Braille is a writing system that uses tactile dots in a predetermined order which, in relation to each other, represent different letters in the alphabet. This writing system makes it possible for people with visual impairments to take part of the written media. But the availability of home based braille printers is limited and these printers are often expensive. The purpose of this project is to investigate if it is possible to build a home based braille printer for a low cost using microcontrollers, and thereby making it more accessible to people with visual impairment. In order to achieve this, a prototype was built using an microcontroller together with stepper motors and a solenoid. These components were then controlled by code through user input and translated to required movements. Each switch case then calls a set of functions that activates the steppers and the solenoid in the order needed to get the desired character. In the time frame given, the project resulted in a prototype able to print out the input it was given. As for the cost of building your own Braille printer in comparison to buying one on the market highly depends on what processing machines are accessible. / Braille är ett skrivsystem som använder taktila prickar i en förbestämd ordning i förhållande till varandra som representerar olika bokstäver i alfabetet. Detta skrivssystem gör det möjligt för personer med nedsatt syn att ta del av de skriftliga medierna. Men tillgången av hembaserade braille-skrivare är begränsad och dessa skrivare är ofta dyra. Syftet med detta projekt är att undersöka om det är möjligt att bygga en hembaserad braille-skrivare till en låg kostnad med hjälp av mikrokontroller och därmed underlätta för personer med nedsatt syn. För att uppnå detta byggdes en prototyp med en mikrokontroll tillsammans med stegmotorer och en solenoid. För att styra dessa komponenter skrevs en kod som tar in information från vad som skrivits i Arduinos serial monitor och kopplar sedan detta till specifika switch cases. Varje switch case anropar sedan en uppsättning funktioner som aktiverar stegmotorerna och solenoiden i den ordning som behövs för att få önskad bokstav. Med den givna tidsramen resulterade projektet i en prototyp som kunde skriva ut det input den var given. Vad det gäller kostnaden för att bygga en Braille-skrivare på egen hand jämfört med att köpa en på marknaden beror mycket på vilka bearbetningsmaskiner som är tillgängliga.

No description available.

Made available in DSpace on 2016-08-10T10:47:44Z (GMT). No. of bitstreams: 1 BRUNA CASTANHEIRA DE FREITAS.pdf: 3686133 bytes, checksum: 0e11fb62e9737a140ce2a4ce454e6ec9 (MD5) Previous issue date: 2016-02-23 / This paper aims to map how 3D printing is already affecting and will affect intellectual property. In Chapter 1, we trace the historical development of intellectual property as well as the philosophical justifications for this related to the development of technologies that work with content (music and movies) such as the internet. Therefore, we make analogies with this case in order to capture insights that can guide the analysis regarding the relation intellectual property and 3D printer . Chapter 2 lends itself to analyze the 3D printer and its development in the market; there are also reflections on the Maker Movement, Open Source Hardware licenses and the environmental effects of this technology. Chapter 3 analyzes cases that have already occurred involving 3D printers and intellectual property, analyzing how this technology further enhances the problem of the performance of intellectual property in the XXI century. / O presente trabalho objetiva mapear de que forma a impressão 3D já afeta e afetará a propriedade intelectual. No Capítulo 1, traça-se o desenvolvimento histórico da propriedade intelectual, bem como as justificativas filosóficas para esta em face do desenvolvimento de tecnologias que trabalham com conteúdos (músicas e filmes) como a interent. São feitas assim analogias com este caso de forma a capturar insights que possam nortear análises a respeito da relação propriedade intelectual e impressora 3D . O Capítulo 2 se presta a analisar a impressora 3D e o seu desenvolvimento no mercado; há também reflexões a respeito do Movimento Maker, licenças Open Source Hardware e os efeitos ambientais desta tecnologia. O Capítulo 3 analisa casos que já ocorreram envolvendo a impressora 3D e propriedade intelectual, analisando-se de que forma esta tecnologia problematiza ainda mais o desempenho da propriedade intelectual no século XXI.

