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All Journal OSEATEK ENGINEERING Jurnal Teknologi REKAYASA Machine : Jurnal Teknik Mesin SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) Community Empowerment Asian Journal of Mechanical Engineering
Irfan Santosa
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Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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RANCANG BANGUN MESIN CNC LASER GRAFIR UNTUK PEMBUATAN BIDANG SILINDER DAN DATAR IRFAN SANTOSA; Mafazi Rifqi; Mouhammad Agus Shidiq
Machine : Jurnal Teknik Mesin Vol 8 No 2 (2022): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v8i2.2741

Abstract

The development of technology that is growing rapidly at this time has had an impact in various fields, including in the industrial sector. In Indonesia, industrial equipment is still mostly imported from abroad. This of course makes it difficult for the industry in Indonesia to develop because of the high price of industrial equipment. To overcome this, it is necessary to conduct research on the design of industrial equipment for domestic production. In this article, a CNC tool is designed that can be used for engraving or in other terms to automatically draw a pattern on a certain area. Laser Engraving Machines require a circuit control system that functions as the brain of the machine. The purpose of this research is to design a control system for a laser engraving machine using a microcontroller. In this study, the method used is an experimental method in the form of a laser engraving machine design including a driving mechanism, structural elements and the design process. All parameters will be set and operated through the CNC control system so that the laser engraving machine can operate properly. The design planning of this CNC Laser Engraving machine has dimensions with a length of 600 mm, a width of 500 mm. The assembly process for the CNC Laser Engraving Machine is classified into several parts, namely: Basic Machine Framework with an assembly time of 50 minutes, Y-Axis Assembly Moves Tool Front-To-Back with an assembly time of 32 minutes, X-Axis Assembly Moves Tool Side-To-Side with assembly time of 13 minutes, Rotary Table with assembly time of 25 minutes. The performance results of each Axis on this CNC Laser Engraving machine have a high level of accuracy, namely: X Axis = 100%, Y Axis = 100%, Rotary Axis = 100%
Modeling of conventional single slope solar still (CS4) with phase change material (PCM) Santosa, Irfan; Dwi Septiyanto, Muhamad; Andriyanto, Sholikhin; Budiana, Eko Prasetya Budiana; Hadi, Syamsul; Wijayanta, Agung Tri
Rekayasa Vol 18, No 1: April 2025
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v18i1.29386

Abstract

This study investigates the capability of two-dimensional Computational Fluid Dynamics (CFD) simulation to estimate the temperature distribution pattern and velocity contours in a single slope solar still that uses soybean wax as a phase change material (PCM). A triangular mesh model is employed in the simulation. The basin geometry uses a mesh with 20,402 nodes and 10,000 elements, while the PCM geometry uses a mesh consisting of 9,272 nodes and 4,500 elements. This study introduces an equation developed based on the Dunkle, Bulk Motion, and Chilton-Colburn analogies to estimate the Nusselt number in the solar still. The water temperature (Tw), the inner surface temperature of the glass cover (Tg), and the PCM temperature (Tpcm) are determined experimentally, whereas the performance of the conventional solar distillation system is predicted theoretically using the experimental results. The results demonstrate that the use of soybean wax as a PCM positively influences the temperature distribution and streamline patterns within the single slope solar still. In the morning, the temperature and velocity distributions reveal that the isotherm lines are parallel to the lower right segment of the cavity, indicating that conduction is the dominant heat transfer mechanism. As the day progresses, the streamline pattern inside the cavity expands and becomes more curved, suggesting an increased influence of the convection process. These findings are consistent with the CFD analysis results, which show high accuracy in predicting Nusselt numbers. Furthermore, the comparison between daily distilled water productivity from experimental measurements and theoretical predictions shows good agreement.
Enhancement increasing the productivity of the traditional herbal “Jamu Mak Lin” through a community partnership program Hapsari, Ira Maya; Akhmadi, Amin Nur; Tulodo, Rizki Prasetyo; Santosa, Irfan
SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) Vol. 6 No. 2 (2025)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/spekta.v6i2.14742

Abstract

Background: The traditional home-based herbal medicine industry,” Jamu Mak Lin” faces challenges, including traditional herbal medicine production methods on traditional equipment. The packaging and labels of herbal medicine are not registered. There is a scarcity of effective door-to-door marketing strategies. A lack of good management and financial accountability systems. Contribution: The main objective is to increase the productivity of “Jamu Mak Lin” traditional herbs through improvements in production processes and equipment, financial management, and marketing strategies. Method: The method applied is Participatory Action Research (PAR), consisting of both hard and soft programs. Results: The results show a significant improvement in liquid herb production, reaching 150 bottles of 350 mL (approximately 52.5 liters), with an estimated increase in productivity and profit of up to 85% per day. In addition, “Jamu Mak Lin” traditional herbal products have been registered for halal certification, and the packaging design has been improved to be more elegant, hygienic, and readable. Conclusion: Through this community partnership program, the productivity and income of “Jamu Mak Lin” traditional herbal products have significantly increased. The next program’s sustainability is achieved by diversifying herbal medicine dipping and herbal medicine cafes.
Effect of Holding Time in Pack Carburizing Using Bamboo Charcoal on the Mechanical Properties of ST 41 Steel Feris Kurniaawan; Muhamad Fajar Sidiq; Irfan Santosa
Asian Journal of Mechanical Engineering Vol. 1 No. 2 (2025): July – December (In progress)
Publisher : Global Scientific Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study investigates the effect of holding time in the pack carburizing process using bamboo charcoal on the mechanical properties of ST 41 steel. The carburizing treatment was conducted at a temperature of 850 °C using a solid carburizing medium consisting of bamboo charcoal and barium carbonate in an 80:20 ratio. Holding time variations of 45, 65, and 85 minutes were applied. After carburizing, the specimens were quenched in SAE 20W-50 oil and subsequently tempered at 350 °C for 20 minutes. Mechanical characterization included Vickers hardness testing, wear testing, and impact testing. The results indicate that holding time has a significant influence on the mechanical properties of ST 41 steel. The average hardness increased with longer holding time, from 162.0 VHN for untreated material to 175.2 VHN at 45 minutes, 185.5 VHN at 65 minutes, and 196.5 VHN at 85 minutes. Wear test results showed a reduction in wear rate with increasing holding time, reaching the lowest value of 0.000029 mm³/kg·m at 85 minutes. In contrast, impact strength decreased as holding time increased, from 3.302 J/mm² for untreated steel to 2.934 J/mm² at 85 minutes. These results demonstrate that longer holding time in pack carburizing enhances surface hardness and wear resistance of ST 41 steel but reduces its impact toughness. An 85-minute holding time provides the best hardness and wear resistance, although accompanied by a decrease in impact strength. This study provides a reference for optimizing heat treatment parameters to improve the performance of mechanical components, particularly gears.
Co-Authors Agus Wibowo Agus Wibowo Amin Nur Akhmadi, Amin Nur Andriyanto, Sholikhin Budiana, Eko Prasetya Budiana Deddy Prihadi Dwi Septiyanto, Muhamad Edi Sudrajat, Subur Feris Kurniaawan Galuh Renggani Wilis Galuh Renggani willis Ira Maya Hapsari M Fajar Nurwildani Mafazi Rifqi Muhamad Fajar Sidiq Muhammad Agus Shidiq Mursyidah Dwi Hartati, Mursyidah Dwi Ponoharjo, Ponoharjo Rizki Prasetyo Tulodo Royan Hidayat rusnoto rusnoto Soebyakto Syamsul Hadi Wijayanta, Agung Tri