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All Journal Rekayasa Mesin Jurnal Ilmiah Teknik Industri Journal of Mechanical Engineering Science and Technology Jurnal Sistem Teknik Industri Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Engineering, Mathematics and Computer Science Journal (EMACS) Indonesian Journal of Engineering and Science (IJES) IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Jurnal Pengabdian Masyarakat Charitas Cylinder : Jurnal Ilmiah Teknik Mesin
Djoko Setyanto
Universitas Katolik Indonesia Atma Jaya
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences

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Pengembangan dan Implementasi Sistem Ekstrusi 3D Printing Material Silicone Rubber Aditya, Damian Matthew; Setyanto, Djoko; Soewono, Arka Dwinanda; Darmawan, Marten
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 11 No 2 (2025): Oktober 2025
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v11i2.7008

Abstract

Penelitian ini berfokus pada pengembangan dan implementasi sistem ekstrusi 3D printing untuk material silicone rubber. Material silicone rubber adalah salah satu material potensial untuk aplikasi di bidang robotika lunak untuk pembuatan komponen sensor atau aktuator elastis. Namun demikian, teknik manufakturnya masih sangat terbatas. Penelitian ini bertujuan untuk memodifikasi dan mengintegrasi sistem 3D printer 3 axis dan sistem injeksi satu syringe pump untuk mencetak material silicone rubber. Pengujian dilakukan dengan variasi tipe dorongan injeksi dan variasi kecepatan dorong. Dari hasil pengujian, didapatkan tingkat akurasi dimensi hasil cetak objek dan tipe dorongan dorong henti secara berulang dengan kecepatan konstan pada kecepatan dorong 15 atau 0,51 mm/s dan kecepatan cetak 25 mm/s memiliki tingkat akurasi dan dimensi paling baik dengan dimensi sumbu X sebesar 115,78 mm, sumbu Y sebesar 26,02 mm, dan sumbu Z sebesar 0,99 mm serta akurasi 98,2 %.
Rancang Bangun Alat Pencahayaan Terkontrol Berbasis Motor Stepper Dan Railing untuk Studio Fotografi Setyanto, Djoko; De Fretes, Anthon; Astadiningrat, Joseph Prabaswara; Indrajaya, Feryandinata; Dewata Putra, Rangga; Christiand
Jurnal Pengabdian Masyarakat Charitas Vol. 5 No. 02 (2025): Jurnal Pengabdian Masyarakat Charitas
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v5i02.7380

Abstract

Photography studios often require various lighting arrangements for different photo and video shooting themes. Lighting in a studio environment is critical to producing high-quality images and videos. However, conventional lighting sources, such as lamps or other lighting equipment, are often inflexible to reposition according to the photographer’s desired thematic setup. Manual lighting adjustments can be time-consuming, mainly when automated positioning features are unavailable. This inefficiency hampers the photo and video shooting process. In the community service program discussed in this article, the team from the Mechanical Engineering Department at Atma Jaya Catholic University of Indonesia developed a motorized stepper-based lighting system with railing to address the inefficiencies in studio lighting adjustments. The team partnered with Kolaborasi Berkat Kreasindo (KBK) studio. The developed lighting system can be controlled remotely, eliminating the need for direct manual adjustments. This solution has assisted the partner studio in enhancing the lighting setups for photography sessions.
Analisis Kekuatan Tarik Polimer Komposit Polyethylene Terephthalate Berpengisi Karbon Aktif Pada Aplikasi Fuel Cell Iswandi, Iswandi; Setyanto, Djoko
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.319

Abstract

Bipolar plates made from polymer–activated carbon composites offer a lightweight, economical alternative but require a balance between mechanical strength and the amount of carbon filler. This is because a filler fraction that is too high can cause agglomeration and void formation, ultimately reducing the tensile strength and overall performance of the plate. This study aims to evaluate the tensile strength of PET (Polyethene Terephthalate) composites with varying levels of activated carbon. The compositions tested were 90/10, 80/20, and 70/30 (wt%). Specimens were fabricated using a hot press (compression moulding). Tensile testing was conducted in accordance with ASTM D638. The tensile strength value was calculated from the maximum load to the cross-sectional area of ​​the specimen. The test results showed that the composite with 10% activated carbon produced 2.84 MPa. The addition of activated carbon up to 30% decreased the tensile strength to 1.05 MPa. This trend indicates that increasing the activated carbon composition decreases the tensile strength of PET composites for bipolar plate applications.
Pengaruh Head dan Jumlah Nozzle terhadap Kinerja Turbin Pelton Skala Laboratorium Supriatno, Supriatno; Setyanto, Djoko
IRA Jurnal Teknik Mesin dan Aplikasinya (IRAJTMA) Vol 4 No 3 (2025): Desember
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajtma.v4i3.320

