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All Journal Majalah Ilmiah MOMENTUM Majalah Teknik Mesin
Usman
Politeknik Industri Logam Morowali
Automotive Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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DESIGN AND SAFETY FACTOR SIMULATION OF AN AUTOMATED FEEDER FOR BLANKING MACHINES Usman; Wijayanto, Hendi Lilih; Zulfianti; Yusdianto; S, Hairun Apriadi Ramadhan; Usman
Media Mesin: Majalah Teknik Mesin Vol. 26 No. 2 (2025)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v26i2.6977

Abstract

The displacement of the stainless-steel plate to the printing work area is still managed manually by theoperator. Additionally, there is no clear benchmark to determine whether the plate is in the correct position andaligned according to the printed pattern. Thus, the print results are frequently less than perfect and require a longprocess. To address these conditions, an additional feeder is required with an automatic system that can operatein conjunction with the blanking machine, simplifying the operator's work and enhancing the blanking processefficiency. The objectives of this research are to determine the design of the feeder machine design by the needsand specifications of the machine, to discover the value of the safety factor of the Feeder machine design, and toreveal the movement system of the Feeder machine design using SolidWork 2019. This final project was carriedout in June 2023 at Politeknik Industri Logam Morowali (PILM) in Labota Village, Bahodopi District, MorowaliRegency, Central Sulawesi Province. The results show that: Researchers can make a design with the provisionsof a length of 550 mm and a width of 250 mm, while the known safety factor value for both areas is declared safesince it has Factor of Safety (FOS) value of 1 and the design movement system displayed on the animation systemin SolidWork 2019 software.
ANALISIS PERPINDAHAN PANAS KIT TAMBAL BAN PORTABLE TERHADAP VARIASI WAKTU PENAMBALAN Usman; Sentiyaki Sentiyaki; Dwi Nurhudaeni Abdullah
JURNAL ILMIAH MOMENTUM Vol 21 No 1 (2025): April
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v21i1.14152

Abstract

Motorcycles are the primary mode of transportation in Indonesia, with a total of 125,305,332 units recorded in 2022 according to the Central Bureau of Statistics. One of the common problems faced by riders is tire leakage, which can disrupt travel. This study aims to design a portable tire patching tool based on a heating element, utilizing a piston pump mechanism and powered by a motorcycle battery, compactly assembled to fit within the motorcycle’s luggage compartment. The research method employed is experimental, using a thermal imaging device to determine the optimal temperature range for melting the tire patch rubber. The results show that 2 minutes of heating produces a bonding strength of 45.7 Psi. Starting from an ambient temperature of 30 °C, the heating plate reached 139.5 °C, while the tire surface reached 118.3 °C. The total heat transfer energy generated was 3,845,356.8 Joules. The resulting patch adhesion effectiveness reached 70.4%. This tool is considered effective for use in areas with limited access to tire repair services and can be operated directly by riders to reduce the risk of unexpected expenses during travel.
EVALUASI DINAMIKA TITIK BERAT KURSI RODA PADA KEMIRINGAN JALAN 20° BERDASARKAN SIMULASI DAN PERHITUNGAN ANALITIS Usman; Faisal Habib; Hairun Apriadi Ramadhan; Angga Tegar Setiawan
JURNAL ILMIAH MOMENTUM Vol 21 No 2 (2025): Oktober 2025
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/mim.v21i2.14195

Abstract

According to data from Indonesia’s Central Statistics Agency (BPS) and the Ministry of Social Affairs [1,2], over 5.3 million individuals with physical disabilities face mobility challenges, particularly when using wheelchairs on sloped terrain. A major issue is the instability of manual wheelchairs on steep inclines, which increases the risk of tipping and requires assistance. This study aims to evaluate the dynamics of center of gravity (COG) shifts in wheelchairs on road slopes up to 20°, using simulation and analytical calculation methods. The methodology includes literature review, wheelchair type surveys, slope condition observations, and system kinematics and force analysis. Results show that the COG remains within a safe zone during slope transitions, with reaction force distribution remaining stable between 87.63 and 93.26 kg. Pressure on the front and rear wheels remains within safety limits, avoiding deformation or loss of traction. The highest power consumption recorded was 144.56 watts during ascent, which significantly decreased on flat or descending terrain. The findings suggest that the proposed wheelchair design is adaptive, safe, and energy-efficient, making it suitable for users with disabilities navigating urban environments with varied topography.
Studi Perencanaan Sistem Kelistrikan pada Gedung Data Center Mmr 4 Deltamas Cikarang Pusat Ishak Amar; I Wayan Wawan Mariki; Riyki Apriandi; Usman Haya
JURNAL ILMIAH MOMENTUM Vol 21 No 2 (2025): Oktober 2025
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/mim.v21i2.14841

