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Modernization of Tenryu Pick and Place Machine
Drška, Jan ; Szabó, Zoltán (referee) ; Mikulka, Jan (advisor)
The aim of the diploma thesis is to evaluate the current state of the machine and to propose a possible solution for the modernization of the machine and to implement selected parts. The thesis includes documentation of the original state of the Tenryu MT-5530LQ automatic machine and its documentation after modernization. In the introductory part, the theory of the automatic machine is described, this chapter is followed by a description of the function and design of the aforementioned machine. The third chapter describes and identifies the machine components that need to be replaced or repaired. The fourth chapter of this thesis contains a complete proposal for the modernization of the machine, including the possible results of the modernization. These previous chapters are followed by chapters 5, 6 and 7 where new cards for the proposed control system are described and the thesis concludes with a summary of the impact of the upgrade on the machine including options for continuing to upgrade the machine.
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Automatic measurement of LED spectrum
Žabka, Jindřich ; Hudcová, Lucie (referee) ; Skryja, Petr (advisor)
Teoretical part of the thesis is introducing light sources. Here are examinated the principles of light generation in these light sources, basic radiometry and photometry variables, according to which are these sources sorted and their operating parameters. The parameters describing quality of light sources are also mentioned here. Next part examinates LEDs, theirs usual construction types and most common SMD LED packages. Part about optical spectroscopy describes usually used components for optical measurement. Practical part narrates appropriate organization of workplace, LabVIEW platform, communication process with instruments and a guide describing measure process. There is a solved laboratory protocol as an attachement.
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Automatic measurement of LED spectrum
Žabka, Jindřich ; Hudcová, Lucie (referee) ; Skryja, Petr (advisor)
Teoretical part of the thesis is introducing light sources. Here are examinated the principles of light generation in these light sources, basic radiometry and photometry variables, according to which are these sources sorted and their operating parameters. The parameters describing quality of light sources are also mentioned here. Next part examinates LEDs, theirs usual construction types and most common SMD LED packages. Part about optical spectroscopy describes usually used components for optical measurement. Practical part narrates appropriate organization of workplace, LabVIEW platform, communication process with instruments and a guide describing measure process. There is a solved laboratory protocol as an attachement.
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Test Equipment for Solder Joint Strength Measuring
Čechák, Ondřej ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This master thesis introduces the problematics of the tensile strength of soldered joints and the correlative mathematical formulas and the use of mentioned problematics in the technology of die shear/pull machines designed for the solder joint tensile strength measurement. It explains the importance and reasons for the use of this technology. The emphasis is then laid on the design and construction innovations of the current laboratory manual shear/pull measuring machine, its semi-automation and the possibility of utilizing the innovated system in a laboratory class of a subject on FEEC BUT.
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Temperature Profiles Measurement of SMD Packages
Strapko, Jaroslav ; Szendiuch, Ivan (referee) ; Starý, Jiří (advisor)
Diploma thesis mainly deals with temperature management and calculation of temperature profile in oven by using SMD packages (PLCC, 1206) of different thermal capacitance on testing PCB. Above all shows theoretical consecution of temperature profile calculation in oven by using known mathematical method like the lumped capacitance method or finite difference method. Theoretical solution and measured values are compared. Diploma thesis also deals with fixation methods of thermocouples K type on assembly, comparison methods based on known and subexperiment, determines the deficiencies of methods. This thesis can perform as theoretical as well as experimental resource to prediction of temperature profiles of PCB´s with different assembly density.
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Solder Joint Quality based on Heating Factor
Kučírek, Martin ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
Master’s thesis in the theoretical part analyses the heating factor (Q), which has significant share on quality of a solder joint. The practical part describes the design and production of test PCB and setting temperature profiles, SMD resistors soldering by using BiSn solder paste. Shear tests of SMD solder joints were realised and evaluated including isothermal ageing samples. At the end of master’s thesis solder joints visual aspects and defects were evaluated, measurement thickness of intermetallic compound by not only optical microscope but also SEM, discussion about results and Q was evaluated.
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DC/DC step-up converter for notebook
Škunda, Michal ; Klíma, Bohumil (referee) ; Červinka, Dalibor (advisor)
Given bachelor’s thesis devoted to a proposal and implementation of transducer STEP-UP for supplying of notebook in car. Introduction presents dividing of switching power supplies followed by a choice and a proposal of power supply. In this work we can find the specific proposal of inductor, the proposal of electronic connexion and the proposal of PCB layout. There is a software EAGLE used for the design of PCB layout. In the last part of work there are particular courses of current and voltage that characterize power supply pictured. The work contains measured load characteristic of switching power supply loaded by notebook as well. Notebooks need to have quality power supplies that is why there was a special attention paid to the quality of supply and its electric parameters.
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Mini reflow oven
Pavelka, Radek ; Jelínek, Aleš (referee) ; Burian, František (advisor)
This thesis is aimed to design a small oven for PCB soldering using the reflow method. It contains description of the oven’s construction, it’s thermodynamic parameters and the design of the control and power unit PCB as well as their control software. A remote PC control and monitoring application is also a part of this thesis.
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Wetting Balance Method Modification for SMD Wettability Measuring
Drab, Tomáš ; Kahle, Petr (referee) ; Starý, Jiří (advisor)
Project presents main influence on wettability of SMD and PCB using solder SAC 305 and testing possibilities. We have designed modificaton of wettability balance method leading to the solder globule method. We were testing thermal profile difference and then we determined thermal difference compensation. We were testing few types of SMD packages terminations and PCB´s surface protections, with two solders and two fluxes. We were comparing their wetting forces, wetting speed, and wetting stability. We have proposed other possibilities to optimisation of the method and testing.
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