ultra-precision
Approaches for Detailed Modelling of Ultra Precision Positioning Systems
... Ultra-precision machining is a key technology for the manufacturing of optical components with a surface roughness under 20 nm and form deviations under 1 µm [1]. These high accuracy requirements restrict ...
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Microstructural Changes at the Ultra Precision Raster Milled Surface of Zn Al Based Alloy
... a ultra-precision raster milled Zn-Al based alloy were studied using optical microscopy, back-scattered electron microscopy and X-ray diffraction ...after ultra-precision raster milling with ...
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Design and analysis of aerostatic spindle with high load characteristics for large ultra-precision drum lathe
... stiffness have restricted their permissible application, especially in large ultra-precision drum lathe. This is because excessive gas supply pressure will result in a supersonic zone, which can lead to a ...
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An integrated system for ultra-precision machine tool design in conceptual and fundamental design stage
... Abstract: This paper presents an integrated system used for ultra precision machine tool (UPMT) design in conceptual and fundamental design stage. This system is based on the dynamics, thermodynamics and ...
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Subsurface damages beneath fracture pits of reaction-bonded silicon carbide after ultra-precision grinding
... In this paper, the subsurface damage underneath the brittle fracture area induced by grinding were investigated through transmission electron microscopy (TEM) observation. The original subsurface structure of RB-SiC ...
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Eccentricity Estimation in Ultra-Precision Rotating Devices Based on a Neuro-Fuzzy Model
... 3. Experimental Analysis. An experimental platform was installed on a Precitech Inc. SP-150 spindle, mounted on an ultra-precision lathe, in order to conduct an experimental study of the relationship ...
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Ultra-Precision Machining of a Large Amplitude Sinusoidal Ring Surface Based on a Slow Tool Servo
... A sinusoidal ring surface expressed by Eq. (1) with h = 0.4 mm, a = 2 mm and D = 20 mm was simulated and fabricated in the Nanoform250 ultra-precision machining system. Both the X and Z axes of the ...
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Experimental investigation on the surface and subsurface damages characteristics and formation mechanisms in ultra-precision grinding of SiC
... paper, ultra- precision grinding experiments were performed on reaction- bonded silicon carbide (RB-SiC) ceramics to investigate sur- face and subsurface damages characteristics and formation mechanisms in ...
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Dynamic Accuracy Design Method of Ultra-precision Machine Tool
... of ultra‑precision machine tool is proposed in this paper, which is based on the frequency domain error ...the ultra‑precision flycutting machine tool for KDP crystal machining is described to ...
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A Minimax Fitting Algorithm for Ultra Precision Aspheric Surfaces
... University of Huddersfield Repository Zhang, Xiangchao, Jiang, Xiang and Scott, Paul J A Minimax Fitting Algorithm for UltraPrecision Aspheric Surfaces Original Citation Zhang, Xiangchao, Jiang, Xian[.] ...
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Error Analysis of Radial Motion Measurement of Ultra Precision Spindle
... in ultra-precision machine ...of ultra-precision machine tool ...for ultra-precision axis because of artifact form er- ...
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The status of the development of Precision and ultra-precision machine tool and key technology
... of ultra-precision machine which can ensure ...rotary precision spindle, turn smooth, vibration-free, and the key is precise ...the ultra-precision machine tool, and most using ...
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Hybrid Incremental Model for Imbalance Detection in Ultra-high Precision Rotating Devices
... balance ultra- precision rotation devices are usually based on determining the position and magnitude of the imbalance masses, and then adding compensatory masses to the rotor (of the same magnitude, and ...
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Hybrid modelling and simulation of a computer numerical control machine tool feed drive
... 1 Hybrid modelling and simulation of a computer numerical control machine tool feed drive C Pislaru*, D G Ford and G Holroyd Ultra Precision Engineering Centre, University of Huddersfield, UK Abstract[.] ...
10
Design and Development of Stepper Motor Based XY Scanning Stage
... state-of-the-art ultra-precision XY stages have a stage motion mechanism composed of air-bearing or roller-bearing supported linear slides, which are driven by linear ...
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The Relevance of Accuracy for the Impact of Macroeconomic News on Volatility
... the precision of a news announcement is based on informa- tion available when the announcement is ...overall precision of a macro indicator, as discussed ...
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RP HPLC METHOD DEVELOPMENT AND VALIDATION OF CAPECITABINE EXTENDED RELEASE TABLET DOSAGE FORM
... Results: The system suitability criteria were found to meet the pre-established acceptance criteria as per the analytical method. (Refer to Table 9 for system suitability results). The results of assay obtained from six ...
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UV Spectrophotometric Method for Simultaneous Estimation of Glycopyrrolate and Formoterol Fumarate in Their Synthetic Mixture by Absorbance Correction Method
... A simple, precise, accurate and validated UV-spectroscopic method absorbance correction menthod for simultaneous estimation of Glycopyrrolate and Formoterol Fumarate in their synthetic mixture was developed. The ...
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Simultaneous Determination of Hydrophilic and Lipophilic Drugs in Anti-Cancer Liposomes: Absorptivity Method
... The absorbance of three different dilutions of stock mixture solution was measured daily for three consecutive days to calculate % RSD values (Table 3) and calculate inter-day variations. Results of precision ...
9
Progress towards a high precision measurement of the neutron spin--electron angular correlation in polarized neutron beta decay with ultra-cold neutrons
... The plastic scintillator is chosen to have high average light yield in the 400–430 nm wavelength region, which matches bi-alkali photocathode sensitivity (a bi-alkali photocathode is chosen for light- electron conversion ...
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