Positioning Applications With The KLA Linear Actuator
Linear positioning actuator delivers strokes up to 7 mm with 5 µm precision
The Kinitics Linear Actuator (KLA) is a shape memory alloy-based precision linear actuator that delivers high force and high speed in a compact package, making it an ideal linear actuator for positioning applications. Electrically powered, the KLA actuator has only one moving part, the rod, and operates without the backlash common to lead-screw and ball-screw actuators, improving performance in a positioning application. Additionally, in continuous-duty holding operation the KLA Linear Actuator requires little power, making it an efficient alternative to fluid-power options. Forces up to 650N can be generated and maintained within sub-Newton accuracy while strokes up to 7 mm can be held to within 5 µm.
A typical control loop using a Kinitics Automation KLA Linear Actuator and KCA020 Controller.
As the voltage source can be modulated such that power input matches heat dissipation, holding the actuator at a desired position, our SMA-based linear positioning actuator is ideally suited for positioning applications
Efficiency
Shape memory alloy wires conduct electricity, and when current is applied undergo Joule heating to obtain a highly linear relationship between the wires’ length and energy input. This relationship makes the Kinitics SMA-based linear positioning actuator ideally suited for positioning applications, as the voltage source can be modulated such that power input matches heat dissipation, holding the actuator at a desired position. Furthermore, in a positioning application little power is required: Less than 8 percent of the actuator’s rated power (and even less, depending on the cooling medium) is required for the actuator to hold its rated load at a set position.