Abstract

Studi ini menata ulang sistem perencanaan kelistrikan gedung Pusat Data MMR 4 Deltamas Cikarang, dengan fokus pada keselamatan dan kenyamanan operasional sesuai SNI, PUIL, dan peraturan kelistrikan. Penelitian diawali dengan wawancara dengan konsultan perencana untuk mendapatkan dimensi bangunan (panjang, lebar, tinggi) serta kebutuhan daya server dan sistem pendingin, dilanjutkan dengan penyesuaian desain instalasi pencahayaan dan kelistrikan. Peralatan pencahayaan terdiri dari berbagai jenis lampu downlight (5 W, 6 W, 10 W, 12 W, 18 W, 20 W) dan lampu TL (2x18 W dan 1x18 W), serta 7 titik stopkontak. Sistem pendingin meliputi unit AC ½ HP, ¾ HP, dan 2 HP. Perangkat daya besar meliputi PAC 5,5 kW, UPS 30 kVA, ATS 150 A, dan COS bermotor. Kabel yang digunakan adalah NYY (1,5–10 mm²), NYA (1,5–2,5 mm²), dan NYGBY (50 mm²); proteksi disediakan oleh MCB (2–10 A) dan MCCB (16–125 A). Total kebutuhan daya mencapai sekitar 72,1 kW. Sumber daya utama adalah PLN 82,5 kVA (dua saluran), dengan dua generator cadangan masing-masing 100 kVA yang siap menggantikan jika terjadi pemadaman listrik. Kata kunci: Pusat Data, Sistem Tenaga, UPS, peralatan listrik.
PENINGKATAN KINERJA TERMAL ALAT PENGERING JAGUNG BERBASIS KOLEKTOR SURYA DENGAN MODIFIKASI GEOMETRI PELAT ABSORBER BERGELOMBANG Usman; Mahmuddin; Ishak Amar; Hendi Lilih Wijayanto; Muhammad Alfian
JURNAL ILMIAH MOMENTUM Vol 22 No 1 (2026): Vol.22, No.1 (2026)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v22i1.15437

Abstract

Modifikasi geometri pelat absorber merupakan salah satu pendekatan strategis untuk meningkatkan perpindahan panas pada kolektor surya, namun kajian eksperimental yang membandingkan secara langsung pengaruh bentuk gelombang segi empat dan setengah lingkaran terhadap kinerja sistem pengering jagung masih sangat terbatas. Penelitian ini bertujuan menganalisis pengaruh geometri pelat absorber bergelombang segi empat dan setengah lingkaran terhadap kinerja termal kolektor dan performa pengeringan jagung menggunakan metode eksperimental langsung (direct experimental method) di bawah kondisi radiasi matahari alami. Pengujian dilakukan terhadap 6 kg jagung dengan kadar air awal 25,5% (basis basah) selama 360 menit, dengan interval pengamatan setiap 45 menit. Parameter yang dianalisis meliputi penurunan kadar air, kecepatan udara, laju aliran massa udara (ṁa), energi panas berguna (QU), dan efisiensi termal kolektor (ηth). Efisiensi termal tertinggi dicapai pada interval pengeringan menit ke-225, yaitu sebesar 39,8% untuk pelat segi empat dan 32% untuk pelat setengah lingkaran. Hasil menunjukkan bahwa pelat absorber segi empat memberikan kinerja lebih baik dibandingkan setengah lingkaran: kadar air akhir yang dicapai sebesar 9,2% berbanding 10,8%; kecepatan udara maksimum masing-masing 0,9 m/s dan 0,8 m/s. Peningkatan performa ini dipengaruhi oleh luas permukaan efektif yang lebih besar serta turbulensi aliran yang lebih tinggi pada geometri segi empat, sehingga optimasi geometri absorber terbukti meningkatkan efektivitas sistem pengering surya.
Co-Authors Angga Tegar Setiawan Dwi Nurhudaeni Abdullah Faisal Habib Hairun Apriadi Ramadhan Hendi Lilih Wijayanto I Wayan Wawan Mariki Ishak Amar Ishak Amar Mahmuddin Muhammad Alfian Riyki Apriandi S, Hairun Apriadi Ramadhan Sentiyaki Sentiyaki Usman Yusdianto Zulfianti