Linear Motors for Industrial Automation Applications

The high dynamics and low maintenance requirements are met by linear motors – low inertia, no friction, no wear. High resolution and accuracy is provided by a wide range of linear encoder options – absolute encoders, for example, save time and add functional safety because they render homing procedures obsolete and avoid run-away situations caused by incremental encoder signal transmission issues. Modern linear encoders can measure motion in increments smaller than one nanometer.

For high force applications, ball-screws with robust servo motors and the ability to run directly on 110/240 volts AC servo drives are available.  The ability for the end user to lubricate the ball screw rails without dismantling the stages is a great advantage.

Machine builders in the laser industry also need such positioning stages to offer good resistance to debris ingress and tolerance to hot particulates, so the linear stages have side sealing strips, air purge connections, and hard covers.  As the size and mass of the manufactured parts may be challenging, the system components used need to be highly precise, stiff, robust, and offer reliable performance.  Industrial motor connectors which are easy to handle and adjust, standard high flex cables, and the ability for the end user to lubricate the ball screw without dismantling the stages and other features often requested.

Design engineers who require ease of installation appreciate the machined reference edge on the new generation of linear stages for easy placement and alignment on their machine base.  Standard cable management options and flexible motor cable exits are further advantages. Other important requirements for the linear stage manufacturer are the capability to provide metrology data, error correction mapping or aligned XY or XYZ multi-axis combinations.