Tag: Direct Drive Motors

Sinusoidal Scanning Motion Performance: Air Bearings vs. Mechanical Bearings

Application Description Most of the motion solutions we work on typically require either point-to-point positioning or constant velocity scanning motion. In these applications, customers are usually concerned with accuracy, repeatability, or velocity regulation. One special type of motion that is occasionally required is sinusoidal scanning motion. In these applications, the motion stage is expected to […]

Performance of Direct-Drive Linear Motor Stages in Precision Positioning Applications

Brushless direct drive linear motors provide advantages over leadscrew and ballscrew driven positioning stages when it comes parameters such as acceleration, maximum speed, accuracy, constancy of velocity, and avoidance of vibration. This article explains types of motors, encoders and provides test data of PI’s new V-551 linear motor stage.   Iron Core and Ironless Motors […]

Performance of a Large Motorized Rotary Air Bearing Stage for Synchrotron Crystallography

PI recently built a large 300mm diameter rotary air bearing stage for use in a synchrotron beamline test facility. The beamline, when finished, will be used for Macromolecular Crystallography. This stage was designed with the goal of achieving best-possible performance for the following specifications: Stiffness Load capacity Radial runout error motion Velocity smoothness The application […]

Scanning Performance of Air Bearings

1.  Introduction A common application in which an air bearing is specified is scanning. Scanning involves moving either a work-piece or an optic at a constant velocity, while a reading or writing operation takes place. Such operations include printing and image-setting (i.e., writing) and imaging (i.e., reading). While the physical act of writing an image […]

Force & Position Control in Precision Automation

A host of applications can benefit from fast actuation systems equipped with precise metrology for controlling both force and position accurately. These include: Fast production testing of touch- and force-sensitive and haptic components; Delicate, high-speed automated assembly procedures where position vs. force is important; Testing of physical characteristics such as compliance, damping or other material […]

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About PI

PI (Physik Instrumente) is a leading manufacturer of precision motion control equipment, piezo motors, air bearing stages and hexapod parallel-kinematics for semiconductor applications, photonics, bio-nano-technology and medical engineering. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 4 decades. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. PI is present worldwide with fifteen subsidiaries, R&D / engineering on 3 continents and total staff of more than 1,000.

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