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All Journal Martabe : Jurnal Pengabdian Kepada Masyarakat Vocatech : Vocational Education and Technology Journal MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Rekayasa, Teknologi, dan Sains Jurnal Masyarakat Madani Indonesia
Sembiring, Alexander
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Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences

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Design of Hole Digging Machine for Papaya Planting Preparation Sembiring, Alexander; Wahyudi, Retno
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 6 No 2 (2024): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v6i2.330

Abstract

The agricultural production process heavily relies on land preparation, which significantly impacts the outcomes. Optimal land preparation is the initial step towards achieving maximum yields. Digging planting holes provides suitable growth spaces, eliminates weeds, and improves soil physical properties. Currently, hole digging processes are predominantly done manually (using hoes, manual augers), which are inefficient, time-consuming, and result in uneven holes. Through this research, a machine was designed to swiftly and uniformly dig planting holes to support pepaya growth. The machine utilizes a Honda GX-120 gasoline engine with a maximum power of 2.6 kW at 3,600 rpm to drive a gearbox connected to a soil drilling shaft made of 1.25-inch-thick iron pipe with a 3.2 mm thickness and equipped with 4 mm thick iron screw blades. These machine components are integrated into a mainframe with wheels for ease of movement during the hole digging process. Proses produksi pertanian sangat bergantung pada persiapan lahan, yang akan mempengaruhi hasil yang didapatkan. Persiapan lahan yang optimal merupakan langkah awal untuk mendapatkan hasil yang maksimal. Pembuatan lubang tanam dapat menyediakan tempat tumbuh yang sesuai untuk pertumbuhan, membasmi tumbuh-tumbuhan penggangu, dan memperbaiki sifat-sifat fisik tanah. Saat ini proses pelubangan tanam masih banyak dilakukan secara tradisional (menggunakan cangkul, ulir manual) yang tidak terlalu efektif dan membuuthkan waktu yang lama untuk melakukan proses pelubangan tanam, dan menghasilkan lubang tanam yang tidak seragam. Melalui peneilitian ini dirancang sebuah mesin yang dapat membuat lubang tanam secara cepat, dan seragam yang akan mendukung proses pertumbuhan pepaya. Hasil yang dirancang menggunakan mesin penggerak motor bensin Honda GX-120 dengan daya maksimal 2,6 kW pada putaran 3.600 rpm untuk menggerakkan gearbox yang terhubung dengan poros pengebor tanah dari pipa besi berukuran 1,25 inch dengan ketebalan 3,2 mm dan terdapat daun screw besi dengan ketebalan 4 mm. Elemen-elemen mesin ini disatukan dalam sebuah rangka utama yang terdapat roda, sehingga dapat mempermudah pergerakan mesin ini dalam proses pelubangan tanam.
Designing of Machine to Make Sectional Flight Screw Wahyudi, Retno; Sembiring, Alexander
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 6 No 2 (2024): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v6i2.331

