scholarly journals Analysis of Measured Workpiece's Form Errors Influence on the Accuracy of Probe Heads Used on Five-Axis Measuring Systems

2017 ◽  
Vol 11 (4) ◽  
pp. 305-310
Author(s):  
Wiktor Harmatys ◽  
Adam Gąska ◽  
Maciej Gruza ◽  
Piotr Gąska ◽  
Jerzy Sładek
Keyword(s):  
Measuring Systems ◽  
Form Errors ◽  
Five Axis

scholarly journals Assessment of the Impact of Probe Head Hysteresis on the Accuracy of Five-Axis Coordinate Measuring Systems

2017 ◽  
Vol 11 (3) ◽  
pp. 277-282
Author(s):  
Piotr Gąska ◽  
Maciej Gruza ◽  
Adam Gąska ◽  
Wiktor Harmatys ◽  
Jerzy Sładek
Keyword(s):  
Measuring Systems ◽  
Five Axis ◽  
The Impact ◽  
Probe Head

scholarly journals Selection of Optimal Path Control Algorithms for Probe Heads Used on Five-Axis Measuring Systems

2018 ◽  
Vol 8 (12) ◽  
pp. 2455 ◽  
Author(s):  
Adam Gąska ◽  
Piotr Gąska ◽  
Maciej Gruza ◽  
Jerzy Sładek
Keyword(s):  
Path Planning ◽  
Measurement Errors ◽  
Scientific Practice ◽  
Optimal Path ◽  
Measuring Systems ◽  
Factors Affecting ◽  
Path Control ◽  
Five Axis ◽  
The Impact ◽  
Selection Of

The utilization of rotational movements of a probing system during points measurementscontributes to the reduction of measurement duration and increases measurement repeatability.However, knowledge on such behavior and accuracy of probing systems is still unsatisfactory.Machines combined with articulating probing systems that have the ability of continuous indexationbecome redundant systems, which means that the same points can be measured using almost infinitemutual configurations of the machine and probe stylus orientations. Therefore, the proper selectionof inspection path planning method becomes one of the main factors affecting the accuracy of themeasurement. It is possible to assess the impact of this factor on the accuracy of the measurementby comparing the results of the measurements of gauge elements, which are done using differentpath controlling algorithms. After that, the best method for basic measuring tasks can be chosenin order to reduce measurement errors. Measurements of the multi-feature check gauge, using thedefault method for path planning and those chosen on the basis of described experiments, indicatesthat the improvement of accuracy may reach several microns. Results presented in this paper can bedirectly transferred to similar systems and measuring tasks, which are commonly met in industrialand scientific practice.

Modification of Tool Orientation and Position to Compensate Tool and Part Deflections in Five-Axis Ball End Milling Operations

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
M. Habibi ◽  
O. Tuysuz ◽  
Y. Altintas
Keyword(s):  
Cutting Force ◽  
End Milling ◽  
Traditional Approach ◽  
Cutting Speed ◽  
Computational Time ◽  
Blade Surface ◽  
Tool Orientation ◽  
Ball End Milling ◽  
Form Errors ◽  
Five Axis

Tool-workpiece deflection is one of the major error sources in machining thin walled structures like blades. The traditional approach in industry to eliminate this error is based on modifying tool positions after measuring the error on the machined part. This paper presents an integrated model of cutting force distribution on the tool–blade contact, automatic update of blade static stiffness matrix without resorting to time-consuming finite element solutions as the material is removed, the prediction and compensation of static deflection marks left on the blade surface. The main focus of the paper is to compensate the deflection errors by respecting the maximum form errors, collision of tool/machine/workpiece, cutting speed limit at the tool tip, and ball end—blade surface contact constraints. The compensation has been carried out by two modules. The first module adjusts the tool orientation along the path to reduce the error by constructing an optimization problem. This module is computationally inexpensive and results in about 70% error reduction based on the conducted experiments. The modified tool path resulted from the first module is fed to the second module for further reduction of the form errors if needed at the violated cutter locations; hence it takes less computational time than the stand alone approach proposed in the literature. The proposed algorithms have been experimentally validated on five-axis finish ball end milling of blades with about 80% reduction in cutting force induced form errors.

The new CM-Series TEMs: integration of a five-axis motorized, fully computer-controlled goniometer

1993 ◽  
Vol 51 ◽  
pp. 258-259
Author(s):  
Marc J.C. de Jong ◽  
P. Emile S.J. Asselbergs ◽  
Max T. Otten
Keyword(s):  
Mechanical Design ◽  
Computer Control ◽  
Objective Lens ◽  
Access Port ◽  
Vibration Stability ◽  
Transmission Electron ◽  
Computer Controlled ◽  
High Degree ◽  
Five Axis ◽  
Five Axes

A new step forward in Transmission Electron Microscopy has been made with the introduction of the CompuStage on the CM-series TEMs: CM120, CM200, CM200 FEG and CM300. This new goniometer has motorization on five axes (X, Y, Z, α, β), all under full computer control by a dedicated microprocessor that is in communication with the main CM processor. Positions on all five axes are read out directly - not via a system counting motor revolutions - thereby providing a high degree of accuracy. The CompuStage enters the octagonal block around the specimen through a single port, allowing the specimen stage to float freely in the vacuum between the objective-lens pole pieces, thereby improving vibration stability and freeing up one access port. Improvements in the mechanical design ensure higher stability with regard to vibration and drift. During stage movement the holder O-ring no longer slides, providing higher drift stability and positioning accuracy as well as better vacuum.

INVESTIGATION HIGH SENSITIVE PHOTO DETECTOR DEVICE BASED ON THE AVALANCHE PHOTODIODE FOR OPTOELECTRONIC MEASURING SYSTEMS

2016 ◽  
Vol 2016 (6) ◽  
pp. 69-75
Author(s):  
I.O. Bragynets ◽  
◽  
O.G. Kononenko ◽  
Yu.О. Masjurenko ◽  
◽  
...  
Keyword(s):  
Avalanche Photodiode ◽  
Measuring Systems
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