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All Journal Teknika Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Vokasi Journal La Multiapp ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) BERKAT: Jurnal Pemberdayaan Masyarakat Formosa Journal of Science and Technology (FJST) Jurnal Pengabdian Masyarakat Bestari (JPMB) Sinergi Polmed : Jurnal Ilmiah Teknik Mesin atech-i Komposit : Jurnal Pengabdian Dan Pemberdayaan Masyarakat International Journal of Business and Quality Research
Franklin Taruyun Hudeardo Sinaga
Politeknik Negeri Medan
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Pengaruh Media dan Jeda Pendinginan Las SMAW terhadap Kekuatan Tarik ST37 Saragi, Jandri Fan HT; Boangmanalu, Eka Putra Dairi; Sinaga, Franklin Taruyun Hudeardo; Bahri, Nisfan; Marbun, Abri Andry Saresa
TEKNIKA Vol. 20 No. 1 (2026): Teknika Januari 2026
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.17732355

Abstract

Proses pengelasan banyak digunakan dalam industri manufaktur untuk menyambung baja karbon rendah seperti ST37, sehingga kontrol terhadap pendinginan menjadi penting untuk menentukan kualitas sambungan. Penelitian ini bertujuan menganalisis pengaruh media pendinginan (air, udara, oli) dan waktu jeda (0, 30, 60 detik) terhadap kekuatan tarik sambungan las ST37 hasil SMAW. Sembilan spesimen diuji untuk memperoleh nilai gaya dan tegangan tarik maksimum, kemudian dianalisis menggunakan ANOVA dua arah. Hasil menunjukkan bahwa media dan waktu jeda pendinginan berpengaruh signifikan terhadap kekuatan tarik; pendinginan air tanpa jeda memberikan nilai tertinggi, sedangkan oli dengan jeda menghasilkan nilai terendah. Temuan ini menegaskan bahwa pendinginan cepat mampu menghasilkan struktur mikro yang lebih halus dan kuat. Secara praktis, hasil penelitian ini dapat menjadi acuan dalam menentukan prosedur pendinginan optimal guna meningkatkan kualitas sambungan las pada industri manufaktur dan perawatan komponen.
Optimasi Penggunaan Aktuator Langsung dalam Sistem Otomasi Kendaraan Otonom untuk Aplikasi Logistik.A Riview Faisal Naulia; Franklin Taruyun Hudeardo Sinaga
Atech-i Vol. 3 No. 1 (2025): Tahun 2025
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/atech-i.v3i1.47

Abstract

Penelitian ini bertujuan untuk mengoptimalkan penggunaan aktuator langsung dalam sistem otomasi kendaraan otonom yang digunakan dalam aplikasi logistik. Fokus utama dari penelitian ini adalah meningkatkan efisiensi dan akurasi pengendalian kendaraan otonom dalam kondisi lingkungan yang dinamis, seperti pengiriman barang dengan rute yang beragam dan medan yang bervariasi. Penelitian ini menggunakan pendekatan kontrol optimal dengan Linear Quadratic Regulator (LQR) untuk meminimalkan biaya kontrol dan meningkatkan respon serta presisi kendaraan. Hasil simulasi menunjukkan bahwa penggunaan aktuator langsung yang dioptimalkan memberikan peningkatan signifikan dalam kontrol posisi dan kecepatan kendaraan dibandingkan dengan aktuator konvensional. Pengujian lapangan juga mengonfirmasi bahwa kendaraan otonom dengan aktuator langsung dapat mencapai posisi yang lebih presisi dan stabil, sehingga meningkatkan efisiensi dalam operasional logistik. Penelitian ini diharapkan dapat memberikan kontribusi penting dalam pengembangan teknologi kendaraan otonom untuk aplikasi logistik yang lebih efisien dan andal
Design and Performance Analysis of a SolidWorks-Based Disk Mill Coffee Grinder for MSMEs Franklin Taruyun Hudeardo Sinaga; Eka Putra Dairi Boangmanalu; Jandri Fan HT Saragi; Angga Bahri Pratama; Al Qodry
International Journal of Business and Quality Research Vol. 4 No. 02 (2026): International Journal of Business and Quality Research (IJBQR)
Publisher : Citakonsultindo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63922/ijbqr.v4i02.3305

