Uncertainty analysis of a laser calibration system for evaluating the positioning accuracy of a numerically controlled axis of coordinate measuring machines and machine tools

2008 ◽  
Vol 32 (2) ◽  
pp. 106-113 ◽  
Author(s):  
H.F.F. Castro
Keyword(s):  
Uncertainty Analysis ◽  
Machine Tools ◽  
Coordinate Measuring Machines ◽  
Calibration System ◽  
Positioning Accuracy ◽  
Laser Calibration

Establishment of 40,000 A Rogowski coil calibration system and its uncertainty analysis

CPEM 2010 ◽  
2010 ◽  
Author(s):  
Yoon Hyoung Kim ◽  
Jae Kap Jung ◽  
Jeon Hong Kang ◽  
Sang Hwa Lee ◽  
Sang Ok Han
Keyword(s):  
Uncertainty Analysis ◽  
Rogowski Coil ◽  
Calibration System

Störgrößenkompensation für Vorschubantriebe/Disturbance compensation for feed drives

2021 ◽  
Vol 111 (01-02) ◽  
pp. 82-87
Author(s):  
Felix Brenner ◽  
Armin Lechler ◽  
Alexander Verl
Keyword(s):  
Machine Tools ◽  
Position Control ◽  
Dynamic Compliance ◽  
High Accuracy ◽  
Considerable Improvement ◽  
Disturbance Compensation ◽  
Positioning Accuracy ◽  
Feed Drives ◽  
Modern Machine ◽  
Large Machine

Zahnstange-Ritzel-Antriebe werden überwiegend bei großen Werkzeugmaschinen eingesetzt und häufig mit indirekter Lageregelung betrieben. Hieraus resultiert eine geringe Positioniergenauigkeit und ein unzureichendes dynamisches Nachgiebigkeitsverhalten. Um den hohen Genauigkeitsanforderungen moderner Werkzeugmaschinen gerecht zu werden, wird in diesem Beitrag eine beschleunigungsbasierte Störgrößenkompensation vorgestellt. Experimentelle Ergebnisse belegen eine Verbesserung des Störverhaltens.   Rack-and-pinion drives are mainly used in large machine tools and controlled by indirect position control. This leads to low positioning accuracy as well as an insufficient dynamic compliance. To meet the high accuracy requirements of modern machine tools, this paper presents an acceleration-based disturbance compensation. Experimental results prove a considerable improvement of the disturbance behavior.

Development of Flexible Worktable for Endmilling Based on Parallel Mechanism

2010 ◽  
Vol 447-448 ◽  
pp. 826-830 ◽  
Author(s):  
Tomohisa Tanaka ◽  
Masahiro Komori ◽  
Jiang Zhu ◽  
Yoshio Saito
Keyword(s):  
Machine Tools ◽  
Parallel Mechanism ◽  
High Accuracy ◽  
The Other ◽  
Geometrical Parameters ◽  
Basic Design ◽  
Positioning Accuracy ◽  
Accuracy Measurement ◽  
High Degree ◽  
Work Table

Parallel mechanism has many advantages, such as high stiffness, high accuracy, high degree of freedom (DOF), etc. These fine features are suitable for work table of machine tools for production of recent complicated designs. In this study, six axes linear-actuated parallel mechanism was chosen as the basic design for work table. First, geometrical parameters of the table were designed to satisfy the required movable range with minimum cutting load. Then, the work table was actually constructed and its performance was evaluated. From positioning accuracy measurement, it was found that the table is suitable to be used for machining of complicated products. On the other hand, from actual cutting tests of primitive shapes using chemical wood and measurement of the machined shapes, potential of the table for real cutting application was confirmed.

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