![]() ![]() Note regarding updated files: STL files that get updated after the initial release do not always get added to the ZIP file. Use the forum at to discuss clock making topics or assembly issues. Go to to download the latest assembly guide. They mainly consist of music wire for the arbors, bearings, common sized wood screws, fishing line, and filler for the weight shell. The design includes both metric and imperial sized components to support parts available in your country. Total print time is 150 hours using 1.3kg of PLA filament. A future scaled version is planned that will fit a Prusa Mini (180x180x180mm) or similar sized machine.Ī few hidden non-printed parts are required to minimize friction and achieve the long runtime. The pictures show the size of this clock next to my other much smaller clock design. The clock is nearly 20 inches (0.5m) tall while fitting the print volume of a Prusa MK3S (210x250x210mm) or Creality Ender 3 (220x220x250mm). The gear tooth profile is a new style that prints cleaner and the escapement has been redesigned to give more consistent printed results. Nearly every part has been optimized for 3D printing instead of just porting an old style brass design. Runtime is more than 4 days and I think it has a nice symmetrical look. The deadbeat escapement is accurate to around 1-2 minutes per week. The primary goals for this clock were to be accurate, functional, and nice looking. The escapement is up front and the gears are very visible.Ī video of the clock in operation can be found at ![]() 20, Issue 17 (September 2020), art.This is my largest and most impressive 3D printed wall clock. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Ministerio de Ciencia e Innovación PID2019-103904RB-I00Īgència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1159Īquest document està subjecte a una llicència d'ús Creative Commons. Ministerio de Ciencia e Innovación TEC2016-75650-R These synchronous 3D-printed all-dielectric encoders based on permittivity contrast are a good alternative to microwave encoders based on metallic inclusions in those applications where low cost as well as major robustness against mechanical wearing and aging effects are the main concerns. One of the AM envelope functions provides the absolute position, whereas the other one provides the clock signal and the velocity of the encoder. Thus, by injecting two harmonic signals, conveniently tuned, at the input port of the splitter/combiner structure, two amplitude modulated (AM) signals are generated by tag motion at the output port of the sensitive part of the reader. Such a structure is able to detect the presence of the apertures when the encoder is displaced, at short distance, over the slots. For encoder reading, a splitter/combiner structure with each branch loaded with a series gap and a slot resonator (each one tuned to a different frequency) is considered. Such absolute position can be determined as long as the whole encoder is encoded with the so-called de Bruijn sequence. Synchronous reading is necessary in order to determine the absolute position if the velocity between the encoder and the sensitive part of the reader is not constant. One such aperture chain contains the identification (ID) code, whereas the other chain provides the clock signal. The considered encoders are based on two chains of linearly shaped apertures made on a 3D-printed high-permittivity dielectric material. In this paper, 3D-printed electromagnetic (or microwave) encoders with synchronous reading based on permittivity contrast, and devoted to the measurement of displacements and velocities, are reported for the first time. Departament d'Enginyeria Electrònica) Date: ![]() ![]() Departament d'Enginyeria Electrònica) Martín, Ferran (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) Paredes, Ferran (Universitat Autònoma de Barcelona. Web of Science: 6 citations, Scopus: 7 citations, Google Scholar: citations 3D-printed all-dielectric electromagnetic encoders with synchronous reading for measuring displacements and velocities Herrojo, Cristian (Universitat Autònoma de Barcelona. ![]()
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