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All Journal Rotasi Jurnal Ilmiah Poli Rekayasa Jurnal Pendidikan Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal Teknologi Terapan Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Jurnal Teknik Mesin Infotekmesin Unistek: Jurnal Pendidikan dan Aplikasi Industri Jurnal Teknologi dan Riset Terapan (JATRA) Abdimasku : Jurnal Pengabdian Masyarakat DEDIKASI PKM DEVICE Jurnal Buana Farma JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Journal of Applied Mechanical Engineering and Renewable Energy (JAMERE) Jurnal Pengabdian kepada Masyarakat (Nadimas) Journal of Applied Mechanical Technology (JAMET) BULLET : Jurnal Multidisiplin Ilmu Indonesian Journal of Community Empowerment
Leo Van Gunawan
Politeknik Negeri Indramayu
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture 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 Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation

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RANCANG BANGUN MESIN PENCETAK TUSUK SATE MENGGUNAKAN TEKNOLOGI DOUBLE ROLL UNTUK MENINGKATKAN PRODUKSI TUSUK SATE DI DESA KRASAK Sukroni, Sukroni; Ghozali, Muhammad; Gunawan, Leo Van
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.804

Abstract

The expansion of the market or need for satay skewers has resulted in micro, small and medium enterprises producing satay skewers, especially in Krasak Kualahan village, to meet consumer needs. In Krasak village, micro, small and medium businesses still use traditional methods to process bamboo into skewers. However, this method requires a long time. Therefore, this machine was created to help skewer production businesses speed up the production process. By making a skewer printing machine using Double Roll technology, it will help businesses to increase production results. Double Roll technology is a technology that utilizes two rolls that are close together to produce thrust. The way this skewer molding machine works is by inserting bamboo pieces 50mm wide and 0.8mm thick, 22 cm long between the rollers that coincide with each other. This machine has 2 knife functions, namely flattening and forming uses an AC electric motor as a driver with specifications 1Phase 1HP 1400RPM.
RANCANG BANGUN MESIN CETAK ECO PAVING BLOCK PNEUMATIK BERBASIS LIMBAH PLASTIK Kusmayadi, Adi; Sukroni, Sukroni; Haris, Emin; Irawan, Candra; Rohmat, Yusup Nur; Syaifurrahman, Arief; Gunawan, Leo Van; Ghozali, Muhamad
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.715

Abstract

The escalating volume of plastic waste has become a critical environmental challenge, highlighting the need for innovative solutions to repurpose it into valuable construction materials. This study aimed to design and develop a pneumatic-based eco-paving block printing machine that uses plastic waste as its primary raw material. The research methodology encompassed the design and simulation of pneumatic circuits, structural analysis involving stress distribution, displacement, and factor of safety (FOS), and strength testing of the fabricated eco-paving blocks. The machine was equipped with a pneumatic cylinder measuring 80 × 75 mm, operating at a pressure of 6 bar and generating a maximum pressing force of 300 kg. The simulation results confirmed that the maximum stress and displacement remained within safe limits, with a minimum FOS of 8.4, thereby ensuring a stable and reliable design. Testing of the eco-paving blocks revealed compressive strengths ranging from 38 to 54 MPa, surpassing the requirements of the SNI 03-0691-1996 standard. This study demonstrates that a pneumatic-based eco-paving block printing machine effectively transforms plastic waste into high-quality construction materials compliant with national standards, offering a practical solution to the plastic waste crisis while promoting sustainability in the construction industry.
ANALISA PERBANDINGAN KEMAMPUAN KARBON AKTIF SEKAM PADI DAN KARBON AKTIF BATOK KELAPA DALAM ALAT FILTRASI AIR Gunawan, Leo Van; Farhan, Ahmad; Rohmat, Abdul; Pujo Leksonowati, Nur Fitria; Purba, Adi Syahputra
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 7 No. 1 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v7i1.9327

