Machine tool movement control method combining the benefit of software and real-time interpolator for sculpture surface machining

2020 ◽  
Vol 234 (9) ◽  
pp. 1215-1226 ◽  
Author(s):  
Lei Lu ◽  
Jiang Han ◽  
Yulong Zhou ◽  
Shan Chen ◽  
Haijun Liu ◽  
...  
Keyword(s):  
Real Time ◽  
Machining Process ◽  
Mathematical Form ◽  
Computer Aided Manufacturing ◽  
Surface Machining ◽  
The Real ◽  
Advantages And Disadvantages ◽  
Feedrate Scheduling ◽  
Computer Aided ◽  
Manufacturing Software

In the traditional sculpture surface machining process, the G01 code is still the mainstream trajectory. Furthermore, real-time feedrate scheduling and corner smooth algorithm in controller constitute the mainstream method to improve the machining process of short line G01 code in sculpture surface machining. However, the G01 code’s discontinuity and the limits of real-time calculation capacity hinder the use of high-speed machine tools and the accuracy of the machined part. In this article, a new method for sculpture surface machining that considers the advantages and disadvantages of both the computer-aided manufacturing software and the real-time controller is presented to promote the use of a continuous curve tool path. The method mainly transfers the computing-intensive feedrate scheduling and trajectory optimization algorithm in the real-time controller to the computer-aided manufacturing software. Furthermore, the computer-aided manufacturing software generates the machining data, which contain the geometry and feedrate information of the machining process. Finally, the real-time interpolator and the mathematical form of computer-aided manufacturing–generated data are designed simultaneously. In the method, the real-time controller can be designed as simple as possible to release more computing resources to the other real-time intelligent modules. The powerful computational capacity of the software guarantees the optimality of the machining process.

Applied NURBS on the Research of Interactive Curved Hull Computer Aided Design

2013 ◽  
Vol 328 ◽  
pp. 149-153
Author(s):  
Zhi Hui Dong ◽  
Duan Feng Han ◽  
Li Hao Yuan
Keyword(s):  
Real Time ◽  
Computer Aided Design ◽  
Tree Structure ◽  
Parameter Adjustment ◽  
The Real ◽  
Geometric Data ◽  
Computer Aided ◽  
Aided Design

Based on NURBS algorithm, this paper processes and renders curved hull in OpenGL platform, and applies Tree-Structure to manage all the real-time geometric data. And what is more, extend the functions into curved ratio check, the model's parameter adjustment and output etc. At last, results of instances will be given to illuminate the effects.

scholarly journals Incorporating Real-time Influenza Detection Into the Test-negative Design for Estimating Influenza Vaccine Effectiveness: The Real-time Test-negative Design (rtTND)

2020 ◽  
Author(s):  
Leora R Feldstein ◽  
Wesley H Self ◽  
Jill M Ferdinands ◽  
Adrienne G Randolph ◽  
Michael Aboodi ◽  
...  
Keyword(s):  
Influenza Vaccine ◽  
Real Time ◽  
Negative Control ◽  
Vaccine Effectiveness ◽  
Eligibility Criteria ◽  
The Real ◽  
Advantages And Disadvantages ◽  
Time Test ◽  
Study Sites ◽  
Negative Controls

Abstract With rapid and accurate molecular influenza testing now widely available in clinical settings, influenza vaccine effectiveness (VE) studies can prospectively select participants for enrollment based on real-time results rather than enrolling all eligible patients regardless of influenza status, as in the traditional test-negative design (TND). Thus, we explore advantages and disadvantages of modifying the TND for estimating VE by using real-time, clinically available viral testing results paired with acute respiratory infection eligibility criteria for identifying influenza cases and test-negative controls prior to enrollment. This modification, which we have called the real-time test-negative design (rtTND), has the potential to improve influenza VE studies by optimizing the case-to-test-negative control ratio, more accurately classifying influenza status, improving study efficiency, reducing study cost, and increasing study power to adequately estimate VE. Important considerations for limiting biases in the rtTND include the need for comprehensive clinical influenza testing at study sites and accurate influenza tests.

Programming CNC Machines Using Computer-Aided Manufacturing Software

2013 ◽  
Vol 19 (2) ◽  
pp. 369-373 ◽  
Author(s):  
Peter Michalik ◽  
Jozef Zajac ◽  
Michal Hatala
Keyword(s):  
Computer Aided Manufacturing ◽  
Cnc Machines ◽  
Computer Aided ◽  
Manufacturing Software

SPC-Based Real-Time Control Method for CNC Machining Quality

2010 ◽  
Vol 42 ◽  
pp. 263-267
Author(s):  
Xin Long Kang ◽  
Dong Man Yu ◽  
Xue Ling Yang ◽  
Di Wang
Keyword(s):  
Real Time ◽  
High Precision ◽  
Control Method ◽  
Cnc Machining ◽  
Machining Process ◽  
Real Time Control ◽  
The Real ◽  
Machining Quality ◽  
Time Control ◽  
Process System

This paper presents the methods and applications for the real-time control of CNC machining process quality in detail and clarifies the objectives of SPC for CNC machining, in order to enhance the understanding of the factors that cause instability to process system. Also, this paper adopts the methods and procedures for SPC to effectively serve the production of high-precision products for enterprises, in order to meet customers’ requirements and expectations.

