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S, Nanang
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Desain dan Implementasi Fraction Collector Menggunakan MCs 51 Ramdan, Ade; Sutarlan, Elan; Gojali, Elli A.; S, Nanang
INKOM Journal Vol 6, No 1 (2012)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (357.292 KB) | DOI: 10.14203/j.inkom.168

Abstract

 This paper presents a design and an implementation of a chemical laboratory equipment which serves to collect automatically liquid droplets from a column in the chromatography colomn. This equipment uses MCs 51 family for setting hatching time, displaying hatching counter, and moving the dropper in X and Y axes. Two stepper motors are used to fill 225 tubs with each volume is 15 ml. Therefore, we have a Fraction Collector. The results shows that our system works well, all droplets occurs in the middle of the tube, and the time for transfering a dropler  from one tube to another time is 6.5 seconds.Keywords: chromatography colomn, MCs51 controller, test tube, Fraction Collector. Tulisan ini membahas mengenai desain dan pembuatan Fraction Collector yaitu peralatan laboratorium kimia yang berfungsi untuk menampung tetesan cairan yang keluar dari suatu kolom pada proses kromatografi kolom secara otomatis. Alat ini dilengkapi sebuah pengendali mikrokontroler MCs 51 untuk mengatur dan menampilkan lamanya waktu penetesan, juga menggerakkan penetes ke arah sumbu X dan Y oleh dua buah motor stepper untuk mengisi 225 tabung reaksi yang masing-masing berukuran 15 ml. Hasil pengujian sistem bekerja dengan baik, tetesan terjadi ditengah-tengah tabung dan rata-rata waktu yang dibutuhkan untuk perpindahan penetes dari satu tabung ke tabung berikutnya adalah 6.5 detik.  Kata kunci: Fraction Collector, kromatografi kolom, pengendali MCs 51, tabung reaksi  
New Tire Usage Efficiency by Increasing Lifetime Tyre Size 11.00R20 in DT Coal Hauling units in the Mining area of PT. Antareja Mahada Makmur Site PT MIFA Bersaudara Period (2024) S, Nanang; S.W, Fiqh'ya; T., Reka; S, Jekson; N., Ruli
Journal of World Science Vol. 4 No. 6 (2025): Journal of World Science
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jws.v4i6.1452

Abstract

Tires represent the third-largest operational cost after fuel and maintenance in mining operations and contribute significantly to environmental waste. At PT Mahada Makmur, particularly at the MIFA jobsite, the 11.00R20 bias tire installed on the AXOR2528-CH hauling unit was observed to have suboptimal performance. This unit plays a critical role in coal transportation from the crusher to the port or power plant and has been modified (upsized) to carry loads up to 30 tons, exceeding the original design capacity of 20 tons. The research problem centers on the rapid wear and reduced lifespan of the bias tires under increased load conditions. The objective of this study is to identify the dominant factors affecting tire performance and propose an effective strategy to extend tire life. Using a three-month field observation method, the study evaluated the tire’s operational conditions and categorized influencing variables into maintenance, mechanical, operational, and product factors. Results indicated that operational factors, such as overloading and improper driving behavior, were the main contributors to premature tire wear. As a strategic solution, the study recommends tire standardization in accordance with actual load capacity and eliminating operational inefficiencies. The implication of this research is the potential for reduced tire costs, improved operational safety, and minimized environmental impact through more sustainable tire management practices.
Co-Authors Ade Ramdan Gojali, Elli A. N., Ruli S, Jekson S.W, Fiqh'ya Sutarlan, Elan T., Reka