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All Journal MACHINERY: Jurnal Teknologi Terapan
Ahmad Zamheri
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Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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ANALISIS KEAUSAN, KOEFISIEN GESEK DAN KONDUKTIVITAS TERMAL KAMPAS REM TROMOL PADA SEPEDA MOTOR BERBAHAN KOMPOSIT KULIT KOPI DAN MgO Amelia Gustiani; Sailon; Ahmad Zamheri
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 2 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.12738725

Abstract

Peningkatan limbah kulit kopi akan menimbulkan dampak buruk bagi lingkungan jika tidak dikelola dengan baik. Salah satu cara dalam mengurangi limbah kulit kopi yaitu dengan memanfaatkan limbah kulit kopi sebagai bahan campuran dalam pembuatan kampas rem. Pembuatan kampas rem dilakukan dengan variasi komposisi dengan resin epoxy sebagai variable tetap serta kulit kopi dan MgO sebagai variable bebasnya dimana variasinya 40%:20%, 30%:30%, 20%:40%. Kemudian sampel kampas rem dilakukan pengujian keausan, koefisien gesek dan konduktivitas termal. Dari pengujian tersebut didapatkan hasil terbaik pada keausan kering dan basah pada variasi komposisi kulit kopi 20% dengan nilai 6,615 x 10-4 mm2/kg.m.dan 4,760 x 10-4 mm2/kg.m, pada pengujian koefosoen gesek dan konduktivitas termal mendapatkan nilai terbaik pada komposisi kulit kopi 40% dengan nilai 0,58666667 dan 0,1569145 𝑊/𝑚.ᵒK.
T TEKNOLOGI PENYANGRAI BIJI KOPI DENGAN ALAT UKUR MASSA SISTEM DIGITAL BERBASIS MIKROKONTROLER ARDUINO Surya Palas; Sailon, Sailon; Ahmad Zamheri
MACHINERY Jurnal Teknologi Terapan Vol. 5 No. 3 (2024): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.14242120

Abstract

Roasting coffee is a crucial process to produce high-quality coffee beans. However, the coffee roasting process is still often done manually. To address this issue, an automatic coffee roasting machine has been designed using various components such as Arduino Mega as the main controller, MLX 90614 sensor to measure temperature, load cell sensor to track the weight of coffee beans, DC motor as the coffee bean agitator, and LPG as the heating source for the roasting chamber. The research has shown that the coffee roasting machine functions well. Testing of the machine indicates that the heating temperature inside the roasting chamber can reach 150°C in an average time of 6.52 minutes. The load cell sensor has an accuracy rate of 99.5%, while the temperature sensor has an accuracy rate of 98.6%. With this automatic coffee roasting machine, it is expected to improve the efficiency of coffee roasting on a household scale. The machine allows for better temperature control and stable agitation, thereby helping to enhance the quality and production efficiency of coffee
Co-Authors Amelia Gustiani Sailon Sailon, Sailon Surya Palas