Canton, Mass.—Copley Controls' XSJ family of linear servo systems, starting at $1,600, is the company's answer to a cost-competitive solution that's more flexible and much lower noise than traditional pneumatic positioners.
The electronics-based system comprises 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 10 amps. 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 12 microns. The pneumatic system generally uses slide wire potentiometers for positioning. As such, the ServoTube's MTBF can be expected to be significantly higher, says the company.
The Micro Xenus controller, a smaller version of the company's earlier Xenus controllers and working from a 120-240 VAC source, can provide up to 10 amps peak output. The servo amp, suited to indexing, camming, gearing, and position/velocity/torque control modes, is compatible with ±10-volt position/velocity/torque, PWM velocity/torque, ASCII, stepper, digital, and CANopen command interfaces. The matched positioning pair develops a velocity to 3.8 meters/s and a peak driving force of up to 87 pounds.
The alternative to the XSJ, says the company, 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.
Click here to access the STA25's datasheets; click here for the general specs of the Xenus (versus Micro Xenus) servo drives. Delivery is stock to 4 weeks ARO. Contact Dean Crumlish.
Copley Controls, 1-781-828-8090, www.copleycontrols.com