Moving-Coil Actuator Offers Improved Cycle Life

SMAC has developed a moving-coil actuator - the LCA series - designed to replace pneumatic cylinders, with an expected 10 times improvement in cycle life over pneumatics. The first model in this series, the LCA25, has a small overall footprint of 25mm (H) x 50mm (W) and length depending on stroke. Starting with stroke length of 10mm, the range will extend up to 100mm, with encoder resolutions from 20 micron to 50nm.

With this level of accuracy the unit can be used for precise positioning and measuring. A slide option is available for scanning applications. The LCA series have one- and three-coil versions that generate a force of 10N and 30N respectively, with accelerations greater than 40G possible. The LCA series is equipped with linear guide with built-in lubricant that offers extended cycle life.

The actuator also has a low power consumption of 1.5A peak at 24V and 48V, making them energy efficient and very quiet compared to old pneumatic technology. A 'Snap Together' design controls tight tolerance stack-up to assure high product quality. There is no adjustment of parts during the assembly of the actuator and maximum tolerance stack-up is held to less than 50 per cent of allowable. The LCA series is fully programmable in force, velocity and position mode.

The SMAC 'Soft-Land' function is incorporated to allow delicate and controlled force when landing on fragile components. The actuators also give 100 per cent data feedback of all operations as standard. Due to these features, no external switches or sensors are required to detect actuator movement or position. SMAC's linear encoders are incorporated in the LCA series.


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