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INDONESIA
JURNAL POLI-TEKNOLOGI
Published by Politeknik Negeri Jakarta
ISSN : 14122782     EISSN : 24079103     DOI : https://doi.org/10.32722/pt.v20i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
Poli-Teknologi Journal is a journal, which began publication in 2002, published by the Research and community service Unit of Politeknik Negeri Jakarta. It starts from Volume 1 Number 1 in January 2022 for printed version; ISSN (print) 1412-2782 and ISSN (online) 2407-9103. Poli-Teknologi Journal is a series of scientific publications in applied science and technology area from the perspective of a multi and interdisciplinary studies and it is published 3 times in year.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 11 Documents
 1   2 
Search results for , issue "Vol. 19 No. 2 (2020)" : 11 Documents clear
Pengaruh Dip Time Pada Unit Processor Terhadap Linearisasi Plate Cetak Cholid Mawardi
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2499

Abstract

This study aims to analyze the effect of the parameters on the processing unit on the quality of the printing plate. The parameters used in this study use the immersion time method. This research activity also aims to be able to know the real picture of the effect of changes in immersion time on the quality of the printed plate. Expected results of research on the effect of immersion time on the quality of printing plates, namely the extent to which immersion time affects the quality of Computer to Plate (CtP) plates to be printed on offset printing machines. Next, the researchers will also formulate problems that arise due to the development of plaques and provide solutions. This research should be a reference for users involved in improving print quality. For the printing industry can be used as a material consideration in the process of manufacturing quality printing plates for the good of the printing industry which is good at global competition.
Rancang Bangun dan Pengujian Kinerja Mesin Pemisah Isi Biji Buah Durian Akmal Indra
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2701

Abstract

The making process of Lempuk Durian is almost same  as Dodol’s, the difference is only at the mixing of sticky rice (ketan). Dodol is made with the mixing of sticky rice while Lempuk isn’t. Durian flesh is separated by its contents and then finely ground with a grinding machine. The process of separating the contents and seeds of durian fruit is still using conventional methods, by using a punch-filled basket while being pressed by hand. This way can cause injury to the hand, this way can cause injury to the hand, requires a long time and workers get tired more quickly. The purpose of this research is to make content and durian seed separator machines and conduct performance analysis. This content and durian seed separator machine has a capacity of 20kg / production. After testing and observing the durian seed separator machine, then the performance analysis is carried out to determine the ability of the machine. Machine working capacity (KKM) is obtained at 1 kg / minute with the value of the separation of contents and durian seeds of 87%.
Prototipe Mesin CNC Diode Laser Cutting 5500 Miliwatt Untuk Pembuatan Produk Kreatif Bahan Akrilik suharto suharto
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2713

Abstract

Advances in manufacturing technology in the creative industries began to leave the dominance of the role of humans into automated systems to produce high-quality products. CNC laser machine is a computer-programmed machine used to make a product by cutting, scraping, and engraving. In general, people think that CNC machines are expensive goods. The purpose of this study was to design a prototype diode type CNC laser machine for the manufacture of creative acrylic material products. The research method uses the stages of designing, manufacturing, and testing the performance of a diode type CNC laser machine. The CNC laser machine is designed as cheaply as possible by minimizing self-made components and using standard components such as machine frames using aluminum extrusion, laser using a 5500 mWatt laser diode type, stepper motor as an X, Y, and Z axis. Control software is used by USB CNC controller . CAD software is used by Aspire Vectric and CAM software is used GRBL with Adruino Nano microprocessors. The results of a  Diode Laser CNC machine prototype with dimensions of 450×400×300 (mm); work area dimensions 300×200×35; engine weight 5 (kg). The ability to cut a diode Laser of 5.5 watt CNC machine on black acrylic 3 (mm) with an average time of 0.5 mm/s is the best result. Diode Laser CNC Machine engraving capability of clear acrylic material with dark color paper cover machining time 10 (mm / s).
Rancang Bangun Jig & Fixture Untuk Pipe Fitting Steel Concentric Reducer Pada Mesin Bevel Pipa Nurul Ulfah; Rahman Hakim; Michael Tri Adelitho
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2742

