This study aims to determine the effect of the thickness of the Layer and Exposure Time on the strength, impact toughness applied to the prototype of the reduction gear post, test specimens made using SLA DLP 3D Printer with 3D UV Resin Anycubic material and referring to ASTM D-256. In this research, creating objects using SLA DLP 3D Printer uses CAD data which is then converted into G-Code with Creation Workshop software. Factors investigated were layer thickness, exposure time with response impact strength using Charpy method of test specimens. The test result data were analyzed using ANOVA with type 2 factorial level design, 2 factorial interaction design (2FI), and replication 3 modelled by Design-Expert software. The results of the analysis revealed that the main factor that had the most influence on the impact strength of the test specimens was the layer Thickness factor with a percentage contribution of 52%, while the interaction between Layer Thickness and Exposure Time contributed 6%. Based on impact testing with a layer thickness parameter of 0.05 millimetres and an Exposure Time of 15 seconds, the optimal results are an average impact price of the Charpy method 0.005600 Joule/mm2.
Additive Manufacturing (AM) is a breakthrough in manufacturing technology based on a layer by the layer printing process through various raw material input techniques. Objects to be printed using a 3D model design by adding raw materials to a 3D printing machine are opposite to subtractive manufacturing types, such as in a CNC milling machine. The purpose of this study was to obtain optimal parameters on the DLP type 3D printing machine for product roughness values using methods that include literature, design, and experimental studies. The specimens tested were 30x15x4 mm in size, with ultraviolet resin material. The test results were analyzed based on the 2-level factorial experimental design type and the 3FI design model, which was processed using the Anova method. The analysis results show that the optimal parameter for the DLP type 3D printing machine for the product surface roughness is the layer height; 0.035 mm, exposure time; 19.542 s, and bottom exposure; 60.679 s with a roughness value of 0.469 µm.
Teknologi 3D Printer DLP (Digital Light Process) adalah mesin pencetak 3 dimensi yang berbahan resin dengan system penyinaran menggunakan proyektor cahaya dengan proses pencetakan lapis demi lapis. Pada penelitian ini penulis akan membuat objek yaitu salah satu komponen permesinan yaitu casing gearbox. Dalam penelitian ini penulis akan menganalisa pengaruh parameter proses (exposre time, off time, dan interkasi keduanya) terhadap dimensi hasil cetak dan mendapatkan parameter paling optimal guna diaplikasikan ke komponen atau objek pencetakan. Dalam melakukan pengujian pengukuran dimensi penguji menggunakan alat ukur jangka sorong Krisbow KW06-422. Kemudian data hasil pengukuran diolah dengan metode Anova dengan bantuan software design expert version 10. Setelah dilakukan proses penelitian didapatkanlah hasil yaitu parameter yang paling berpengaruh adalah factor interaksi antara parameter exposure time dan parameter off time terhadap dimensi pada benda yang dicetak, dan kombinasi parameter yang paling optimal terdapat pada parameter exposure time 10 second dan off time 1 second dengan tingkat ketelitian sebesar 95%.
The development of Industrial technology 4.0 was characterized by cyber-physical systems. This era make it easier for humans to connect with other humans, with industrial machines, and with the environment around them. With the industrial revolution 4.0 can be significantly increase the productivity. At this time, the single part products are often needed, where the product is used only a little and without needed for mass production or be known a custom design. The products that are custom design can be made by a 3D Printer (3DP) machine. 3D Printing is one of the newest technologies in the printing world, where the 3D printing technology is an easy to print and easy to develop the solid product with 3DP technology. In this study, the printing objects of 3DP using CAD data and then converted into G-Code using Creation Workshop software version 1.0.0.75. This study aims to determine the effect of layer thickness and exposure time to geometric of shaft made by 3D Printer with technology Digital Light Processing (DLP). The specimens tested is Ø20 x 100 mm with material Liquid Photopolymer Resin. The data from the test results analyzed using ANOVA with a 3-level design type and 2 factorial interactions (2FI) with 3 replications modeled by the Design-Expert® 10 trial version software. The results of the 5-point method analysis show that the main factor of most influences on the cylindricity of the test specimens is the layer thickness factors, and the optimum combination of parameters in this study is layer thickness 0.075 mm and exposure time 15 seconds.
The world is currently entering the era of the industrial revolution of 4.0. The era in which the occurrence of disruptive technology. The main purpose of this existence of the industrial revolution to create stability in the distribution of goods and necessities. Broadly speaking, there are some benefits that can be posed by the presence of the industrial revolution 4.0 is encouraging research, customization, and optimization. In addition, there are several challenges to be faced in the industrial revolution was the first IE 4.0 security, the second is the capital, and then a third that is employment, and the fourth is privacy. A method that can respond to these challenges is additive manufacturing using SLA-DLP 3D Printing. The making of objects utilizing CAD data that have been made in advance. This research aims to know the effect of object making process parameters with digital light processing rapid prototyping technology on bending stress. The parameters investigated is the layer thickness and the exposure time. Test specimens made of a material with liquid photopolymer resin refer to ASTM D 790 using SLA-DLP 3D Printer. Measurement results in data analysis using ANOVA design with type 2 factorial design model and level 1 factorial interactions assisted by software Design Expert trial version. The results of the ANOVA is known that factors significantly (α = 0.001), to effect of object making process parameters with digital light processing rapid prototyping technology on bending stress., that are the layer thickness=10%, exposure time=2%, interaction layer thickness and exposure time=87%.
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