Abstract

This study presents the design, fabrication, and performance analysis of a SolidWorks-based disk mill coffee grinder specifically developed for Micro, Small, and Medium Enterprises (MSMEs) in Indonesia's expanding coffee industry. Addressing the technological gap between industrial-scale equipment and small-enterprise operational constraints, the research employed parametric 3D modeling and virtual assembly simulation to optimize machine configuration prior to physical fabrication. The design integrates a 5.5 HP gasoline engine with a 3:1 pulley reduction system, angle iron frame structure (600×600×730 mm), and adjustable pin-type grinding disks to achieve targeted processing capacity and particle uniformity. Performance testing demonstrated that the machine successfully processes 1 kg of roasted coffee beans in approximately 8 minutes, yielding a theoretical throughput of 30 kg/hour with consistent particle distribution suitable for various brewing methods. Material loss was maintained below 2%, while operational vibration and noise levels remained within acceptable limits for workshop environments. The SolidWorks-driven design methodology significantly reduced material waste and iterative physical modifications by enabling early detection of interference conflicts and spatial optimization during the digital prototyping phase. These findings confirm that CAD-integrated engineering approaches can effectively support the development of cost-effective, maintainable, and scalable processing equipment tailored to MSME requirements. The resulting disk mill configuration offers a practical solution for enhancing product consistency, operational efficiency, and competitive positioning within Indonesia's decentralized coffee value chain, while providing a replicable framework for localized agricultural machinery innovation.
Thermal Effectiveness Analysis of Lube Oil Cooler Fan with Capacity of 40.332 Kg/S with Pressure of 5 Bar Pratama, Angga Bahri; Razak, Abdul; Sahat, Sahat; Manurung, Nelson; Ginting, Berta Br; Sinaga, Franklin Taruyun Hudeardo; Zumhari, Zumhari
Journal La Multiapp Vol. 7 No. 3 (2026): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v7i3.841

Abstract

The Lube Oil Cooler Fan is an essential component in the lubrication system of a gas turbine because it maintains lubricating oil temperature within a safe operating range. This study aims to analyze the thermal performance and effectiveness of the Lube Oil Cooler Fan on Gas Turbine GT 1.1 at PT XYZ. The study employed a descriptive quantitative approach using field observation data and heat transfer calculations. The analysis was conducted through the Log Mean Temperature Difference method and heat exchanger effectiveness approach by considering fluid temperature changes, mass flow rates, thermophysical properties, flow characteristics, convective heat transfer coefficients, overall heat transfer coefficient, heat transfer rate, and thermal effectiveness. The results show that the lubricating oil temperature decreased from 61°C to 49°C, while the cooling air temperature increased from 32°C to 53.5°C. The tube side heat transfer coefficient was 40.71 W/m²°C, the shell side heat transfer coefficient was 308 W/m²°C, and the overall heat transfer coefficient was 30.61 W/m²°C. The calculated heat transfer rate was 992.57 W or approximately 0.993 kW. The lubricating oil was identified as the minimum heat capacity fluid, with a heat capacity rate of 33.13 kW/°C. The thermal effectiveness of the Lube Oil Cooler Fan was 41.4%, indicating that the cooler was able to perform its cooling function, although its performance remained moderate. Routine monitoring, stable airflow control, and periodic cleaning are recommended to improve thermal performance.
Efficiency and Performance Analysis of the Design and Construction of a 30 Kg/Hour Coffee Grinding Machine Sinaga, Franklin Taruyun Hudeardo; Saragi, Jandri Fan HT; Boangmanalu, Eka Putra Dairi; Pratama, Angga Bahri; Sahat, Sahat
Journal La Multiapp Vol. 7 No. 3 (2026): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v7i3.1416

Abstract

This study aims to evaluate the performance of a disk mill coffee grinding machine with a design capacity of 30 kg per hour for small and medium scale coffee processing. The machine was developed as a practical gasoline powered grinder to support coffee processing activities, particularly in areas where access to electricity may be limited. A performance test was conducted using roasted coffee beans with three input loads, namely 500 g, 750 g, and 1000 g. The observed parameters included grinding time, grinding capacity, product yield, residual material, material loss, material conversion efficiency, energy efficiency, and grinding quality based on particle size distribution. The results show that the machine achieved an average grinding capacity of 29.68 kg per hour, which is close to the intended capacity of 30 kg per hour. The average product yield and material conversion efficiency reached 94.55 percent, while the average material loss was 1.11 percent. However, residual material remained at 4.00 percent, indicating that the grinding chamber and discharge system still require improvement. The energy efficiency was reported at 73.8 percent, although the engine power specification needs further clarification. In terms of grinding quality, 70 percent of the particles were within the desired range of 500 to 700 micrometers. These findings indicate that the machine is technically feasible for small scale coffee production, but further refinement is needed to improve material discharge, reduce residual particles, and strengthen particle size consistency.
Co-Authors Abdul Razak Al Qadry Al Qadry Al Qadry Al Qadry Al Qodry Alexander Sebayang Angga Bahri Pratama Bahri, Nisfan Boangmanalu, Eka Putra Dairi Eka Putra Dairi Boangmanalu Eka Putra Dairi Boangmanalu Eka Putra Dairi Boangmanalu Faisal Naulia Ginting, Berta Br Marbun, Abri Andry Saresa Nelson Manurung, Nelson Nisfan Bahri, Nisfan Bahri Qadry, Al Roby Hadi Putra Sahat Sahat Sahat Sahat Sahat Sitompul Saragi, Jandri Fan HT Siahaan, Sondang Beatrix Situngkir, Anggiat Sormin, Syariful Hikmah Wawan Septiawan Damanik Zumhari, Zumhari