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Evaluation of washing effect on material properties after 3D DLP printing
Uvíra, Dominik ; Jaroš, Aleš (referee) ; Zemčík, Oskar (advisor)
This thesis focuses on the influence of washing on the mechanical properties of 3D DLP printed parts. The aim of the thesis was to experimentally determine the impact of washing agents with different wash durations on the mechanical properties of 3D printed parts using DLP technology. The research describes the devices and materials used. Furthermore, an analysis of washing 3D DLP printed parts is conducted, including a description of polymer dissolution, types of washing agents, and washing methods. Based on the research, materials were selected, including Standard resin, ABS-like resin, and Tough resin. The used washing agents are IPA, Simple Green industrial degreaser, DPM, and a special uncured resin remover called EasyClean. Samples were produced on the DLP 3D printer Anycubic Photon D2, and printing profiles were established based on the research part and own calibration. In the first experiment, the effectiveness of the agents in removing uncured resin was monitored. This was followed by an experimental evaluation of the tensile properties of the prepared samples. Furthermore, the notch toughness of each material was evaluated. In both cases, an analysis of fracture surfaces was conducted. Based on the achieved results, optimal washing durations were determined for all material and rinsing agent combinations, and areas of application were recommended. Subsequently, a custom rinsing agent combining low cost and good mechanical properties was proposed. The final part of the work consists of an economic evaluation of the various rinsing agents, resulting in specific recommendations for purchasing rinsing agents and rinsing duration.
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The design of a quadrocopter for food delivery
Gryc, Matěj ; Čípek, Pavel (referee) ; Skurka, Šimon (advisor)
Online delivery of hot food to the customer's home has become standard. However, as a result of the covid-19 pandemic, methods of safe delivery that do not require interpersonal contact are now being sought. The use of drones, which are already being used in some countries to transport goods and materials, seems promising. This bachelor thesis deals with the design and assembly of a quadcopter designed for food delivery. First, the frame was designed, which was largely fabricated using 3D printing. Based on calculations, the electronics including batteries and motors were selected. Then the mechanism by which the food transport will be mediated was designed. Once constructed, the functionality of the quadcopter and delivery mechanism was tested. Finally, the design was evaluated and possible improvements were mentioned.
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Control of appliances by Raspberry Pi
Panský, Michal ; Petyovský, Petr (referee) ; Macho, Tomáš (advisor)
This thesis deals with the design of hardware and software solutions for controlling household appliances using Raspberry Pi. The software part utilizes modern frameworks for creating web and mobile applications such as Svelte and SvelteNative, as well as programming languages like Typescript, Svelte, Python, and NativeScript. The thesis also describes the design and implementation of both the hardware and software parts, followed by the setup and execution of the entire program and the results of testing.
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Social nets
Matušek, Jakub ; Gajdošík, Andreas (referee) ; Gabriel, Michal (advisor)
In his work, Jakub Matušek devotes himself to the rendering of invisible information connected between people. Using 3D printing, he creates a "network" composed of a large number of figures. And that network not only as a figurative name, but as a fabric in which something can be wrapped, covered, or something can be captured or filtered with its help. By the term information network, the author understands both a network formed by digital media, even social networks, but also a network formed by interpersonal relationships. He perceives it as gray matter.
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The gas level measuring device with a capillary made by 3-D printing
Halva, Ondřej ; Búran, Martin (referee) ; Adámek, Martin (advisor)
This thesis is concerned with the experimental design, manufacture, and testing of a 3D printed prototype of a capillary. The aim is to introduce the reader to the issue of 3D printing related to the manufacture of capillaries and focus on chemiresist sensors. Furthermore, the features of microcontroller Atmel Atmega2560 and its applications in sensory technology will be described. In the second part of the thesis, the capillary for sample pre-processing with an output to a gas measuring device with an electrochemical sensor is designed and produced. For the control of the device, the Atmel Atmega 2560 microcontroller is to be used and the device must enable data transfer to PC. The possible applications of the capillary are to be evaluated.
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3D Printer Remake
Čtvrtníček, Jan ; Husák, Michal (referee) ; Arm, Jakub (advisor)
Purpose of this thesis is revitalize an existing 3D printer. It briefly summarizes the possible technologies of 3D printers with a focus on FDM technology and elaborates in more depth the possibilities of X and Y axis movement. Above all, this thesis is dedicated to the design of a 3D printer model according to selected technologies so that it meets the required parameters. Subsequent implementation is based on the precise selection of mechanical and electrical components. It also deals with the implementation of the Klipper utility software on the OctoPrint interface. The entire printer is designed as an enclosable cell with automatic print unloading.
