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All Journal Teknika: Jurnal Sains dan Teknologi Infotekmesin APTEK Madani : Indonesian Journal of Civil Society Accurate: Journal of Mechanical Engineering and Science Journal of Community Development Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim JURNAL INOVASI TEKNIK INDUSTRI Pengabdian: Jurnal Abdimas
Unggul Satria Jati
Politeknik Negeri Cilacap
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences

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Analisis Pengaruh Variasi Suhu Tempering Pada Sifat Mekanik Baja ASTM A36 Setelah Pengelasan SMAW Menggunakan Elektroda E 7016 Leo Van Gunawan; Puger Satya Andika; Tito Endramawan; Emin Haris; Casiman Sukardi; Unggul Satria Jati
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 Unggul Satria Jati; Dian Prabowo; Hety Dwi Hastuti; Leo Van Gunawan
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.
Pengaruh Variasi Pendinginan Terhadap Kekasaran Permukaan Hasil Proses Milling Pada Material Stainless Steel AISI 304 Unggul Satria Jati; Dian Prabowo; Hety Dwi Hastuti
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2371

Abstract

Machining processes in current developments are required to be more environmentally friendly, the use of coolant has a big impact on the environment. So air cooling media is an alternative that can be used to reduce production costs and implement environmentally friendly machining processes. This research aims to determine the level of surface roughness on AISI 304 Stainless Steel at depth of feed and cooling medium. There are two independent variables and a dependent variable. The dependent variable is cutting speed 63 mm/min and feed speed 950 mm/min, while the independent variable is variation. cooling media (room air, dromus, and cooled air) and variations in feeding depth (0.5, 0.75 and 1 mm. The results obtained from this test show the influence of variations in cooling media and depth of feed on the surface roughness of Stainless Steel AISI 304. The tools and materials used are Stainless Steel AISI 304, milling machine, dromus, cold air cooler, thermometer, pressure gauge, and tools. surface roughness tester. Tests obtained the greatest roughness results in the cooling medium using room air which showed a roughness level of 0.974 μm with a cutting speed of 63 mm per min and a feed speed of 950 mm per min. Then the smallest level of roughness is in the cooling media using cold air, namely 0.296 μm with a cutting speed of 63 mm per min and a feed speed of 950 mm per min.
Pelatihan Pengolahan Limbah Kayu Mahoni (Swietenia Mahagoni) Pada BUMDes Banjarwaru Radhi Ariawan; Nur Akhlis Sarihidaya Laksana; Unggul Satria Jati; Roy Aries Permana Tarigan; Bayu Aji Girawan; Linda Perdana Wanti; Nur Wachid Adi Prasetya; Ganjar Ndaru Ikhtiagung
Journal of Community Development Vol. 5 No. 2 (2024): December
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/comdev.v5i2.258

Abstract

Banjarwaru village is one of the villages in Cilacap district with the potential for wooden broom handle craft commodities. The processing of mahogany wood (Swietenia mahagoni) into broom handles produces wood waste that has not been utilized optimally. The accumulation of wood waste is caused by a lack of knowledge among the Banjarwaru village woodworking community regarding the potential dangers, benefits, and economic value of wood waste. Therefore, training in wood waste processing into value-added products such as particleboard is needed. The Community service team together with BUMDes Banjarwaru carried out mentoring activities as a solution method for utilizing wood waste. The mentoring activities carried out consist of educating the negative effects of wood waste on the environment, educating the potential and benefits of wood waste in another processed forms, and training in wood waste processing into particleboard. These series of activities succeeded in increasing the woodworking community understanding of wood waste by 81.6%. The success rate of mentoring reached 91,67% shown by 11 out of 12 mentoring participants understood the potential danger, benefits, and other processed forms of wood waste.
Peningkatan Produktivitas Peternak Kambing Melalui Inovasi Pakan Fermentasi dan Manajemen Kesehatan Ternak pada KUB Berkah Lestari Jenal Sodikin; Unggul Satria Jati; Ari Kristiningsih; Khoeruddin Wittriansyah
Madani : Indonesian Journal of Civil Society Vol. 8 No. 1 (2026): Madani : Februari 2026
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/madani.v8i1.3151