The aim of this diploma thesis is to identify, propound, create and verify own educational models and aids usable for teaching physics. Models and aids are selected according to the Framework Educational Program for the second grade of elementary school. Models already created are verified and described, alternatively modified.

Stereolithography printing is one of the most popular 3D printing technologies. This printers use a UV light source for photopolymer curing and can be used for a wide range of applications with high precision and excellent print quality. Commercially available printers do not allow the modifications of the optical and mechanical parameters of the instrument. For this reason, a DLP printer has been designed to allow the optical system modifications and thus changing the printing field and resolution. Another advantage is the possibility to modify already designed mechanical parts. The DLP printer has been designed and tested. The recommended printer parameters settings are listed, which are based on the performed experiments.

This thesis deals with color correction of a chain that starts with the 3D Artec MHT scanner, and ends with the 3D printers (CJP – Color Jet Printing technology). In principle, it is necessary to control the color interpretation of the entire chain from the scanning of real models to the 3D print model. With color properties and their color shade, including color textures. The principle of model surface scanning using a 3D scanner is in the same principle as photo camera which scans using a conventional CMOS chip. For this reason, color palettes were scanned using the photo camera and the resulting digital data were analyzed by the Darktable software. This analysis consisted of comparing the scanned color shades of the surface with the spectrofotometer measured data. The main goal of this method was to achieve color precision in the digital data during their acquirement, adjustment and interpretation. Then the same principle was applied to the data acquired by the 3D scanner to create an ICC profile of the 3D scanner. Because the 3D printer (CJP – Color Jet Printing) uses the same principle as the 2D printer, the 2D printing device calibration principle was used again to calibrate it. There have been defined procedures that adjust the color shade to the spectrophotometrically correct shades of the resulting print on a 3D printer. Color swatches were also printed for print quality verification. It has been found that with photo camera, which was used for objective measurement in the L*a*b* coordinates of independent space, any color setting and their adjustment is very sensitive to even small imprecisions. It has been found that it is not easy to obtain accurate colors within the Detla E

The content of the thesis is the modeling and implementation of the CNC control algorithm. This master thesis contains the description of issues of computer-controlled machines, the research of interpolation algorithms for control CNC machines and the modeling of the selected control algorithm with motor S-curve shaped speed profiles and simulation of chosen algorithms with S-shaped speed profiles in Matlab & Simulink.

This thesis deals with mechanical design of FDM 3D printer with a built-in material feeder with monitoring of remaining material. The aim of this thesis is designing the FDM 3D printer with minimum print volume of 200x200x200 mm and with usage of measured data for optimising the 3D printing process. This 3D printer is targeted to the non-experienced users, so the emphasis was on ease of use and reliability of the printer. Despite the fact that it is an innovative design solution, the suitability of the design was verified experimentally as part of this thesis. The choice of the material feeder design, which is essential for the presented thesis, was justified by the realization of prototypes of two suitable designs, from which the optimal solution was chosen. The knowledge obtained from testing the prototypes was then used for the final design of 3D printer. The usage of data for optimization of the printing process is realized by a C++ compatible source code that is a part of this thesis.

The aim of the work is to design and manufacture a mechanism for setting up and clamping the replaceable head of a 3D FDM printer. The first part of the thesis deals with 3D printing in general, the second part describes the FDM method. Part three is devoted to the selection and construction of a suitable 3D printer, the fourth part to the actual design of the head attachment. In the fifth part, a technical and economic evaluation is carried out.

The goal of this thesis is to design a 3D printer type delta. To describe 3D printing technologies used by this printer, basic printer features and commercially available material used at the print and its comparison. To define all hardware components, which are necessary for construction of the 3D printer type delta. To create a proposal and construct an expansion board to which all hardware components of the printer will be connected. To optimize the print space heating and cooling of the printout. To extend the 3D printer with a Web server, which will ensure the network printing possibility.