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Biodegradation of 3D printed composites based on poly(3-hydroxybutyrate)
Gazdová, Nikol ; Menčík, Přemysl (referee) ; Melčová, Veronika (advisor)
This bachelor thesis deals with the biodegradation of 3D printed bodies composed of poly(3- hyroxybutyrate), polylactic acid, bioceramics and plasticizer. These components were selected for their biocompatibility and properties that could be used in tissue engineering as a temporary, absorbable bone tissue replacement. The main objective was to investigate the effect of the individual constituent bodies on the biodegradation itself. Biodegradation was carried out at 37 °C in a solution simulating the ionic concentration of blood plasma. Samples were sequentially withdrawn at monthly intervals for five months. To evaluate the results, 2 methods were used, weight change and compression test, where the strength of each body was evaluated. From the evaluation of the data it was not possible to reach a uniform result on which substance influences biodegradation the most, because it always depended on the ratio of the other substances. To investigate the effect of poly(3-hydroxybutyrate) and polylactic acid on the rate of biodegradation, mixtures of RP9, RP10 and RP15 were compared. It showed that a higher polylactic acid and lower poly(3-hydroxybutyrate) content had a significant positive effect on the biodegradation rate, as the difference between the weight loss for the RP9 blend with the highest poly(3-hydroxybutyrate) content and the RP10 blend with the highest polylactic acid content was 8.37% for solid bodies and 4.13% for porous bodies. For strength, the difference was 73.32% and 73.65% for the solid and porous bodies, respectively. Observing the effect of bioceramic content on the RP11, RP12 and RP15 mixtures, we concluded that this effect was almost negligible on the biodegradation rate The difference in weight loss between the RP11 mixture with the lowest bioceramic content and the RP12 mixture with the highest bioceramic content was only 1, 68 % for solid bodies and 0.99 % for porous bodies, while mixture RP15 showed the highest biodegradation rate despite having a medium value of bioceramics in the mixture. For the mechanical properties, this then amounts to a difference of 10.4% for the solids and 7.57% for the porous bodies. When comparing the effect of plasticizer for mixes RP13, RP14 and RP15, the effect was more on the strength drop, where the difference in strength drop for mix RP13 with the lowest plasticizer content and RP14 with the highest plasticizer content was different by 20.3% and 18.16% for the solid and porous body, respectively. The decrease in weight was then different by 4.1 % and 0.83 % for the solid and porous body, respectively. Finally, bioceramics from different companies emerged as an important element for the biodegradation rate. Hydroxyapatite from Applichem was the best biodegraded and hydroxyapatite from CN Lab was the worst. The difference for weight loss was 17.35% for the solid and 5.93% for the porous body. The strength loss was then different by 55.6% for the solid body and 33.38% for the porous body.
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Experiment kit for the law of force
CÍSAŘ, Aleš
This master's thesis deals with the development and implementation of an affordable trolley set intended for the demonstration of Newton's second law in the framework of teaching physics in primary and secondary schools. The aim of the work was to design, manufacture and test an educational tool that would not only be effective and pedagogically beneficial, but also available to a wide range of educational institutions thanks to the use of modern production technologies such as 3D printing. In the theoretical part of the thesis, a review of current pedagogical approaches to teaching physics and identification of key requirements for educational tools focused on physics experiments was carried out. The practical part is dedicated to a specific design and prototyping of the wheelchair set, including the development of associated worksheets and methodological materials for students and teachers. The pilot testing of the educational benefit of the wheelchair set was carried out in different classrooms, where the reactions of students and teachers were monitored and feedback was obtained for further improvement. The results of the testing showed that the wheelchair set significantly improves the understanding of Newton's second law among students and increases their motivation to actively participate in the learning process. This thesis provides a detailed overview of the development, application and testing research of the innovative teaching tool and its significant benefits for teaching physics. The potential of integrating modern production technologies into the development of educational materials and their influence on making quality and interactive education in the natural sciences more accessible is emphasized.
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Catheter-based left atrial appendage closure
Hozman, Marek ; Osmančík, Pavel (advisor) ; Bulava, Alan (referee) ; Havránek, Štěpán (referee)
Transseptal puncture in left atrial appendage closure guided by 3D printing and multiplanar CT reconstruction Abstract Introduction: The presented study investigates the application of bi-atrial 3D printed models to guide transseptal puncture (TSP) in left atrial appendage occlusion (LAAC). The objectives are to (1) test the feasibility of 3D printing (3DP) for TSP guidance, (2) analyse the distribution of the optimal TSP locations, and (3) define a CT-derived 2D parameter suitable for predicting the optimal TSP locations. Methods: Pre-procedural planning included multiplanar CT reconstruction, 3D segmentation, and 3DP. TSP was pre-procedurally simulated in vitro at six defined sites. Based on the position of the sheath, TSP sites were classified as optimal, sub-optimal, or non-optimal. The aim was to target the TSP in the recommended position during the procedure. Procedure progress was assessed post hoc by the operator. Results: Of 68 screened patients, 60 patients in five centres (mean age of 74.68 ± 7.64 years, 71.66% males) were prospectively analysed (3DP failed in one case, and seven patients did not finally undergo the procedure). In 55 patients (91.66%), TSP was performed in the optimal location as recommended by the 3DP. The optimal locations for TSP were postero-inferior in 45.3%, mid-inferior in...
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