Abstract

Livestock management has a strategic role in Indonesia, especially in goat farming, which is widely developed by local communities. However, the livestock feed currently used is still not processed effectively because it mainly consists of fresh green grass and is highly dependent on seasonal conditions. This situation can affect animal growth and the quality of goat production. Therefore, innovation in feed processing and improvement of product quality management are urgently needed. The purpose of this community service program is to implement fermented feed innovation and provide training on livestock health management for farmer groups. The implementation method includes counseling, training, demonstration of fermented feed production, training on sanitation and animal health management, and monitoring for six weeks. The program results show an increase in livestock weight by 19.1%, a reduction in feed costs by 24.1%, an improvement in feed conversion efficiency (FCR) by 21%, and an increase in farmers’ income by 29.2%. This program has proven to be effective in improving livestock productivity and supporting the sustainable welfare of farmers.
Pengaruh Suhu Pemanas Pada Mesin Pengering Cocopeat Tipe Rotary Dryer Unggul Satria Jati; Nur Akhlis Sarihidaya Laksana; Dian Prabowo; Nur Indah Wardani; Prastiyo Kurniyanto; Bryan Dwi Fauzi
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2833

Abstract

The rotary dryer is a machine designed to simplify the cocopeat drying process. The current process still relies on sunlight; this drying process has the drawback of longer drying times and uncontrolled moisture content. The maximum moisture content of the cocopeat must be 15%. This research method is an experiment using several parameters: a drum speed of 6 rpm, heating temperatures of 600°C, 900°C, and 1300°C, with varying drying times of 120 and 150 minutes. The drying process at a temperature of 600 °C resulted in a decrease in humidity efficiency of up to 56.7% with a water content value of 23.8% in 150 minutes and a mass of 3.7 kg. Meanwhile, for drying at a temperature of 1300 °C, the best reduction in efficiency was obtained compared to the previous temperature, a decrease in water content of up to 84% with a water content value of 8.55 and a mass of 2.7 kg using a time of 150 minutes.
Pengembangan Pelet Komposit Biomassa-Cangkang Kerang sebagai Bahan Bakar dan Bahan Baku Alternatif untuk Co-processing Semen Dian Prabowo; Nur Indah Wardani; Unggul Satria Jati; Andika Prastya; Ali Basroh
Infotekmesin Vol 17 No 1 (2026): Infotekmesin: Januari 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v17i1.2972

Abstract

This study evaluates Biomass-Shell Composite Fuel (BSCF) from lignocellulosic and seashell waste via fermentation and densification. Results show pellet moisture (2.64–11.0%) meets ISO 17225-6:2021 standards. The highest heating value was 12.11 MJ/kg in the mixed variant, though it was below the 14.5 MJ/kg minimum. Bulk density (0.12–0.37 g/cm³) and length (33–50 mm) were also below ideal standards. Incorporating seashells caused high ash content (32.16–34.84%). Consequently, BSCF pellets are recommended as an Alternative Fuel and Raw Material (AFR) for the cement industry, where mineral residues can substitute for limestone in clinker production. Optimization requires increased compaction pressure and reduced particle size to improve product efficiency.
Wood Waste Crushing Machine Training at BUMDes Banjarwaru Sejahtera Linda Perdana Wanti; Nur Akhlis Sarihidaya Laksana; Unggul Satria Jati; Roy Aries Permana Tarigan; Bayu Aji Girawan; Radhi Ariawan; Nur Wachid Adi Prasetya; Ganjar Ndaru Ikhtiagung
Pengabdian: Jurnal Abdimas Vol. 2 No. 3 (2024)
Publisher : Yayasan Adra Karima Hubbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70177/abdimas.v2i3.847

