Positioning Applications With the KLA Linear Actuator
Linear positioning actuator delivers strokes up to 8 mm with 5 µm precision
Shape memory alloys for speed, force and precision
From an electrical perspective, the KLA linear positioning actuator behaves as a purely resistive device, with a broad linear region over its stroke where position is linearly proportional to power input. In order to achieve high precision and accuracy, the use of closed-loop control is recommended, with a linear sensor the preferred feedback sensor. Complex communication or control techniques are generally not needed; in most cases a simple PI control loop can be utilized. The KLA linear positioning actuator can be connected to a Kinitics Controller, which drives the actuator and utilizes an analog gain signal (using a 4-20 mA input) or a PWM signal at the Pulse discrete input; in combination with a control system such as a PLC, an effective positioning system can be created.
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.
The KLA05 Linear Actuator uses shape memory alloys for high force, high speed and high precision, making it ideal for positioning applications.
Positional response under steady-state power
A more detailed application note on positioning applications with the KLA Linear Actuator is available. Contact us to receive a PDF copy.
Shape memory alloy-based actuator delivers high force and actuation speed in a small package.
- High force-to-size ratio
- Force up to 2600 N
- Stroke up to 8 mm
- AC and DC power options
Shape memory alloy-based actuator with medium pressure and fast actuation in a small package.
- High pressure-to-size ratio
- Pressure up to 15 Bar
- Displacement up to 6.28 cc
- Flows up to 14 LPH
AC and DC controllers to interface Kinitics Force and Piston Pumps with standard PLC.
- Compact size, DIN rail mount
- 120 VAC, 12 and 24 VDC versions
- Discrete I/O and analog gain input for multiple control strategies