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Cylinder : Jurnal Ilmiah Teknik Mesin
Published by Universitas Katolik Indonesia Atma Jaya
ISSN : 2252925X     EISSN : 30469821     DOI : https://doi.org/10.25170/cylinder
Core Subject : Science, Engineering,
Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Cylinder: Jurnal Ilmiah Teknik Mesin is an open-access peer reviewed journal that aims to publish original articles on research and development in the field of engineering and applied science. Topics of interest include, but are not limited to: - Renewable Energy & Thermofluids - Material & Manufacturing - Mechatronics, Robotics, & Optoelectronics - Mechanical Design & Mechanism - Industrial Engineering & Ergonomics - Automotive Engineering - Environmental Engineering
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 98 Documents
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Robot Self-Balancing Berbasis LEGO Mindstorm EV3 Untuk Pembelajaran Robotika Christiand, Christiand; Kenny, Adrian; Christiand; Kurniawan, Riccy
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 11 No 1 (2025): April 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.v11i1.6675

Abstract

Robotics education must be implemented effectively to develop students' conceptual understanding and technical competencies. One relevant approach involves the development of self-balancing robots as an exemplary platform that facilitates learning in mechanical design, control systems, and sensor programming. The success of this approach critically depends on the appropriate selection of both tools and methodologies. The LEGO Mindstorms EV3 platform is an ideal tool due to its assembly convenience, design flexibility, and seamless hardware-software integration for robotic development. Implementing a LEGO Mindstorms EV3-based self-balancing robot provides valuable learning opportunities in robotic control algorithms utilizing gyroscopic sensors, ultrasonic sensors, and servo motors. This research work presents the design and implementation process of a LEGO Mindstorms EV3-based self-balancing robot as an innovative educational tool for robotics. The platform supports integrated mastery of theoretical concepts and technical skills, fostering comprehensive engineering and control systems learning.
Perilaku Termal Baterai Kendaraan Listrik pada Siklus Mengemudi NEDC dan WLTP: Studi Simulasi Menggunakan GT-Suite Said, Mohd Farid bin Muhamad; Sutjiadi, Adrian; Setiawan, Yosua
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 11 No 1 (2025): April 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.v11i1.6678

Abstract

This study examines the thermal behaviour of a LiFePO₄ battery pack in a converted electric vehicle using GT-Suite simulation. The base vehicle, a Toyota Avanza originally powered by a 1.3-litre engine, was retrofitted with a 60 kW synchronous AC motor and a 268.8 V, 40.32 kWh battery pack. Simulations were conducted under NEDC and WLTP driving cycles, both with and without passive cooling. Results showed that battery temperature peaked at 45.3°C (NEDC) and 71.6°C (WLTP) without cooling, and was reduced to 36.6°C and 48.0°C respectively with passive cooling. Temperature spikes coincided with rapid acceleration and high-speed phases, highlighting the influence of discharge current on battery heating. These findings demonstrate the importance of thermal management in EV conversions and the effectiveness of passive cooling. Future work will focus on experimental validation and discharge current control via a battery management system (BMS) to ensure battery safety and longevity.
Keselamatan dan Proteksi Baterai Sepeda Motor Listrik: Studi Kasus Analisis Kegagalan Pada Insiden Kebakaran Kapal Motor Penumpang (KMP) Tranship 1 Khrisna, R. Hanggoro Ananta; Yanto; Soewono, Arka Dwinanda
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.v11i2.6945

Abstract

The adoption of electric motorcycles in Indonesia has seen rapid growth, driven by the push toward a sustainable energy transition. However, battery safety remains a significant concern, particularly with Lithium-ion and Sealed Lead Acid (SLA) battery types. This study aims to analyze the failure mechanisms behind a fire incident on the passenger motor vessel (KMP) Tranship 1, which was allegedly triggered by a Lithium-ion battery from an electric motorcycle lacking an adequate protection system. The analysis employs Fishbone Diagrams and Fault Tree Analysis (FTA), drawing on data from field case studies, evaluations of protection systems in locally manufactured electric motorcycles, and a review of relevant technical literature. The root cause analysis using the Fishbone Diagram identifies several contributing factors to fire risk, including improper usage and charging practices, inadequate transportation methods, extreme environmental conditions, and equipment failure. Findings from the Fault Tree Analysis highlight the critical role of safety components such as fuses, circuit breakers, and ventilation systems in preventing battery-related fires or explosions in electric vehicles. Based on these findings, the study recommends the implementation of multilayered protection systems, the use of standardized chargers, and the development of national regulations aligned with international safety standards. The incorporation of a Battery Management System (BMS) is also strongly recommended to enhance battery safety and reliability.
Akurasi dan Fleksibilitas: Perbandingan Metode Konvensional dan Kontinu dalam Pengukuran Koefisien Muai Panjang Logam Goenawan, Stephanus Ivan
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.v11i2.6951

