in industries like agriculture, where heavy machinery that uses hydraulic actuators are more common, electric linear actuators are used for fine and delicate movements.
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