Abstract

Dalam instalasi alat filtrasi air terdapat tiga jenis material yang umum dipakai sebagai media filtrasi yaitu Zeolit, Silika dan Karbon. Karbon aktif dapat dibuat menggunakan arang dari limbah hasil pertanian. Di Indonesia limbah sekam padi kebanyakan hanya di bakar atau diolah untuk tambahan pakan ternak. Batok kelapa kebanyakan digunakan untuk bahan untuk produksi briket. Penelitian ini dilakukan untuk membandingkan kemampuan karbon dari limbah sekam padi dan batok kelapa dalam meningkatkan kinerja alat filrasi air saat menyaring zat pencemar. Langkah-langkah dalam pembuatan karbon aktif dari limbah sekam padi dan batok kelapa ini yaitu melakukan proses pretreatment, proses dehidrasi, proses karbonisasi, proses pengaktifan secara fisika dan kimia. Kualitas air dilakukan pengujian menggunakan metode fisika dan kimia dengan mengacu standar kualitas air dari PP Republik Indonesia No 22 Tahun 2021 tentang Penyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup. Hasil pengujian menunjukan air yang dihasilkan dari alat filtrasi menggunakan karbon aktif sekam padi berada pada baku mutu kelas 1 sedangkan air yang dihasilkan dari alat filtrasi menggunakan karbon aktif batok kelapa berada pada baku mutu kelas 2. Hal ini menunjukan penggunaan karbon aktif dari sekam padi dapat meningkatkan kinerja alat filrasi air dalam menyaring zat pencemar apabila dibandingkan dengan penggunaan karbon aktif dari batok kelapa.
PEMBUATAN DAN PENGUJIAN VARIASI PEMBEBANAN TERHADAP WAKTU YANG DIBUTUHKAN MESIN PEMISAH SARI PATI KEDELAI UNTUK PABRIK TAHU Farhan, Ahmad; Ghozali, Muhamad; Novrianda, Raju; Afnanto, Nurul; Nur Rohmat, Yusup; Sukroni, Sukroni; Gunawan, Leo Van; Pradana, Claudha Alba
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 7 No. 1 (2025): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2025
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v7i1.9372

Abstract

In Lohbener Village, Indramayu Regency, small and medium enterprises (SMEs) produce tofu using traditional methods, where the soybean pulp filtering process requires significant time and physical effort. To address this issue, a soybean pulp filtering machine was developed to improve filtering efficiency. The machine was tested with three different input loads—5 kg, 10 kg, and 15 kg—at a constant speed of 57 rpm. The filtering times recorded were 3 minutes 10 seconds, 5 minutes 17 seconds, and 8 minutes 21 seconds, respectively, determined by the point at which no more liquid discharged from the system. The final weights of the filtered soybean pulp were 1.5 kg, 5.7 kg, and 7.4 kg, respectively. These weight differences were influenced by an unbalanced soybean-to-water ratio, which affected extraction effectiveness. The average moisture content of the filtered pulp was 18% for the 5 kg load, 14.90% for 10 kg, and 15.17% for 15 kg. These results indicate that the use of the filtering machine significantly improves filtering efficiency compared to manual methods, in terms of time, output, and pulp quality. Overall, the machine has a positive impact on increasing productivity and product quality in tofu production at the SME level.
Perancangan dan Analisis Mesin Pencacah Rumput Untuk Peningkatan Efisiensi Pakan Ternak di Desa Cipicung Nota, Nota Ali Sukarno; Aziz, Abdul; Gunawan, Leo Van; Nabilah, Prita Retno; Riandi, Maxc Reno Rona
Journal of Applied Mechanical Technology Vol 4 No 1 (2025): JOURNAL OF APPLIED MECHANICAL TECHNOLOGY (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v4i1.305

Abstract

The process of chopping grass for animal feed in Cipicung Village, Sumedang Regency, West Java Province still uses manual methods using simple tools such as machetes and sickles. The use of this tool takes a long time, slowing down the feeding process and requiring human labor. Therefore, the manufacture of a grass chopping machine is needed to simplify the chopping process, make time more efficient and to minimize accidents during the chopping process. The design methods used to obtain data include; field surveys, drawing planning, calculations to determine the components to be used. Based on the calculation results, the machine can chop grass as much as 900 kg/hour or 15 kg/minute. For the rotation of the grass chopper blade needed to chop in 1 minute is 937.5 rpm. While the calculation results of the maximum rotation on the axle pulley are 1800 rpm, then the design can be said to be successful because the rotation of the axle pulley has exceeded the rotation of the chopper blade, which is 937.5 rpm. The simulation results obtained a von misses value of 29.664 N/mm² and a maximum displacement of 0.084 mm and a factor of safety on the frame with a maximum value of 1.5.
​​Pengaruh G96 dan G97 terhadap Kekasaran Permukaan ST 37 dan S45C pada Pembubutan CNC​ pujo leksonowati, nur fitria; Pamungkas, Nurman; Baharudin, Budi; Cahyagi, Danang; Van Gunawan, Leo; Adimas, Adimas
Journal of Applied Mechanical Technology Vol 4 No 1 (2025): JOURNAL OF APPLIED MECHANICAL TECHNOLOGY (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v4i1.308

