Linear actuator has 12-micron repeatability

Paul Boughton

A new high-speed industrial linear actuator from Copley Motion Systems has a specially designed low-profile body that makes it more compact so that it can be easily integrated into confined spaces in machines.

This latest addition to the Servotube family, the Servotube 11, measures just 28mm wide by 61mm high while still delivering the power, controllability and speed (up to 5.2m/s) expected from linear motor technology.

The Servotube 11 linear motor pushes and pulls loads speeds normally associated with pneumatic cylinders, but with 12-micron repeatability. The speed of the Servotube provides equal productivity to pneumatics with added controllability, allowing machine builders to produce much more flexible, programmable machines. Highly dynamic motion is made possible by peak forces ranging from 46-92N with a continuous force approaching 20N.

Copley Motion Systems says that one advantage of advanced tubular linear motor technology is that a longer stroke is possible than when using existing small linear actuator technologies; for example, with the Servotube 11, a stroke of over 230mm possible.

Designed for easy integration, the Servotube 11 has an industry-standard M20 end mounting and T-slots. The linear actuator can also make use of existing pneumatic-compatible accessories.

Lubricant-free plastic bearings are used, making the Servotube suitable for use in hygiene-critical or dirty environments and reducing maintenance in general industrial automation. A defining feature of the Servotube family, the new small linear actuator does not require an external encoder, making it excellent for use in washdown environments. Also, both the bearings and cable are field-replaceable to minimise downtime.

When combined with Copley Controls' new Ethercat-compatible Accelnet Micro Panel DC servo amplifier, the Servotube 11 becomes a versatile out-of-the-box small linear actuator. The resulting linear motion system is versatile, compliant with the Low Voltage Directive and suitable for safe use in virtually all industries, from medical inspection equipment to packaging machinery or 'desktop' laboratory automation.

The new Servotube 11 will be available in volume from mid-January 2007 in both linear actuator (moving rod) and also linear motor (moving motor body) models.

For more information, visit www.copleycontrols.com

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