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Inside an ETT Linear Motor

Jan. 19, 2016
This tubular linear motor consists of a stator with integrated analog Sin/Cos feedback and a stainless-steel rod with neodymium magnets.
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Parker’s Electric Thrust Tubular (ETT) Series is a tubular style linear motor made up of two main components: the stator with integrated analog Sin/Cos feedback 1 peak-to-peak voltage as standard (other standards are optional), and the rod, a stainless-steel AISI304 shaft with neodymium magnets. This allows for high-speed acceleration. Using linear-motor technology eliminates the need for an additional belt or screw, gearhead, and motor as in many electromechanical positioners. Tubular linear motors suit any pick-and-place or linear handling application that requires high dynamic positioning.

Tubular linear motors have some interesting advantages in typical applications, including no wear components, no seals to fail, and flexible control. This model incorporates iglidur X guide bearings from igus for high speed and high temperature ranges, and a Class H coil with three-phase standard brushless design and 1000-V winding insulation. The unit also features a DIN ISO 15552:2005-12 mounting footprint for integration into existing mounting contingencies.

This construction serves a number of different industries and applications, such as conveyor diverting, indexing, and pick-and-place, among others. Fully potted and sealed motor coils and rod deliver an IP67 rating, enabling it to handle harsh, wash-down applications.

About the Author

Jeff Kerns | Technology Editor

Studying mechanical engineering at Rochester Institute of Technology (RIT), he worked in the Polymer Research Lab. Utilizing RIT’s co-op program Jeff worked for two aerospace companies focusing on drafting, quality, and manufacturing for aerospace fasteners and metallurgy. He also studied abroad living in Dubrovnik, Croatia. After college, he became a commissioning engineer, traveling the world working on precision rotary equipment. Then he attended a few masters courses at the local college, and helped an automation company build equipment.

Growing up in Lancaster County, PA he always liked to tinker, build, and invent. He is ecstatic to be at Machine Design Magazine in New York City and looks forward to producing valuable information in the mechanical industry. 

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