Abstract

ABSTRACT – This study aims to compare the effects of Constant Cutting Speed (G96) and Constant Spindle Speed (G97) modes on the surface roughness of ST 37 and S45C materials in step-turning processes using a CNC lathe. A comparative experimental method was employed, measuring surface roughness (( R_a )) at stepped diameters (16 mm, 24 mm, 32 mm, and 35 mm) with a Mitutoyo Surface Tester SJ-210. Results indicate that G96 mode produces lower surface roughness, with average ( R_a ) values of 2.22 µm (S45C) and 2.27 µm (ST 37) in the N6 class, compared to G97 mode with ( R_a ) values of 3.08 µm (S45C) and 3.03 µm (ST 37) in the N7 class. G96 mode is superior due to its ability to automatically adjust rotational speed based on diameter, whereas in G97 mode, small diameters with high rotation (1273 rpm) increase roughness due to vibration or heat. This study recommends using G96 mode for optimal surface smoothness in step-turning of similar materials. rning of similar materials.
Rancang Bangun Mesin Pemotong Tahu Otomatis Berbasis Elektropneumatik dengan Pendekatan Participatory Rural Appraisal dan Eksperimental Ghozali, Muhamad; Luthfi, Muhammad; Gunawan, Leo Van; Sukroni, Sukroni; Jayamulya, Agus; Rifani, Ari Khoeri
Journal of Applied Mechanical Technology Vol 4 No 1 (2025): JOURNAL OF APPLIED MECHANICAL TECHNOLOGY (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v4i1.309

Abstract

ABSTRACT – Manual tofu cutting is often time-consuming and less efficient, necessitating innovation to enhance productivity. This study aims to design an automatic tofu cutting machine as a replacement for the manual cutting process. The method used is Participatory Rural Appraisal (PRA) with an experimental approach. The design process involves simulations to determine the machine's technical specifications, resulting in a minimum pneumatic piston diameter of 24 mm, an inertia of 88,281.25, and a maximum stress of 0.24 N/mm². Testing shows that the machine can cut 112 pieces of tofu in 3.8 seconds. These results indicate that the automatic tofu cutting machine significantly improves the efficiency and speed of the cutting process compared to manual methods. This research contributes to the development of more efficient food processing technology applicable to small-scale industries.
Perbaikan Postur Kerja pada Proses Mixing di PT. Xc Cleanindo Farhan, Ahmad Farhan; Baliavi, Fandika; Azmi, Nora; Rahmawat, Novia; Gunawan, Leo Van; Alba Pradana, Claudha
UNISTEK Vol. 12 No. 1 (2025): Februari - Juli 2025
Publisher : UNIVERSITAS ISLAM SYEKH YUSUF TANGERANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33592/unistek.v12i1.7260

Abstract

This PT XC CLEANINDO is a manufacturing startup that provides cleaning and sanitation needs. The mixing and packing process in this company has less ergonomic work postures and facilities. Based on the Nordic Body Map (NBM) questionnaire, operators often feel pain in several parts of the body due to non-ideal working postures, especially repeated bending positions during the mixing process which can trigger back injuries. Postural analysis using the REBA and QEC methods showed a high risk score (REBA: 8, QEC: 61.36%). To reduce this risk, it is recommended to modify the manual lift table according to Indonesian anthropometric data. After improvement, the REBA score dropped to 3, indicating significant improvement in working posture, especially in the operator's neck and back. This implementation is expected to increase productivity and worker health.
Analisis Pengaruh Variasi Suhu Tempering Pada Sifat Mekanik Baja ASTM A36 Setelah Pengelasan SMAW Menggunakan Elektroda E 7016 Gunawan, Leo Van; Satya Andika, Puger; Endramawan, Tito; Haris, Emin; Sukardi, Casiman; Satria Jati, Unggul
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2144

