Error Separation Techniques in Roundness Metrology

2008 ◽  
pp. 225-238
Keyword(s):  
Separation Techniques ◽  
Error Separation

scholarly journals Comparison of Current Five-Point Cylindricity Error Separation Techniques

2018 ◽  
Vol 8 (10) ◽  
pp. 1946 ◽  
Author(s):  
Wenwen Liu ◽  
Penghao Hu ◽  
Kuangchao Fan
Keyword(s):  
Industrial Applications ◽  
In Situ Measurement ◽  
Reconstruction Method ◽  
Separation Techniques ◽  
Actual Measurement ◽  
Error Separation ◽  
Advantages And Disadvantages ◽  
Cylindricity Error ◽  
Cylindrical Profile

Cylindricity is a kind of three-dimensional form distortion of a cylinder. An accurate in situ measurement of cylindricity is relatively complex because measuring and reconstructing cylindrical profile and evaluating out-of-cylindricity should be involved. Any method of in situ measuring cylindricity must solve a common issue, i.e., to eliminate spindle error motions and carriage error motions during measurement and reconstruction. Thus, error separation techniques have played an important role in in situ cylindricity measurement through multipoint detections. Although several valuable five-point methods for in situ measurement of cylindrical profile have been proposed up to present, namely the parallel scan, spiral scan, and V-block scan, there are obvious differences in many aspects, such as the arrangement of probes, error separation model, reconstruction method, adaptability to service environment, accuracy and reliability in practical application, etc. This paper presents the evaluation of their advantages and disadvantages in theory and the actual measurement based on the standard ISO 12180. Suggestions for best meeting the requirements of modern manufacturing and the most prospective one for industrial applications are also given.

Nanometer-Level Comparison of Three Spindle Error Motion Separation Techniques

2005 ◽  
Vol 128 (1) ◽  
pp. 180-187 ◽  
Author(s):  
Eric Marsh ◽  
Jeremiah Couey ◽  
Ryan Vallance
Keyword(s):  
State Of The Art ◽  
The State ◽  
Numerical Error ◽  
Separation Techniques ◽  
Error Separation ◽  
Level Measurement ◽  
Rotationally Symmetric ◽  
Error Motion ◽  
Aerostatic Spindle ◽  
Better Than

This work demonstrates the state of the art capabilities of three error separation techniques for nanometer-level measurement of precision spindles and rotationally-symmetric artifacts. Donaldson reversal is compared to a multi-probe and a multi-step technique using a series of measurements carried out on a precision aerostatic spindle with a lapped spherical artifact. The results indicate that subnanometer features in both spindle error motion and artifact form are reliably resolved by all three techniques. Furthermore, the numerical error values agree to better than one nanometer. The paper discusses several issues that must be considered when planning spindle or artifact measurements at the nanometer level.

Supplementary comparison EURAMET.L-S23 (#1269) high precision roundness measurement by error separation techniques

Metrologia ◽  
2017 ◽  
Vol 54 (1A) ◽  
pp. 04003-04003 ◽  
Author(s):  
Emilio Prieto ◽  
Rafael Muñoz ◽  
Aelio A Arce ◽  
Rob Bergmans ◽  
Gerard Kotte ◽  
...  
Keyword(s):  
High Precision ◽  
Separation Techniques ◽  
Error Separation ◽  
Roundness Measurement

scholarly journals A Comprehensive Review on Chemotaxonomic and Phytochemical Aspects of Homoisoflavonoids, as Rare Flavonoid Derivatives

2021 ◽  
Vol 22 (5) ◽  
pp. 2735
Author(s):  
Javad Mottaghipisheh ◽  
Hermann Stuppner
Keyword(s):  
Plant Species ◽  
Separation Techniques ◽  
Comprehensive Review

Homoisoflavonoids (3-benzylidene-4-chromanones) are considered as an infrequent flavonoid class, possessing multi-beneficial bioactivities. The present study gives an overview on phytochemical aspects of homoisoflavonoids, including utilized plant species, parts, extracts, and separation techniques. Overall, these compounds have mainly been isolated and identified from bulbs and rhizomes of the plants belonging to Asparagaceae and Fabaceae families, particularly the genera of Ophiopogon, Dracaena, Scilla, Polygonatum, and Caesalpinia.

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