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Nasrul Ilminnafik
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ROTOR: JURNAL ILMIAH TEKNIK MESIN
Published by Universitas Jember
ISSN : 1979018x     EISSN : 24600385     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
ROTOR merupakan jurnal yang diterbitkan oleh Jurusan Teknik Mesin Universitas Jember yang memuat artikel ilmiah dalam bidang Konversi Energi, Design/Perancangan, Teknik Produksi, Material serta bidang lain yang terkait dengan Teknik Mesin. Semua naskah yang diterima ROTOR diterbitkan secara global dalam bentuk elektronik. Hasil penelitian yang diterbitkan dalam jurnal ini diharapkan dapat menambah khasanah pengetahuan di bidang Teknik Mesin serta menjadikan sarana bagi para profesional baik dari dunia usaha, pendidikan, ataupun peneliti untuk menyebarluaskan perkembangan ilmu pengetahuan dan teknologi di bidang Teknik Mesin melalui publikasi hasil penelitian.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 333 Documents
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STUDY OF INFLUENCE TIME IN THE IMPROVEMENT OF NICKEL CONTENTS ON LIMONITE PROCESSING USING NAOH Rini Riastuti; Kautsar Muwahhid; Ahmad Maksum; Johny Wahyuadi Soedarsono; Mhd. Ibkar Yusran Asfar
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.34326

Abstract

Logam nikel didominasi oleh bijih sulfida, namun 70% sumber nikel dunia adalah bijih laterit, yang hanya menyumbang 40% dari output nikel dunia. Menanggapi kenaikan permintaan dan penurunan deposit nikel sulfida, pemurnian nikel bijih laterit dan teknik produksi hidrometalurgi untuk bijih laterit semakin intensif. Silikon dapat diekstraksi dari bijih nikel laterit dengan NaOH. Berbagai penelitian menunjukkan bahwa metode ini dapat meningkatkan kandungan nikel dari residu pelindian, memungkinkan limbah sisa untuk digunakan kembali dan mengurangi dampak lingkungannya. Penelitian ini bertujuan untuk mengetahui apakah mekanisme pengendapan dapat secara efektif memisahkan nikel dan kobalt dari pengotor lainnya. Limonit dilindi menggunakan larutan NaOH dengan konsentrasi 60 g/L. Durasi pelindian bervariasi antara 30, 60, 90, dan 120 menit. Pengaruh NaOH sebagai larutan pelindian diselidiki dengan pengujian XRD dan AAS. Hasil dari analisis XRD menunjukkan proses pelindian menggunakan NaOH membentuk fasa nikel dan kobalt oksida dan hidroksida dari goetit dan NaOH, dengan fasa lain pada residu pelindian terbentuk seiring dengan bertambahnya waktu pelindian. Pengujian AAS menunjukkan nilai perolehan nikel negatif yang dapat dihasilkan oleh kontaminan pada sampel awal, pelarutan ion nikel, dan kopresipitasi, dimana ion nikel diserap ke dalam fase besi hidroksida. Selain itu, uji AAS juga menunjukkan nilai perolehan kembali kobalt pada waktu pelindian 30 menit adalah 1,41%, yang berarti bahwa waktu tersebut adalah waktu optimum untuk pelindian kobalt. Sedangkan waktu yang melebihi 30 menit dapat menurunkan kadar kobalt karena pengenceran ulang dan pengendapan bersama.
ANALISIS KINERJA MESIN AMG CNC PLATE CUTTING MENGGUNAKAN METODE OEE (OVERALL EQUIPMENT EFFECTIVENESS) Dwika Daffa Ashari; Viktor Naubnome; Najmudin Fauji
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.32408

Abstract

In the industrial world, technology is an important thing that can help improve the quality of the industry. Every company that uses technology definitely needs an adequate maintenance system for tools and machines. The purpose of maintenance is to prevent unexpected machine breakdowns that can result in the production process stopping, endangering worker safety and increasing machine repair costs. One of the machines that are often used in the production process at PT XYZ is the AMG CNC plate cutting machine. Therefore, one method to determine the effectiveness of a cutting machine is Overall Equipment Effectiveness (OEE). Overall Equipment Effectiveness is a measurement made on performance related to the availability of process productivity and quality. As a result, by applying the OEE (Overall Equipment Effectiveness) method for performance analysis of the AMG CNC plate cutting machine, we can find out the value for availability of 91%, performance efficiency of 96%, and rate of quality product of 99%, the measurement results of the AMG CNC plate machine cutting in January 2021 using the OEE method of 86% which has passed the value of the OEE world standard of 85%. the value of the six big losses obtained is the breakdown loss value of 1.8%, the set up and adjustment value of 10%, the idle and minor stoppage value of 3%, the value of reduce speed losses of 5.3%, the value of process defect losses of 1 ,1%, the value of reduce yield losses is 0.06%.
AKURASI MESIN CNC ROUTER LOW BUDGET BERBASIS MACH 3 Puguh Elmiawan; Dharmanto Dharmanto; Adik S.W; M Fazalul M; Arief R
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.34645