Computer-Aided Manufacturing (CAM) Software Development for Laser Machining

2013 ◽  
Author(s):  
Abdolreza Bayesteh ◽  
Farid Ahmad ◽  
Martin B. G. Jun
Keyword(s):  
Laser Ablation ◽  
Tool Path ◽  
Laser Energy ◽  
Machining Process ◽  
Work Piece ◽  
Software System ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Tool Trajectory ◽  
Cam Software

A novel computer-aided manufacturing (CAM) software system is proposed for laser ablation machining process. The algorithms and prototype software system is designed to offer efficient optimization of tool path for controlled delivery of laser energy into work-piece. The software simplifies part program creation and maintains constant velocity of the sample stage for each segment of a complex tool trajectory. These features enable efficient deposition of laser energy into the work piece and therefore, reduction in heat-affected zone is expected in laser ablation based micromachining. The reported software provides fast modification of tool path, automatic and efficient sequencing of path elements in a complicated tool trajectory, location of reference point and automatic fixing of geometrical errors in imported drawing exchange files (DXF) or DWG format files.

Isothermal Target and Probe Amplification Assay for the Real-Time Rapid Detection of Staphylococcus aureus

2015 ◽  
Vol 78 (4) ◽  
pp. 723-727 ◽  
Author(s):  
HYEWON SHIN ◽  
MINHWAN KIM ◽  
EUNJU YOON ◽  
GYOUNGWON KANG ◽  
SEUNGYU KIM ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Real Time ◽  
Rapid Detection ◽  
Food Poisoning ◽  
Detection Methods ◽  
Economic Losses ◽  
Fluorescence Detector ◽  
The Real ◽  
Robust Detection ◽  
Advantages And Disadvantages

Staphylococcus aureus, the species most commonly associated with staphylococcal food poisoning, is one of the most prevalent causes of foodborne disease in Korea and other parts of the world, with much damage inflicted to the health of individuals and economic losses estimated at $120 million. To reduce food poisoning outbreaks by implementing prevention methods, rapid detection of S. aureus in foods is essential. Various types of detection methods for S. aureus are available. Although each method has advantages and disadvantages, high levels of sensitivity and specificity are key aspects of a robust detection method. Here, we describe a novel real-time isothermal target and probe amplification (iTPA) method that allows the rapid and simultaneous amplification of target DNA (the S. aureus nuc gene) and a fluorescence resonance energy transfer–based signal probe under isothermal conditions at 61°C or detection of S. aureus in real time. The assay was able to specifically detect all 91 S. aureus strains tested without nonspecific detection of 51 non–S. aureus strains. The real-time iTPA assay detected S. aureus at an initial level of 101 CFU in overnight cultures of preenriched food samples (kiwi dressing, soybean milk, and custard cream). The advantage of this detection system is that it does not require a thermal cycler, reducing the cost of the real-time PCR and its footprint. Combined with a miniaturized fluorescence detector, this system can be developed into a simplified quantitative hand-held real-time device, which is often required. The iTPA assay was highly reliable and therefore may be used as a rapid and sensitive means of identifying S. aureus in foods.

scholarly journals Direct Digitalization Devices in Today’s Dental Practice: Lab Scanners

2021 ◽  
Vol 38 (SI-2) ◽  
pp. 143-147
Author(s):  
Çağrı URAL ◽  
Necati KALELİ
Keyword(s):  
Clinical Practice ◽  
Computer Aided Design ◽  
New Technologies ◽  
The Other ◽  
Dental Practice ◽  
Computer Aided Manufacturing ◽  
Digital Workflow ◽  
Advantages And Disadvantages ◽  
Computer Aided ◽  
Aided Design

Every day, modern dentistry faces with new technologies, which have begun to be used in daily clinical practice, and computer-aided design and computer-aided manufacturing has brought new technologies and opportunities to all fields of dentistry. The first step is acquiring the true data, which belongs to the patients, digitalization of intraoral structures. By acquiring these data, the restorations can be designed and fabricated by using digital workflow. Dentists have two main options for capturing the data from the related surfaces; one is the direct digitalization and the other one is the indirect digitalization process. In the indirect process, extraoral scanners, which are called lab scanners or cast scanners, are used. Every system has different advantages and disadvantages, and the clinicians or dental technicians should know the technology and different features of these devices to choose the optimal device for their workflow.

Laser-Chemical 3-D Micromachining

1992 ◽  
Vol 282 ◽  
Author(s):  
T. M. Bloomstein ◽  
D. J. Ehrlich
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Solid Modeling ◽  
Compression Molding ◽  
Removal Rates ◽  
Computer Aided Manufacturing ◽  
Electrodischarge Machining ◽  
Computer Aided ◽  
Manufacturing Software ◽  
Aided Design

ABSTRACTThree-dimensional parts are machined in silicon using laser-induced chlorine etching reactions. Structures are created directly from solid-modeling computer-aided-design/computer-aided-manufacturing software. Removal rates exceeding 2×104 and 105μm3/s, several orders of magnitude faster than electrodischarge machining methods, are achieved at 1-μm, and 15-μm x-y resolution, respectively. Laser-induced metallization of resulting structures as well as replication through compression molding have been demonstrated.

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