NSF Controls is set to launch a breakthrough in short stroke actuator technology with the development of a Servo Linear Positioner (SLP) system. The SLP is an integrated and responsive linear actuator and position sensor contained within a single, compact unit. The design meets a long-standing requirement for a short stroke actuator with ultra-fine positional control. Designers have previously chosen from a relatively limited selection of technologies to meet this requirement. Typically these would be solenoids, moving coil motors, motorised screw units or pneumatic cylinders. The SLP system owes its functionality to a compact and rugged moving magnet design, which, using an innovative dual function configuration of windings, creates both a high efficiency linear thrust motor and a fully integrated, high performance absolute position sensor. The integrated sensor/actuator arrangement results in a compact assembly with a minimal number of electrical connections and a mechanically simple moving part. The unit is also electrically symmetrical which contributes to highly stable temperature performance as well as making it extremely easy to design into a given application. The SLP is easy-to-use, offering direct digital or analogue control through a simple, adaptable interface and easy-to-install, with direct coupling to driven parts and a straightforward, four-wire connection. Direct coupling also gives continuous wear free operation even under the most arduous conditions, while the system is adaptable for operation in the most extreme environments. Potential areas of application for the SLP include test/measurement and instrumentation, medical, acoustic control, machine tools, process equipment, robotics, probing, automotive and aerospace.