Abstract

The development of manufacture Industries in the world rapidly increases especially in Indonesia. One of the manufacture industries is pipe fitting. PT Flo Bend Indonesia is the only manufacturer of pipe fitting steel and iron in Indonesia. The production process of pipe fitting is carried by the machining process. Quality of product produced by PT Flo Bend is depended on jig and fixture. Some of the problems that often appear are the variation of the material dimension that can disturb the beveling process. The time is needed to be longer to change the jig and fixture that suitable with material that needs to be cut. Therefore, this study was conducted to solve the problems by designing the jig and fixture that are more flexible and can adjust to the varying material dimension. The design focuses on the varying of concentric reducer size. Fishbone diagram was used to analyze the problems so that the approximate design concept can be determined. The result of FEM simulation shows 27,3 Mpa for the stress maximum and 8,1 for Factor of safety. Based on FMEA simulation, the design can reduce the time almost 600 minutes. In addition, the design can reduce the cost of the process. Therefore, it can be concluded that the design concept is safe to use.
Analisis Pengaruh Tanaman Vetiver Terhadap Stabilitas Lereng Putri Kurniawati
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2744

Abstract

This research analyzed the influence of vetiver strengthening on slope stability. The research do in prototype media, where the slope was planned 80°. Before planting vetiver, firstly original soil is tested by index and engineering properties test. Based on the test, we can conclude that the soil use is silty clay with the value of qu and cohesion of prototype with 3 vetiver are 0,322 kg/cm2 and 0,085 kg/cm2. In prototype with 6 vetiver, the value of qu and cohesion are 0,329 kg/cm2 and 0,025 kg/cm2. Vetiver planted and tested by direct shear and unconfined compression test at planting time 4 - 7 and 16 weeks. At 16 week, the value of qu and cohesion of prototype with 3 vetiver are 0,714 kg/cm2 and 0,306 kg/cm2. In prototype with 6 vetiver, the value of qu and cohesion are 0,782 kg/cm2and 0,325 kg/cm2. The test result parameters are used as inputs to GeoStudio. Based on the program, in prototype with 3 vetiver, the safety factor increase from 0,516 to 1,519, and in prototype with 6 vetiver the safety factor increase from 0,201 to 1,545. So, it can be concluded that vetiver can improve slope stability.
Perbaikan Tanah Lempung Lunak Dengan Metode Prefabricated Vertical Drain (PVD) Rifki Ali
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2745

Abstract

In Kapal Betung toll road project (Kayu Agung - Palembang - Betung) in South Sumatra, the subsoil consists of soft clay soil. The long-term problem of a slowdown in consolidation is a problem that needs to be addressed in this type of soil. One of soil improvement methods to accelerated consolidation process for increasing the soil strength process is the application of Prefabricated Vertical Drain (PVD). PVD method must be accompanied by a initial load to increase the pore water pressure, so that the consolidation can proceed. Soil is a material commonly used for a initial load, not only soil but also vacuum pressure can also be used as a initial load. Based on the analysis, the value of settlement consolidation in this project was between 0,37 and 1,32 meters with a variety of natural consolidation periods ranging from 16,66 to 35,75 years. When using PVD with a 1 m distance and a reference value of ch/cv 1,5, the time of consolidation is 4 to 10 weeks. It can be concluded that PVD can accelerate the consolidation period. When we use PVD combined with loads in the form of landfill and vacuum pressure, PVD precharge construction time is 14 to 126 days with high of initial load soil precharge levels 7,61 to 9,86 meters, while the construction time for vacuum PVD method is 6 to 14 days with a precharge pile height of 4,67 to 6,92 meters. From the results of the analysis, it can be concluded that the vacuum method has advantages that it doesn’t take a long time to make a slopes contruction as a initial load. Vacuum method also requires less soil as a initial load needed than the preload method. It can be happened because of the vacuum pressure can replace ± 4 meters of landfill. 
Rancang Bangun Alat Purifikasi Biogas Water Scrubber Berbasis Mikrokontroler Farradina Choria Suci
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2804