Abstract

This study compares two methods for measuring the coefficient of linear expansion of metals: the Conventional (Discrete) Method and the New (Continuous) Method, focusing on effectiveness, accuracy, and flexibility. Thermal expansion is a crucial phenomenon in materials engineering, and the coefficient of linear expansion is crucial for predicting metal behavior under temperature variations to prevent structural failure. The historically dominant Discrete Method (MD) relies on the linearity assumption and fundamentally requires an initial length (L0) as an absolute reference. This dependence limits flexibility in dynamic experimental situations, where subsequent measurements must reference the original L0. With the development of numerical calculus, the Continuous Method (MC) was developed based on the differential principle, where the coefficient of linear expansion can be calculated from infinitesimal changes in length and temperature without requiring an explicit L0. This approach allows measurements from any point, making it more adaptable for incremental testing. Through numerical simulations on five metals, this study evaluates both methods in two scenarios: an initial measurement of the coefficient of linear expansion and the flexibility of measurements from different temperatures. The results show that both methods produce very close linear expansion coefficient values when measured from the same initial conditions. However, MK proved much more adaptive and efficient, consistently producing valid linear expansion coefficient values without being tied to the original L0. MK can use the length data available at that time as a starting point for subsequent measurements, in contrast to MD, whose results become inconsistent if not referenced to L0. This flexibility of MK is particularly relevant for dynamic material testing and advanced experiments where initial conditions may not always be known or may change. This study presents scientific justification and practical guidance for adopting MK as a more flexible alternative in the thermal characterization of modern materials.
Pengaruh  Pemasangan Suction Pre-Filter Terhadap Konsumsi Suction Main-Filter Dan Konsumsi Listrik Pada Centrifugal Kompresor IHI T2A200 – H di Pabrik PT. XYZ Eko Yuwono, Roni; Setyanto, Djoko
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.v11i2.6973

Abstract

Kompresor udara menyumbang sebagian besar energi yang dikonsumsi, dimana energi tersebut merupakan konsumsi listrik yang digunakan untuk menjalankan kompresor dan biaya perawatannya, salah satunya adalah biaya konsumsi suction filter. Oleh karena itu perlu dilakukan perbaikan terus menerus untuk menekan biaya operasional pabrik, salah satu caranya adalah dengan mengurangi konsumsi suction filter melalui modifikasi penambahan suction pre-filter dan diperoleh konsumsi listrik kompresor yang optimal. Metode yang digunakan dalam percobaan adalah dengan memvariasikan antara suction pre-filter (modifikasi filter) dan suction main-filter (original filter) sebagai parameter independent dibandingkan dengan Aliran Udara (m3/jam), Arus (A) dan daya motor (kW) sebagai parameter dependent. Dianalisis untuk mendapatkan nilai yang paling optimal. Suction pre-filter dapat memperpanjang masa pakai suction main-filter dari masa pakai sebelumnya yaitu 2160 jam menjadi 8640 jam. Jadi presentase kenaikannya sebesar 300%, melebihi target biaya Perusahaan sebesar 30%, dan juga menurunkan biaya listrik.
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 %.
Infill Density Effects on Impact Strength of PLA+ Sutjiadi, Adrian; Setiawan, Yosua
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.v11i2.7036

Abstract

3D printing is an additive manufacturing method. In its process, several parameters can be adjusted to achieve the desired printing results. This study examines the effect of infill percentage on the Charpy impact strength of PLA+ materials made using the fused deposition modeling (FDM) method. The specimens used follow the ISO 179-1 type 1 standard without notches and are made with infill variations of 20%, 40%, 60%, 80%, and 100%. Each variation is tested five times using a JB-S300 Charpy impact tester. The absorbed energy is then calculated into the Charpy impact strength (kJ/m²) according to the ISO 179-1 standard. The results show that the impact strength increases with increasing infill, from 10.9 kJ/m² at 20% infill to 30.4 kJ/m² at 100% infill. These results emphasize the effect of infill on energy absorption and the importance of parameter control to improve the consistency of results in FDM printed PLA+ components.
Pengaruh Energi Input Micro-Plasma Arc Welding Terhadap Struktur Mikro dan Sifat Mekanik Sambungan Baja DIN 2311 Yota, Richard Shan; Manalu, Ferry Rippun Gideon; Widiarto, Sandra Octaviani B.; Basuki, Widodo Widjaja
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.v11i2.7366

Abstract

Molds are important components in the plastic injection molding processes. Even though molds are generally made of strong and heat-resistant steel, but when used repeatedly and continuously, the mold will also experience damage such as scratches and dents caused by dynamic thermal and mechanical loading. Making new molds requires very high costs. Mold repairs using traditional welding such as laser welding and Tungsten Inert Gas welding, apart from requiring relatively high costs, also require sophisticated skills. This problem can be overcome with Micro-Plasma Arc Welding (MPAW). With this welding method, the process of melting the material and filler is concentrated at one point which prevents the spread of excess heat to the parent material. Welding on DIN 2311 low alloy steel, which is often chosen as a plastic molding material, was carried out with weld energies of 120, 132 and 144 J. The welding results were tested to determine the microstructure evolution, hardness distribution and strength values ​​of each specimen. From the test results of materials processed through MPAW, it can be concluded that the specimen produced with a weld energy of 132 J has the most optimal microstructure and hardness distribution so that it can have strength equivalent to the strength of the original material before welding, with relatively high ductility as proven by its ability to perform plastic deformation of 7.8% or just 3.2% lower than the ability of the original material.

Page 10 of 10 | Total Record : 98

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