000			03272nam a22003737a 4500
999			_c91270 _d91276
003			MY-KuUP
005			20251125105434.0
006			a||||fr|||| 000 0
007			ta
008			191121t20192019my a|||fram|| 000 0 eng d
020			_aTHE0008507(Local)
040			_aUMP _beng _cUMP _erda
090			_aFKMP .F34 2019 r Thesis
100	0		_aFaeiz Azizi Adnan, _eauthor.
245	1	0	_aContour generation for mask projection stereolithography 3d printing / _cFaeiz Azizi Adnan
264		1	_aKuantan, Pahang : _bUMP, _c2019
264		4	_a© 2019
300			_axii, 101 pages : _billustrations (some color) ; _c30 cm. + _e1 CD-ROM
336			_atext _2rdacontent
336			_atext _2rdacontent
337			_aunmediated _2rdamedia
337			_acomputer _2rdamedia
338			_avolume _2rdacarrier
338			_acomputer disc _2rdacarrier
347			_2rda _atext file _bPDF
500			_aFaculty of Mechanical & Manufacturing Engineering
502			_aThesis (Master of Science) -- Universiti Malaysia Pahang – 2019
504			_aIncludes bibliographical references
520	3		_aRecent advancement in 3D printing technology has led to the development of projection mask stereolithography 3D printing process. This process harnesses the power of UV light contour projection to cure photocurable resin. The contour projection is generated by slicing STL CAD model into layers of 2D contours which is then fed into the UV projection device layer-by-layer with respect to the build height. Generation of the layers are computationally intensive. Existing contour generation algorithm requires long computational time to generate the contour layers especially for high polygon models. This is because the existing approach has to slice and compute every single layer of the STL model before the printing process starts. In an effort to reduce the computational time, a new and faster algorithm is required. Thus, a real-time contour generation algorithm is presented in this research. The real-time contour generation approach instantly generates single layer of contour whenever the build height parameter is fed into the algorithm. The algorithm composes of multiple algorithms such as slicing algorithm, pixel line mapping algorithm, and the contour loop algorithm. The proposed slicing algorithm uses line-plane intersection model to generate arbitrary line segment when it receives an STL facet. These line segments are mapped based on the projection device display resolution by the pixel-line mapping algorithm. Then, the pixelated line segments are connected to form single/multiple contour loops using contour loop algorithm. The results of each algorithms are thoroughly evaluated. Computation time measurement is taken using <QElapsedTimer> object in Qt Creator and measured in milliseconds. It is later found that the algorithms able to correctly generates the contour projection layers. Even with the high polygon STL model, the contour generation algorithm able to perform on average 960.15% faster than Park algorithm and 169.18% faster than commercial software Slic3r.
610	2	0	_aFaculty of Mechanical & Manufacturing Engineering _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses
942			_2lcc _cTHESIS