Abstract

Background. BUMDes Banjarwaru Sejahtera is a business owned and managed by the people of Banjarwaru Village, Cilacap Regency. Some of the businesses that have been managed by BUMDes Banjarwaru Sejahtera include renting molen machines and making handicrafts such as broom handles and woven bamboo household crafts which produce an abundance of wood waste left over from the production process. So far, this wood waste has been sold to tofu craftsmen as fuel for the tofu production process. Purpose. People can use wood waste as added value by processing wood waste into handicrafts that have high economic value so that they can improve the welfare of the people of Banjarwaru village. Through this community service activity, training will be held on the use of wood waste chopping machines so that processed wood waste can be made into handicrafts such as particle boards or other handicrafts. Method. The method used is a lecture method where the community service team who are lecturers at the Cilacap State Polytechnic provide training on the use of wood waste chopping machines to members of BUMDes Banjarwaru Sejahtera and several wood craftsmen in Banjarwaru village. Results. The results of this community service activity have had a positive impact on business development at BUMDes Banjarwaru Sejahtera. Conclusion. Through this community service activity, it can be concluded that this activity has had a positive impact on the business development of BUMDes Banjarwaru Sejahtera. Apart from this, training in the use of wood waste chopping machines can also increase the competence of wood craftsmen in Banjarwaru village so they can produce more varied crafts made from wood waste.
PERANCANGAN MESIN RICE TRANSPLANTER UNTUK PADI JENIS JAJAR LEGOWO MENGGUNAKAN METODE VDI 2222 Jetma Sabilla Sabilla; Nur Akhlis Sarihidaya Laksana; Jenal Sodikin; Ulikaryani; Unggul Satria Jati; Ghia Pisti Cikarge
Accurate: Journal of Mechanical Engineering and Science Vol. 7 No. 1 (2026): April 2026
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/apcv6z23

Abstract

Agricultural mechanization is a key strategy for boosting rice cultivation productivity while addressing labor shortages in the agricultural sector. However, most rice transplanters used in Indonesia are imported products that do not fully align with local paddy field characteristics and entail relatively high investment costs. This study aims to analyze the design process of a rice transplanter tailored for the jajar legowo planting system, utilizing the VDI 2222 method and SolidWorks-based 3D modeling. The analysis covered user requirements, design concept selection, machine dimensions, seedling tray configuration, the *jajar legowo* planting system, and material selection. The results indicate that the optimal design concept features a six-row planting configuration with a frame size of 1085 mm × 1472.6 mm, six seedling trays measuring 218 mm × 600 mm, and a material combination of galvanized steel and stainless steel—balancing structural strength, corrosion resistance, ease of manufacturing, and cost-efficiency. Implementing the jajar legowo system with a planting distance of approximately 20 cm is considered conducive to planting efficiency and compatible with rice cultivation practices in Indonesia. Overall, the design process yielded a rice transplanter model with the potential to be developed into a functional prototype, serving as a more economical local alternative that meets the specific needs of Indonesian farmers.
Studi Potensi Pembangkit Listrik Tenaga Bayu (PLTB) di Pantai Teluk Penyu Cilacap Menggunakan Analisis Distribusi Weibull Ulikaryani Ulikaryani; Agus Santoso; Bayu Aji Girawan; Radhi Ariawan; Unggul Satria Jati; Jenal Sodikin; Ari Kristiningsih
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.5092

Abstract

The ever-increasing demand for electrical energy drives the utilization of renewable energy as a sustainable alternative source. Wind energy is one such potential renewable energy source. As a region situated on the southern coast of Java, Cilacap Regency possesses relatively stable wind characteristics, making it a promising location for the development of wind power plants. This study aims to analyze the wind energy potential in the Cilacap region using the Weibull distribution. The Weibull method was employed to determine the shape parameter (k) and scale parameter (c) based on wind speed data. The analysis results indicate an average wind speed of 6.225 m/s in the Cilacap region especially Teluk Penyu Beach, with Weibull parameters of k = 2.972 and c = 6.973 m/s. These values ​​reflect wind characteristics that are relatively stable and favorable for the development of small- to medium-scale wind power plants. The calculated wind power density (WPD) indicates that the coastal area of ​​Cilacap is suitable for harnessing wind energy as an alternative energy source.
Co-Authors Agus Santoso Ali Basroh Andika Prastya Anjar Kustiawan Anwar Nurharyanto Ari Kristiningsih Augustinus Sujono Bayu Aji Girawan Bryan Dwi Fauzi Casiman Sukardi Dian Prabowo Didik D Susilo Ganjar Ndaru Ikhtiagung Ghia Pisti Cikarge Halim, Dimas Ardiansyah Haris, Emin Hety Dwi Hastuti Jenal Sodikin Jetma Sabilla Sabilla Leo Van Gunawan Linda Perdana Wanti Nur Akhlis Sarihidaya Laksana Nur Indah Wardani Nur Wachid Adi Prasetya Prastiyo Kurniyanto Probo Hardini Puger Satya Andika Radhi Ariawan Roy Aries Permana Tarigan Suripto, Heri Ulikaryani, Ulikaryani Windra Jaya Wittriansyah, Khoeruddin