Title Research of dimensional accuracy and surface quality dependency on printing speed of FDM 3D printed parts /
Translation of Title FDM metodu 3D spausdintų detalių matmenų tikslumo ir paviršių kokybės tyrimas.
Authors Levinskas, Laisvūnas
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Pages 53
Keywords [eng] fdm 3d printer ; dimensional accuracy ; surface quality ; speed ; relative output
Abstract [eng] The impact of increased maximum speed, acceleration and jerk characteristics on dimensional accuracy and surface quality of FDM 3D printed parts has been determined. The FDM 3D printing technologies and working principles of different 3D printers has been analyzed. Types of FDM 3D printers, their construction types and main motion characteristics identified. Research hypotheses have been developed and experiments designed according to possible surface imperfections caused by increased speed. Experiments have been carried out in three main parts. First of all, the influence of increased maximum printing speed on 3D printed part dimensional accuracy and surface quality has been determined. Specimens on two different printers have been printed, measured and scanned for visual analysis. It has been determined that increasing maximum speed changes frequency of surface ringing artifact. High flow rate is a consequence of high speed and causes low relative output and non-linear behavior of the extruder. This result in reduced dimensional accuracy and lower surface quality. Next the influence of increased acceleration and jerk settings on printed part dimensional accuracy and surface quality has been determined. After printing and measuring specimens it has been concluded that increasing acceleration or jerk causes linear reduction in dimensional accuracy. Increasing acceleration and jerk at the same time has cumulative effect. Lastly the relative output of Anycubic i3 Mega 3D printer has been determined by extruding fixed length of filament and increasing speeds. Relative output is reduced as flow rate increases. Increasing nozzle temperature lowers reduction in relative output.
Dissertation Institution Kauno technologijos universitetas.
Type Master thesis
Language English
Publication date 2019