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Copley offers lower noise alternative to traditional pneumatic positioners

Posted: 14 Aug 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Copley Controls? pneumatic positioner? XX? XX? XX?

Copley Controls announced that they have developed a cost-competitive solution that's more flexible and much lower noise than traditional pneumatic positioners.

Members of the XSJ family of linear servo systems comprise a Servo Tube actuator (STA25 line) and a Micro Xenus controller, in three versions, that touts faster response and superior controllability/agility for applications at up to 2-, 6- and 10A. The actuator-controller is designed as a drop-in, plug-and-play replacement for ballscrew and pneumatic positioners; no added components are required.

The company's ServoTube actuator is driven directly from the Micro Xenus controller; there are no intervening motors, gearing or couplings and no external encoder is required for position feedback. The ServoTube's permanent magnets are sealed into a stainless steel thrust rod; its electrical driver coils are encapsulated in the non-moving forcer. Using Hall sensors, the ServoTube touts a repeatability/settability to 12m. The pneumatic system generally uses slide wire potentiometers for positioning. As such, the ServoTube's MTBF can be expected to be significantly higher, said the company.

The Micro Xenus controller, a smaller version of the company's earlier Xenus controllers and working from a 120-240Vac source, can provide up to 10A peak output. The servo amp, suited to indexing, camming, gearing and position/velocity/torque control modes, is compatible with 10V position/velocity/torque, PWM velocity/torque, ASCII, stepper, digital and CANopen command interfaces. The matched positioning pair develops a velocity to 3.8m and a peak driving force of up to 87lbs.

The alternative to the XSJ, said Copley Controls, is a mechanically-based system that has an overall slower response, not up to today's positioning tasks. The pneumatic system also uses a compressor, and so noise levels will be much higher. The uptime of a mechanically-based system will be less, and users can expect operating and repair costs to be significantly higher as well.

With prices starting at $1,600, delivery is stock to 4 weeks ARO.

- Vince Biancomano

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