Micro linear actuators are small devices used to move objects in a straight line. They work by converting energy into force and come in mechanical, hydraulic, pneumatic, electric, and electromagnetic types. They have lower load capacity and are commonly used in small electronics and toys.
A micro linear actuator is a small or compact device that moves something in a straight line. They’re used in compressed, confined areas to do things like open and close camera shutters, move small components in toys and scale models, and power small machines that make electronics. In addition to being much smaller than standard size linear actuators, the internal workings of the micro size models are very similar.
Actuators work by converting a form of energy, usually mechanical, hydraulic, pneumatic, electric, or electromagnetic, into a force that can lift or move an object. A mechanical linear micro actuator works by using some form of motor to turn a screw and bolt design or a wheel and axle design. The screw and bolt lift an object up and down; the wheel and axle design converts the rotary motion of the motor into linear motion – motion in a line – with belts or chains.
Hydraulic and pneumatic micro linear actuators work by using compressed liquids and gases to control the movement of an actuator arm. The only difference between the two types is that one uses liquid and the other uses gas. Some form of servo controls the amount of gas or liquid pressure that is used to press the micro linear actuator arm into its designated position, precisely lifting the payload to the desired height.
Electric and electromagnetic microactuators convert electricity into force or magnetism which creates a force. Both electric and electromagnetic micro linear actuators are less efficient than other actuators. Due to their simple design and low manufacturing cost, however, they are usually the type of micro linear actuator found on small electronics, radio-controlled vehicles, and other compact toys and scale models.
A micro linear actuator generally has a much lower load capacity than its larger counterparts. The use of different materials, such as composites and hard plastics, can affect the overall design and allow for higher payloads if needed. Capacity is usually measured using two separate calculations and the results are known as static load capacity and dynamic load capacity. Static load capacity is the ability of the micro linear actuator to lift a load and hold it in a specified position, while dynamic load capacity is the ability of the same actuator to move a payload at a certain speed.
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