Abstract

Biogas is one of the potential renewable energies to be developed in Indonesia. Biogas contains CH4 as the primary element, besides containing impurities such as H2S and CO2. The presence of these gases can reduce the quality of biogas and can cause corrosion in equipment. Therefore, it is necessary to purify the gas content, one of them by using a water scrubber. Purification of CO2 and H2S gas levels by using a water scrubber is a physical purification. Purification can also be done chemically, one of them by using CaO. In this research, the media used to make biogas were water hyacinth, cow dung and vegetables, while the media for purification used wood sawdust pellets, quicklime pellets (CaO)  and mixed lime and wood lime pellets. The purification process was divided into 3 experiments, the best result was the third experiment with the percentage of biogas production by 15 kg of vegetables with 7.5 kg of cow dung and 15 liters of water, and adding EM-4 by 5%. The results showed the greatest reduction in CO2 gas with a water scrubber media of 54% while the largest H2S gas value with a water scrubber media with CaO and sawdust by 66%.
Analisa Pengaruh Bentuk Sudut Pada Baja Castellated Dengan Menggunakan Metode Finite Element Aa Santosa
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2805

Abstract

This study examines Kastella beams with cantilever structures using a non-prismatic profile to optimize the steel cross section in resisting external loads. In this study IWF 2500×250×20 steel profile was used. Analysis using finite element with 360 computer fusion program which is a product of Autodesk, as a calculation program to determine the value of the voltage and displacement that occurs in the beam. The process of making castella steel is by perforating the steel profile I into a hexagon with an angle that varies from 45º to 70º, or by cutting the steel profile and then reassembling it by welding it. The research was carried out using 45o and 60o tilt angles, it aims to determine the maximum tilt angle in terms of strength that can withstand loads, both stress and displacement. The simulation process is carried out using a 2000 N load, using A36 material. Based on the research results obtained parameters in the form of stress and displacement. The stresses on castella steel with a slope angle of 45o and 60o are 0.70 Mpa and 0.71 Mpa, respectively. The displacement of the castella steel with a tilt angle of 45o and 60o is 0.002 mm and 0.019 mm, respectively. The results showed that the castella beam with smaller hole angular dimension variations resulted in lower stress values in the structure and the remaining cutting in the optimal test specimen, but produced a large displacement value.
Analisis Tingkat Kecacatan Produk Cetak Kemasan Karton Lipat Dengan Pendekatan DMAIC Six Sigma Saeful Imam; Wiwi Prastiwinarti
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.2951

Abstract

The map of competition in the business world in the industrial sector makes consumers' demands on the quality of products produced even higher so that the industry has an obligation to provide the best service to consumers in order to maintain the sustainability of its business. This is evenly distributed in all industrial sectors including the printing industry. Based on preliminary observations at one of the large printing presses in Jabodetabek the failure rate of printed folding carton packaging products produced is still quite large. The integrated production process makes the process results affect each other the number of defects in the next process. The results of observations show that of the 3 main processes of folding cardboard packaging production at PT.X, the aim of printing and ponding has the highest defect percentage of 47% and 44% of the total defect, while the glueing  process has the lowest percentage of 7% with a total total defect of 827,347 packages of a total production of 4,735,350. From the results of data recapitulation and calculation of the number of defects, it can be seen that the sigma value of the company with the sample production data taken has an average sigma of 3.6. Through the application of the Six Sigma DMAIC method this research seeks to provide solutions in overcoming the problems of defective products that occur during the production process so that the main purpose of the printing industri in increasing productivity can be achieved.
Daftar Isi Politeknologi Vol. 19 No. 2 Mei 2020 Tim Editor Tim Editor
Jurnal Poli-Teknologi Vol. 19 No. 2 (2020)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v19i2.3402

Abstract

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