Abstract

This experimental study examines the influence of hydraulic head and nozzle number on the performance of a laboratory-scale Pelton turbine. A closed-loop test rig was developed, enabling operation with one, two, and four nozzles. The turbine, consisting of 12 buckets, was mechanically coupled to an electrical generator through a belt–pulley transmission. Experimental results reveal that increasing the number of nozzles enhances turbine efficiency, with recorded values of 2.8%, 15.8%, and 17.7% for single-, double-, and four-nozzle configurations, respectively. Despite this improvement, the turbine failed to operate at its optimal efficiency, primarily due to discrepancies between the available head and the turbine design parameters, as well as energy losses and suboptimal jet impingement.
Design of a Seaweed Draining and Drying Machine Using Hybrid Energy Agri Suwandi; Alif Fachrudin; Djoko Setyanto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8636

Abstract

Seaweed is a plant that is adaptable and is used in a variety of industries, such as food, cosmetics, and medication. However, the current seaweed processing technique, which entails sun drying, is still highly traditional and requires a significant amount of time. To speed up draining and drying seaweed, we developed a hybrid energy-powered seaweed draining and drying. The tool capacity of this design is 50 kg, and it applies the Pahl and Beitz method. The selected design is variant 3 with the highest weight value of 7.74. The design outcomes produce the following tool specifications the drive is equipped with a diesel motor with a power of 3.5 Hp, 2.6 kW, and 3600 rpm, as well as three solar panels of the MCS1100 model, each with a capacity of 100 Wp. The container dimensions of 382 mm diameter and 500 mm height. The seaweed is to be dried at a rate of 29,3 kg/m2 per hour. The galvanized steel frame yielded a maximum working stress value of 126.223 N/mm2, which is lower than the material's yield strength value of 203.943 N/mm2. On the shaft made of S45C8 steel, the maximum working stress value after applying the load is 66.83 N/mm2, which is also less than the material's yield strength value of 350 N/mm2. This indicates that the stand and shaft design is safe, as the simulation process's maximum stress value does not surpass the material's yield strength value.
Chemical Grinding Aids as Chemical Agents to Enhance the Efficiency of Clinker Grinding in Cement Plants Akhwan Purwoko; Djoko Setyanto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 7 Number 2 (2025)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v7i2.8763

Abstract

Chemical Grinding Aids, hereinafter referred to as Grinding Aids, are chemical additives used to optimize the grinding process of clinker and other supplementary materials into cement powder. In practice, these Grinding Aids enhance the efficiency of the grinding process, thereby increasing the capacity of the grinding equipment. As a result of this increased capacity, the electrical energy consumption per ton of cement produced is reduced, leading to a proportional decrease in production costs per ton. In addition to improving productivity, the use of Grinding Aids also contributes to better cement quality. Experimental data presented in this article show that the application of Grinding Aids has a positive impact, increasing production by up to 17% with an optimal dose of 350 ppm when using concentrated Grinding Aids without dilution. Meanwhile, the optimal dose for a Grinding Aid solution diluted in water at a ratio of 1:4 (grinding aids:water) is 300 ppm. This improvement in productivity also leads to a 5% reduction in electricity consumption during the cement grinding process.
Thermal Performance Analysis and Optimization of The Primary Heat Exchanger of The Airbus A320 Rahmad; Ivan Yosia Adiputra; Djoko Setyanto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.9268

Abstract

The Environmental Control System of the Airbus A320 utilizes a Primary Heat Exchanger to cool bleed air before to its entry into the Air Cycle Machine. Despite the significance of this component for optimal system functionality, research integrating operational data, thermodynamic modeling, and heat transfer studies to enhance its performance in commercial aviation remains sparse. This study investigates the thermal performance of the primary heat exchanger and develops a prediction model based on data gathered from an Airbus A320-214 during routine maintenance operations. The study encompassed 15 unique test situations, differing in bleed air temperature, pressure, and mass flow ratios. The results indicate that the heat exchanger attains a thermal effectiveness of 0.68 to 0.74, with an average heat transfer rate of 48.2 to 62.3 kJ/s, and temperature reductions of 45.2 to 52.8°C. The prediction model utilizing the ε-NTU approach exhibited significant accuracy. Subsequent investigation indicated that the mass flow ratio significantly influences thermal efficacy. Particle Swarm Optimization enhanced the efficacy by as much as 8.5%. The results provide practical criteria for predictive maintenance, facilitating effective Maintenance, Repair, and Overhaul choices in commercial aircraft operations.
Co-Authors Aditya, Damian Matthew Agri Suwandi Akhwan Purwoko Alif Fachrudin Anthon de Fretes, Anthon de Fretes Armansyah Armansyah Astadiningrat, Joseph Prabaswara Barzah, Ahmad Alfarizi Christiand Christine Natalia Dewata Putra, Rangga Dewi Puspita Sari Edi Setiyo Eko Yuwono, Roni Ferdian Suprata Gunawan , Harjadi Imron, Jefri Indrajaya, Feryandinata Irfa Kodri Isdaryanto Iskandar Isdaryanto Iskandar Iswandi Iswandi Ivan Yosia Adiputra Kartadinata, Budi Kasda, Kasda Komara, Achmad Moeslihat M Hudori Marten Darmawan Maulana Rachman Permatasari, Arindita Dessi Rahmad Reinaldo, Reinaldo Rudi Hermawan Simanjuntak, Rexon Harris Soewono, Arka Dwinanda Supriatno, Supriatno Victoria Principall Wadirin, Wadirin