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From aerotech.com
There are many factors that affect the ability of a rotary stage to perform accurately. Axis of rotation error motions, hysteresis, backlash, encoder errors, mounting surface quality, and applied loads all contribute to the quality and performance of a rotary stage or spindle. The following document defines and explains these errors in greater detail, as well as some other pertinent nomenclature relating to rotary stages and spindles. Axis of rotation error motion – An error motion of a rotary stage’s axis of rotation is defined as a change in position, relative to the reference coordinate axes, of the surface of a perfect workpiece, as a function of rotation angle, with the workpiece centerline coincident with the axis of rotation. From this point forward, axis of rotation error motion is designated as “error motion”. Products & Services
Rotary tables are used to position items so that they can be machined, worked, or assembled.
Rotary indexing tables are used to index components in defined, angular increments so that they can be machined, worked, or assembled in multiple operations. Tables can have fixed or adjustable indexing angles.
Broaching machines are used in a metal-removal process, broaching, that is similar to planing. They have rows of cutting teeth along a cutting axis.
Rotary positioning stages are devices with tables or shafts that may be rotated to any angular position. They may be driven or simple slides.
Multi-axis Positioning Systems make use of linear, rotary and goniometric stages, slides and drives in various combinations to create standard and custom positioning systems.
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Topics of Interest
There are many factors that affect the capabilities of a linear stage to position accurately in three-dimensional space. Abbe errors, straightness, flatness, pitch, roll, yaw, hysteresis, backlash,...
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Linear off-axis error introduced through amplification of tilt and wobble with a long moment arm. This type of error occurs when the point under measurement is at a relatively long distance from the...
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A Displacement Measuring Interferometer (DMI) measures linear and angular displacements with very high accuracy and precision. DMI’s are used in a variety of applications which can be broken into two...
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Abbe Error Linear off-axis error introduced through amplification of tilt and wobble with a long moment arm. This type of error occurs when the point under measurement is at a relatively long distance...
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Spinning mass gyroscopes use a steadily-moving mass with a free-moving axis (gimbal). They are very fragile and require regular maintenance. When a spinning mass gyro is tilted, the gyroscopic effect...
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Technical Articles
Rotary Stage Terminology
- Linear and Rotary Motion Components
Linear Stage Terminology
- Linear and Rotary Motion Components
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