Abstract

ASTM A36 is a type of structural metal that can be applied for various purposes such as making gears, bridge structures and ship buildings. After welding, ASTM A36 steel will produce residual stress. Residual stress in the welded metal is caused not balanced temperature distribution. The method for eliminating residual stress is tempering. Tempering is used to reduce residual stresses, increase the ductility and toughness of metals. This research aims to analyze the effect of variations in tempering temperature on the mechanical properties of ASTM A36 steel after SMAW welding using E7016 electrodes. The tensile strength test on the specimen showed the highest increase due to the tempering effect of 537,880 MPa at a temperature of 200°C. This is proven by the reduction in material hardness of 165.07 VHN at a tempering temperature of 200°C when compared to the hardness of the raw material. The growth of ferrite grains in the material structure shows that the ASTM A36 material is increasingly ductile after tempering. The results of research on the effect of variations in tempering temperature on the mechanical properties of ASTM A36 can be used as an alternative way to increase ductility after the welding process
Inspeksi Sambungan Rangka Mobil Listrik Tipe Tubular Space Frame Menggunakan Las GMAW dengan Cairan Liquid Penetrant Satria Jati, Unggul; Prabowo, Dian; Dwi Hastuti, Hety; Van Gunawan, Leo
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2163

Abstract

Technological developments increasingly require humans to increase their competence and innovation. The process of making frames for electric cars is one of the innovations to produce a strong frame. The frame is the main and important part of a vehicle, because the components and passengers will support the frame. The connection between frame components uses GMAW welding, which is the process of joining metal materials by heating them until they reach their melting point. To obtain a frame that meets the criteria, it is necessary to carry out a testing process, this testing process is NDT testing (Non Destructive Test), namely testing the physical part of the material in a way that does not damage the test object. Meanwhile, the aim of this research is to inspect the electric car frame so as to find discontinuities in the GMAW welding results. The results of this research were that there were 22 samples that underwent the liquid penetrant test process, of the total samples according to ASME Section VIII Division 1 Mandatory Appendix 6 there were 14 specimens that were acceptable while 8 needed improvement in the connection process. After the repair or repair process has been carried out, the frame is declared fit for use.
Co-Authors Abdul Aziz Abdul Rakhman Abdul Rohmat Adi Kusmayadi Adi Syahputra Purba Adimas, Adimas Afnanto, Nurul Ahmad Farhan, Ahmad Amat, Mohammad Azwar Badruzzaman Badruzzaman Baharudin, Budi Baliavi, Fandika Batubara, Ninda Hardina Candra Irawan Casiman Sukardi Ceba Muhamad Ar-Rasyid Chatarina Umbul Wahyuni Danang Cahyagi Dian Prabowo Dian Prabowo Dwi Hastuti, Hety Endramawan, Tito Excel Putra Pangestu Farhan, Ahmad Farhan Ferry Sugara Ferry Sugara, Ferry Haris, Emin Hermawan, Muhammad Ghandy Razzaki Hety Dwi Hastuti Jayamulya, Agus Karjo, Ardy Marwan Effendy Meilani Mandhalena Manurung Mohamad Alif Dzulfiqar Mohammad Amat Mohammad Azwar Amat Muhamad Ghozali Muhamad Ghozali, Muhamad Muhammad Ghozali Muhammad Luthfi Muhammad Nur Hidayat Nabilah, Prita Retno Nora Azmi Nota S Nota, Nota Ali Sukarno Novrianda, Raju Nur Fitria Pujo Leksonowati Nur Rohmat, Yusup Nurman Pamungkas Octavianus Ardhian Nugroho Pangestu, Excel Putra Pradhana, Claudha Alba Puger Satya Andika Rachmatullah Rahmawat, Novia Riandi, Maxc Reno Rona Rifani, Ari Khoeri Riki Factur Rohman Rizky Maulana Akbar Rohidayat, Syarif Rohman, Riki Factur Rohmat, Abdul Satria Jati, Unggul Satya Andika, Puger Simanjuntak, Naomi Margaretha Sitohang, Mostars Mathew Iglesias Sukardi, Casiman Sukarno, Nota Ali Sukroni Sukroni Sukroni Sukroni Sukroni, Sukroni Sunaryo Supriatun, Evi Suwahyo - Suwandi, Dedi Syaifurrahman, Arief Syarif Rohidayat Unggul Satria Jati Windy Stefani Zainuddin, Zainuddin