Abstract

An Auger resembles a large Screw, but its blades are designed to lift and move material, rather than fasten it like a Screw. The primary function of an Auger is to bore holes by rotating and using its blades to cut and extract material, thus clearing the hole. Manual leaf processing remains a common practice in many areas, which is time-consuming and labor-intensive, often resulting in inconsistent product quality. This process is inefficient and incurs high operational costs, reducing profits for farmers and small industries. This research aims to design and develop a leaf-making machine with a sectional Flight Screw type. The methodology includes literature review, prototype design and development, performance testing, and data analysis. The machine has dimensions of 63 x 21.5 x 57.5 cm, using materials such as 4x4 cm angle iron, 5 mm thick IWF iron, and 15 mm thick plate iron. The semi-mechanical Screw leaf-making machine has a maximum pitch length of 165 mm, a maximum Screw diameter of 360 mm, a maximum thickness of 10 mm, and a maximum torque of 3.5 kg.m, producing high uniformity among the Screw leaves made by the semi-mechanical Auger machine. Auger menyerupai sekrup besar, namun bilahnya dirancang untuk mengangkat dan memindahkan material, bukan mengencangkan. Fungsi utama Auger adalah mengebor lubang dengan memutar dan menarik material keluar. Pengolahan daun secara manual masih umum di banyak daerah, memakan waktu dan tenaga serta menghasilkan produk berkualitas tidak konsisten. Proses ini tidak efisien dan memerlukan biaya operasional tinggi, mengurangi keuntungan petani dan industri kecil. Penelitian ini bertujuan merancang dan mengembangkan mesin pembuat daun tipe Screw sectional Flight. Metodologi mencakup studi literatur, desain dan pengembangan prototipe, pengujian kinerja, serta analisis data. Mesin memiliki dimensi 63 x 21,5 x 57,5 cm, dengan bahan besi siku 4x4 cm, besi iwf tebal 5 mm, dan besi plat tebal 15 mm. Mesin semi mekanis ini memiliki kapasitas maksimal panjang pitch 165 mm, diameter daun Screw 360 mm, tebal 10 mm, torsi 3,5 kg.m, dan menghasilkan keseragaman tinggi.
Optimizing MATLAB Applications to Advance Automotive System Development Ibrahim, Fauzi; Hadi, Agung Efriyo; Marjuni, Teuku; Apriyanto, Agus; Putri, Novia Utami; Wahyudi, Retno; Sembiring, Alexander; Murti, Adam Wisnu
Jurnal Rekayasa Teknologi dan sains Vol 9, No 2 (2025): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v9i2.21385

Abstract

The automotive industry continues to evolve with the integration of sophisticated computational tools to optimize design, analysis, and control systems. MATLAB, known for its powerful numerical and simulation capabilities, has emerged as a key tool in achieving efficiency, accuracy, and automation across automotive engineering processes. This study explores the strategic utilization of MATLAB in areas such as engine modeling, vehicle dynamics simulation, embedded system development, and control system design. The research employs a qualitative method supported by case studies from various industrial applications, highlighting how MATLAB toolboxes like Simulink, Stateflow, and Simscape contribute to reducing development time and improving system performance. Results show that optimized MATLAB use not only accelerates prototyping and testing phases but also enhances precision in control strategies, especially for electric and autonomous vehicles. This paper concludes by emphasizing the growing importance of MATLAB proficiency among automotive engineers and its role in driving digital transformation in the industry. 
Analysis of Thermal Efficiency of the Honda GK5 Engine Fueled with Young Coconut Waste Bioethanol Using a Thermodynamic Approach Wahyudi, Retno; Ibrahim, Fauzi; Sembiring, Alexander; Apriyanto, Agus; Murti, Adam Wisnu; Putri, Novia Utami
VOCATECH: Vocational Education and Technology Journal Vol 7, No 1 (2025): August
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v7i1.214

Abstract

The global energy crisis and increasing awareness of the negative environmental impacts of fossil fuels have driven the development of sustainable alternative energy sources. One promising renewable fuel is bioethanol, especially when produced from agricultural waste such as young coconut waste. This study aims to evaluate the effect of using bioethanol derived from young coconut waste on the thermal efficiency of the Honda GK5 engine through thermodynamic analysis based on the Otto cycle model and verification using experimental data. The research method includes laboratory testing of the Honda GK5 engine with variations in fuel mixtures: E0, E10, E20, and E30. The test results show a significant increase in thermal efficiency up to the E20 mixture, with an experimental efficiency of 31.8% and a theoretical efficiency of 32.0%. This improvement is attributed to the high octane number of bioethanol, which supports more complete combustion. However, at the E30 mixture, a decrease in efficiency is observed due to the lower heating value of bioethanol. The Otto cycle model successfully represents the trend of thermal efficiency with an average deviation of 1–1.5% compared to experimental results. Therefore, bioethanol from young coconut waste proves not only to be environmentally friendly but also capable of enhancing engine energy performance optimally without requiring significant modifications.
PENERAPAN TEKNOLOGI MELALUI TRAINER KIT ENERGI BARU TERBARUKAN DI SMKN 1 MERBAU MATARAM, LAMPUNG SELATAN Utami Putri, Novia; Jafar Adrian, Qadhli; Febrian, Angga; Rizki Dalimunthe, Ernando; Wahyudi, Retno; Sembiring, Alexander; Edi Rosandi, Aditya
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 8, No 7 (2025): MARTABE : JURNAL PENGABDIAN KEPADA MASYARAKAT
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v8i7.2934-2940

