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Jurnal Teknik Mesin
Published by Institut Teknologi Padang
ISSN : 20894880     EISSN : 25988263     DOI : https://doi.org/10.21063/jtm
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
JTM is a journal aims to be a peer-reviewed platform and an authoritative source of information. We publish original research papers, review articles and case studies focused on mechanical engineering and other related topics. All papers are peer-reviewed. JTM is managed to be issued twice in every volume (April and October). The Scope of JTM is: Energy Science and Engineering Applied Mechanics and Materials Design, Manufacturing and Product Development Control, Instrumentation and Robotics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 247 Documents
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Design Development of Coffee Roaster with Quality Function Deployment Method Satria, Fajri Ilham; Saferi, Rozi; Yanto, Asmara
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.1-7

Abstract

This research aims to identify and determine the level of consumer needs regarding the coffee roaster and to compile a House of Quality (HOQ) to determine dominant design needs and priority technical characteristics of the machine. The benefit of this research is to be able to develop the coffee roaster and to maximize machine use and time efficiency in roasting coffee. The research method used is the Quality Function Deployment (QFD) method by conducting field surveys aimed at finding out the level of consumer needs by distributing questionnaires and looking for information about what the need to make it easier to roast coffee beans. The location of this research was carried out in several café or coffee shop in Padang City. Based on the column weight, it was found that the strongest priority in the technical response was the design aspect with a value weighting of 38.64, followed by the material criteria aspect with a value weighting of 66.1, then time and energy efficiency with values ​​weighting of 30.34 and 15 respectively.. The design for developing coffee roaster according to consumer needs lies in a more affordable price which makes the use of materials and sizes of horizontal sangria equipment cheaper compared to conventional coffee roasting equipment.
The Effect of Firmware Settings on Engraving Results of a CNC Laser Engraver Machine Anrinal, Anrinal; Zamhari, Muhammad Apri; Yanto, Asmara
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.21-26

Abstract

This study aims to determine the effect of setting the firmware on the time and results of the engraving and to analyze the impact of the engraver variable on the CNC Laser Engraving machine. The test results of the cnc laser engraving firmware setting were obtained from several stages of testing the predetermined settings such as the Axis maximum rate and Axis acceleration settings, in order to find the appropriate Axis maximum rate and Axis acceleration settings for the laser engraving process. Tests with the Axis maximum rate setting are carried out with variables 600 mm/min,1200 mm/min,1800 mm/min aiming to find the ideal speed, Tests with Axis acceleration settings are carried out with variables 20 mm/s2, 40 mm/s2, 60mm/s2. aims to find the ideal acceleration by looking at the stability of the results and comparing the test data. axis maximum rate ($110 and $111) 600 mm/min and axis acceleration ($120 and $121) 40 mm/s2, taking into account the engraving time and the resulting clean, non-blur engraving results and the resulting engraving line width. Based on the study, it is recommended for users to be careful in setting the firmware for maximum and clean results. Based on the speed and acceleration test data on the engraving scale, the faster the engraving process, the smaller and blurry the resulting scale (width of the engraving) will be.
The Effect of Variation in the Composition of Candlenut Shell Charcoal Powder/Epoksi Composite on Hardness Value, Friction Coefficient and Specific Wear Rate Pratiwi, Putri; Nurzal, Nurzal; Syaifullah, Muhammad; Perdana, Mastariyanto
Jurnal Teknik Mesin Vol 14 No 1 (2024): Jurnal Teknik Mesin Vol.14 No.1 April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2024.v14.i1.33-37

Abstract

Organic waste processing by utilizing the candlenut shell charcoal has great potential to produce useful materials. The large seed and skin ratio makes candlenut shells very abundant during the harvest season. Candlenut shells are known as agricultural waste even though they have great potential to be utilized because of their good mechanical properties. The purpose of this study was to determine the effect of composition variations in candlenut shell charcoal powder composites on their mechanical properties such as hardness values, friction coefficients and wear rates. The materials used are candlenut shell charcoal powder and epoxy, with a fraction ratio of 55%: 45% wt, 60%: 40% wt, 65%: 35% wt, 70%: 30% wt, 75%: 25% wt, 80%: 20% wt, 85% : 15% wt. The size of the candlenut shell charcoal powder used is 841-1190 μm. The results of the study showed the highest hardness of 74.94 HRN, a wear value of 0,000077407407 g/mm2, and the friction coefficient of 0.2108.
Innovation and Utilization of FABA Bean Waste as Briquette Material: A Study on Combustion Characteristics sambo, maysharah; Handra, Nofriady
Jurnal Teknik Mesin Vol 15 No 1 (2025): Jurnal Teknik Mesin Vol.15 No.1 April 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2015.v5.i1.15-22

