National Repository of Grey Literature 17 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Milling machine
Homola, Stanislav ; Vetiška, Jan (referee) ; Marada, Tomáš (advisor)
This goal of the diploma thesis is to design, to construct and write control program for CNC milling machine designed for machining aluminum, wood and plastic. Entire structure of machine is designed and made of steel. The main table consists of an aluminum plate and aluminum structural profiles. Spindle of milling machine is a high speed motor from ATAS a.s. company. Milling machine is controlled by the program made in TwinCAT environment from Beckhoff Automation GmbH & Co. KG.
Spline interpolation in CNC milling
Soukupová, Veronika ; Píška, Miroslav (referee) ; Ohnišťová, Petra (advisor)
Tato práce se zaměřuje na využití různých typů splinové interpolace pro obrábění na číslicově řízených strojích. Cílem této práce je teoreticky popsat využití splinových interpolací při CNC frézování a následně stanovit a zhodnotit limity využití různých typů splinových interpolací na základně daného objemu vstupních dat. Součástí práce je vytvoření programu pro generaci různého počtu uzlových bodů na analyticky známé křivce. Následuje vložení uzlových bodů do vytvořeného CNC programu pětiosého obráběcího centra a poté jeho verifikace. Pro stejné uzlové body jsou aplikovány různé druhy interpolace pro následné porovnání metod a stanovení minimálního počtu bodů na délku křivky pro dosažené vyhovující přesnosti při použití dané interpolační metody.
Watermarking as Document Protection
Segedy, Patrik ; Kočí, Radek (referee) ; Hanáček, Petr (advisor)
This thesis is dealing with document protection using a digital watermarking. First, a watermark characteristics are presented. Then, different usages of the watermarking are discussed. Next part of the thesis is dedicated to current development in watermarking field. It is aimed at various principles of watermark embedding into different multimedia types. Subsequently, a watermarking scheme for still images is proposed and implemented. Finally, the watermarking scheme undergoes attacks, which should damage embedded watermark. Attacked watermark is then extracted and compared to the embedded watermark.
Design and implementation of improved measuring device for inductive sensors testing in temperature chamber
Šimůnek, Patrik ; Dřínovský, Jiří (referee) ; Šotner, Roman (advisor)
This thesis deals with the analysis of the measuring equipment for the testing of inductive sensors in the climatic chamber, which mainly highlights the faults and deficiencies of this device. Based on this analysis, a new measurement system is designed to eliminate these or all the deficiencies. Several new useful features are added to the new design of the measuring system.
NC control system on Beckhoff platform
Jelínek, Pavel ; Bradáč, František (referee) ; Vetiška, Jan (advisor)
This thesis deals with a creation of a control system of 3-axis milling machine. The beginning of the thesis is dedicated to the general description of the problematic of the numerically controlled machines and the technologies used in this branch. The next chapter describes mechanical and electronical adjustments of the machine. Following chapters are dedicated to the creation of PLC program and HMI using the TwinCAT software. In conclusion, this thesis deals with commissioning of the machine, measuring its geometrical accuracy and testing.
3D engraving milling machine
Bosák, Daniel ; Vetiška, Jan (referee) ; Bradáč, František (advisor)
This thesis deals with rebuilding of a laboratory manipulator to 3D engraving machine. First part of the thesis describes the engraving technology and lists the most common types of engraving machines. Next, the initial state of the machine is analysed and modifications of mechanical and electrical equipment are suggested. Design, realisation of a control system and human machine interface are described. The Beckhoff TwinCAT programming environment is used. The last part of the thesis deals with practical realisation and commissioning of the machine. The results of the thesis can be used as an addition for lessons of Automation of Production Machines.
Application CAD/CAM software PowerMILL for machining
Spáčil, Petr ; Sedlák, Josef (referee) ; Polzer, Aleš (advisor)
roject own model of workpiece. Choose competent machine tools for machining. Strategy analysis of machining in software PowerMILL. NC programs processing for given application. Experimental verification of NC programs with system Sinumerik 840D.
Design and implementation of improved measuring device for inductive sensors testing in temperature chamber
Šimůnek, Patrik ; Dřínovský, Jiří (referee) ; Šotner, Roman (advisor)
This thesis deals with the analysis of the measuring equipment for the testing of inductive sensors in the climatic chamber, which mainly highlights the faults and deficiencies of this device. Based on this analysis, a new measurement system is designed to eliminate these or all the deficiencies. Several new useful features are added to the new design of the measuring system.
Effects of the Interferon regulatory factor 3 on immune responses to vaccinia virus in the atopic organism
Pilná, Hana ; Mělková, Zora (advisor) ; Drbal, Karel (referee)
Vaccinia virus (VACV) is an enveloped DNA virus, member of the Orthopoxviridae genus. VACV genome size is about 200 kbp. This huge genome capacity allows VACV to encode a set of factors that are non-essential for virus replication and spread in vitro. While these factors are needed for interfering with host immune responses, VACV remains strongly immunogenic. Cell-mediated and humoral immune responses in atopic disorders are deregulated to a certain extent, leading to complications in case of infection or vaccination with vaccines based on replicating viruses, such as eczema vaccinatum caused by VACV. VACV effects on immune responses consist among others in the inhibition of expression of type I interferon (IFN) at various levels - for example in a specific inhibition of phosphorylation of the interferon regulatory factor-3 (IRF-3) via inhibition of the activity of TANK-binding kinase 1 (TBK 1) that normally phosphorylates IRF-3. Phosphorylation allows IRF-3 to translocate into the nucleus where it initiates transcription of IFNβ followed by induction of expression of IFN and interferon stimulated genes. Expression of these genes is shut down when IRF-3 activity is inhibited. To overcome this block, a recombinant VACV expressing murine IRF-3 under VACV p7.5 promotor (WR-IRF3) was generated....
Spline interpolation in CNC milling
Soukupová, Veronika ; Píška, Miroslav (referee) ; Ohnišťová, Petra (advisor)
Tato práce se zaměřuje na využití různých typů splinové interpolace pro obrábění na číslicově řízených strojích. Cílem této práce je teoreticky popsat využití splinových interpolací při CNC frézování a následně stanovit a zhodnotit limity využití různých typů splinových interpolací na základně daného objemu vstupních dat. Součástí práce je vytvoření programu pro generaci různého počtu uzlových bodů na analyticky známé křivce. Následuje vložení uzlových bodů do vytvořeného CNC programu pětiosého obráběcího centra a poté jeho verifikace. Pro stejné uzlové body jsou aplikovány různé druhy interpolace pro následné porovnání metod a stanovení minimálního počtu bodů na délku křivky pro dosažené vyhovující přesnosti při použití dané interpolační metody.

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