Abstract

Penerapan teknologi melalui Trainer Kit EBT sebagai sumber energi terbarukan semakin penting dalam mengatasi krisis energi dan perubahan iklim global. Artikel ini membahas penerapan teknologi sebuah trainer kit ini dirancang sebagai media pembelajaran untuk meningkatkan pemahaman teknis dan keterampilan praktis dalam pemasangan, pengoperasian, dan pemeliharaan sistem tenaga surya di SMK Negeri 1 Merbau Mataram. Trainer kit ini mencakup modul-modul praktis yang meliputi instalasi panel surya, sistem penyimpanan energi, dan konfigurasi inverter, serta simulasi masalah nyata yang sering terjadi dalam implementasi PLTS.
Pengolahan Pakan Ternak Berkualitas dengan Mesin Mix-Chop Portable di Pekon Mataram Kecamatan Gading Rejo Kabupaten Pringsewu Natalina, Natalina; Ibrahim, Fauzi; Ergantara, Rani Ismiarti Ergantara; Wahyudi, Retno; Apriyanto, Agus; Putri, Novia Utami Putri; Sembiring, Alexander; Murti, Adam Wisnu
Jurnal Masyarakat Madani Indonesia Vol. 4 No. 4 (2025): November (In Progress)
Publisher : Alesha Media Digital

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59025/5h21q179

Abstract

Pekon Mataram di Kecamatan Gading Rejo, Kabupaten Pringsewu, Provinsi Lampung memiliki potensi besar di bidang pertanian dan peternakan, namun masih menghadapi keterbatasan dalam penyediaan pakan ternak berkualitas. Selama ini, peternak mengandalkan rumput liar yang tersedia melimpah, tetapi pemanfaatannya belum optimal karena proses pengolahan yang masih tradisional sehingga nilai gizi dan efisiensi pemakaiannya rendah. Untuk mengatasi permasalahan tersebut, kegiatan pemberdayaan masyarakat dilakukan melalui penerapan mesin mix-chop portable yang mampu mencacah dan mencampur rumput dengan bahan tambahan bergizi, disertai pelatihan pembuatan pakan fermentasi serta manajemen pemeliharaan ternak. Tujuan kegiatan ini adalah meningkatkan kualitas dan kuantitas pakan, memperbaiki manajemen usaha peternakan, serta memperluas akses pemasaran hasil ternak. Metode pelaksanaan meliputi sosialisasi, pelatihan, penerapan teknologi, pendampingan, dan evaluasi yang melibatkan partisipasi aktif peternak. Hasil kegiatan menunjukkan adanya peningkatan keterampilan peternak dalam mengolah pakan, efisiensi waktu dan tenaga, serta terbentuknya kelompok usaha bersama yang mendukung keberlanjutan program. Hasil kegiatan menunjukkan adanya peningkatan keterampilan peternak dalam mengolah pakan sebesar 80%, peningkatan efisiensi produksi hingga 50%, serta kenaikan rata-rata bobot ternak sapi sebesar 18%. Sebanyak 20 peserta pelatihan berhasil mengoperasikan mesin mix-chop dan memproduksi pakan fermentasi secara mandiri.
Co-Authors Apriyanto, Agus Edi Rosandi, Aditya Ergantara, Rani Ismiarti Ergantara FEBRIAN, ANGGA Hadi, Agung Efriyo Ibrahim, Fauzi Marjuni, Teuku Murti, Adam Wisnu Natalina Natalina Novia Utami Putri Putri, Novia Utami Putri Qadhli Jafar Adrian Rizki Dalimunthe, Ernando Utami Putri, Novia Wahyudi, Retno