Abstract

This study aims to investigate the innovation and utilization of fly ash bottom ash (FABA) waste from PLTU Ombilin as a briquette material, focusing on its combustion characteristics. FABA, a by-product of coal combustion, poses environmental challenges if not properly managed. In this research, FABA was blended with pyrolyzed pecan shells and starch as a binding agent, then compacted into briquettes with varying compositions. The combustion characteristics, including ignition time, combustion temperature, and calorific value, were evaluated using standard testing methods. The results indicate that variations in raw material composition significantly influence briquette performance. Briquettes containing 70% FABA, 20% pecan shell, and 10% starch exhibited the longest ignition time of 4 minutes and 3 seconds, with an average combustion temperature of 243°C. Meanwhile, briquettes composed of 60% FABA, 30% pecan shell, and 10% starch achieved the highest average combustion temperature of 376°C, with a flame duration of 3 minutes and 34 seconds. The highest calorific value, 8,714 cal/g, was obtained from briquettes containing 40% FABA, 10% pecan shell, and 40% starch. These findings demonstrate the potential of FABA waste as an alternative fuel source and contribute to sustainable industrial waste management and the development of environmentally friendly energy materials.
Reverse Engineering and Structural Optimization of a Pneumatic Rotary Slip Lifter for Enhanced Safety and Operational Efficiency in Drilling Rigs Yosserizal, A.R.Yosserizal; Saferi, Rozi; Yanto, Asmara
Jurnal Teknik Mesin Vol 15 No 1 (2025): Jurnal Teknik Mesin Vol.15 No.1 April 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2025.v15.i1.23-39

Abstract

This study presents the reverse engineering and structural optimization of a Pneumatic Rotary Slip Lifter (PSL) to enhance safety and operational efficiency in drilling rig operations. Conventional manual rotary slips expose personnel to ergonomic hazards and reduce handling efficiency during drill pipe manipulation. The existing slip mechanism was digitized through reverse engineering and analyzed using three-dimensional finite element analysis (FEA) to evaluate stress distribution, deformation, and safety factors under operational loading conditions. The optimized design incorporates a pneumatic actuation system operating at 90–120 psi, enabling automated lifting and lowering of the slip assembly. Structural optimization ensured compliance with allowable stress limits while minimizing material usage. Simulation results show a maximum von Mises stress of 103.2 MPa—well below the 250 MPa yield strength—and a minimum safety factor of 2.01, indicating reliable elastic performance. Probabilistic reliability assessment yielded a high reliability index (β ≈ 8.5) and negligible probability of failure, while fatigue analysis confirmed infinite-life behavior under cyclic tripping loads. Operational evaluation demonstrated reduced handling time, elimination of manual lifting, and improved ergonomic safety. The proposed PSL offers a structurally validated, reliable, and economically viable alternative to conventional manual slips, supporting safer and more efficient mechanized drill pipe handling.  
Effect of Oil Palm Empty Fruit Bunch Fiber Length on Flexural Performance and Macrostructure of Palmfiber Reinforced Concrete Vantri, Vedrix; Asfarizal
Jurnal Teknik Mesin Vol 15 No 1 (2025): Jurnal Teknik Mesin Vol.15 No.1 April 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2025.v15.i1.40-46

Abstract

This study investigates the influence of fiber length of oil palm empty fruit bunch (EFB) on the flexural performance and macrostructure of Palmfiber Reinforced Concrete (PRC) as a sustainable alternative to Glassfiber Reinforced Concrete (GRC). EFB fibers were selected due to their availability, environmental benefits, and potential to improve the mechanical properties of lightweight concrete. Five fiber lengths (3, 4, 5, 6, and 7 cm) were incorporated into PRC specimens. Flexural tests revealed that 5 cm fibers achieved the highest flexural strength of 11.78 kg/cm², while 4 cm fibers provided the maximum modulus of elasticity at 162.2 kg/cm². Macrostructural observations indicated satisfactory fiber–matrix bonding in most specimens; however, variations in fiber distribution and manual compaction affected overall performance. These findings demonstrate that fiber length significantly impacts the mechanical behavior of PRC, emphasizing the need for optimized production techniques to ensure consistent material quality.
Structural Evaluation and Optimization of a Peanut Shelling Machine Frame Using Finite Element Analysis Hakim, M. Ibnu; Anrinal, Anrinal; Yanto, Asmara
Jurnal Teknik Mesin Vol 15 No 2 (2025): Jurnal Teknik Mesin Vol.15 No.2 October 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LP2M) - ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtm.2025.v15.i2.47-55

Abstract

This study investigates the structural integrity of a peanut shelling machine frame with a capacity of 60 kg/hour using Finite Element Analysis (FEA) in SolidWorks. Two configurations of ASTM A36 angle steel profiles—40×40×3 mm and 20×20×3 mm—were evaluated with a frame geometry of 906×600×900 mm. Operational loads were applied to three critical zones with aggregate weights of 82.6 kg, 5.3 kg, and 13.1 kg, respectively. The structural response was assessed through von Mises stress distribution, nodal displacement, and safety factor analysis. Results indicate that the 40×40×3 mm frame exhibits a maximum stress of 37.114 MPa, displacement of 0.2431 mm, and a safety factor of 6.7, while the 20×20×3 mm frame shows a maximum stress of 73.978 MPa, displacement of 0.4521 mm, and a safety factor of 3.4. Both designs satisfy structural safety requirements, maintaining stresses below the material yield strength of 250 MPa and safety factors above the minimum threshold of 2.0. Stress concentrations were predominantly observed at frame corners. While the smaller profile reduces material usage by 50%, it also decreases stiffness by 86%. The findings demonstrate that the 20×20×3 mm configuration is a cost-effective alternative for static loading conditions, whereas the 40×40×3 mm frame provides higher rigidity suitable for potential dynamic load scenarios.

Page 25 of 25 | Total Record : 247

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