Abstract

This paper discusses the building of a low-cost CNC router machine. In designing a CNC machine using an electrical actuator as the driving force, we use a nema 23 stepper motor combined with a pitch 2 mm timing belt to drive the machine on the x and y axes. On the z-axis, we use a stepper motor and a linear screw to drive the machine. This machine is often used to cut and engrave wood, acrylic, and PCB objects. The design drawing that has been made on the PC is sent to the microcontroller using serial communication, then the CNC performs work on the thing according to the coordinates. The spindle will create a pattern on the thing automatically according to the design drawing. Measurement was made using a caliper with an accuracy of 0.05 mm. This CNC machine is performing duly as ordered by the mach3 micro controller. The machine test results show an accuracy value of 99.85% on the x-axis, 99.74% on the y-axis, and 99.12% on the z-axis.
SIMULASI BEBAN RANGKA PADA MESIN PENGGILING SEKAM PADI MENGGUNAKAN PERANGKAT LUNAK Muhammad Alfarhan Ficki; Kardiman Kardiman; Najmudin Fauji
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.32447

Abstract

One of the main components in the rice husk grinding machine is the frame. The frame is the most important fundamental part, especially for use in machinery, because the function of the frame is as a support for the components themselves, and is able to withstand axial, normal and moment forces to maintain stability in the machine. The strength of the frame depends on the shape or type of construction which is able to withstand torsional loading from the engine and also withstand the shock that is given when the engine moves. So the purpose of this study is to find out how to simulate the loading of the frame on a rice husk grinding machine using SolidWorks software, and to know the comparison of theoretical calculations and simulations for 3 material variations on the frame of a rice husk grinding machine in a static state. The method used is the Finite Element Method (MEH), MEH with software can determine the loading points. From this test, researchers can find out which points have a minimum load, a medium load, and a maximum load. The results of the analysis provide the safety value of original and processed materials, changes in materials can be concluded which material is more ideal. The results of this study are that among AISI 1010, ASTM A36, and AISI 1045 materials, the best material is AISI 1045 material because it has the greatest safety factor value of 12.15.
CHARACTERIZATION OF SALAK WEDI ACTIVATED CARBON STRUCTURE USING KOH AND ZnCl2 ACTIVATOR Aprillia Dwi Ardianti; Rizka Nur Faila
ROTOR Vol 16 No 1 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i1.35250

Abstract

Activated carbon can be made from a variety of organic and inorganic raw materials. One of the organic materials with great potential in the manufacture of activated carbon is the bark of salak wedi(Salacca Zalacca). The purpose of this study was to determine the physical characteristics of the activated carbon of salak wedi peel which has been chemically activated using KOH and ZnCl2 with the process of being activated once using only KOH or ZnCl2 and multilevel activation using a combination of KOH and ZnCl2 to determine the number of pores in the sample and to determine the presence of a crystal structure in the sample. The research method includes sample making, single and multilevel activation processes, then SEM and XRD tests are carried out. The results of SEM with multilevel activation have more pores than the activated carbon sample of bark once. The SEM results obtained that the multilevel activation has a larger number of pores compared to the activation which is only carried out once, with the result that the largest pore volume with the stratified activator Carbon KOH + ZnCl2 (s) is 35,976,798,714 nm3. The XRD analysis indicated that activated carbon from the bark of salak wedi is a material with good conductivity properties because it has a relatively high crystalline structure, both on one-time activation and multilevel activation. Time using KOH activator obtained phase crystalline with the most significant percentage if compared with another activation.
PERFORMANCE ANALYSIS OF THE ELECTRIC TROLLEY OF OXYGEN CYLINDERS BASED ON THE ROAD SLOPE Costantinus Oei; Maran Gultom; Obet Takke Ranteallo; Thobby Wakarmamu; Marthen Liga; Endang Hartiningsih; Johni Jonatan Numberi; Akbar Silo
ROTOR Vol 16 No 1 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i1.40522

Abstract

The demand for efficient distribution of oxygen cylinders at Abepura Regional General Hospital (RSUD Abepura) has been steadily increasing due to the growing needs of staff members and patients who expect high-quality service within the hospital premises. In response to this demand, this study aims to propose a transportation system that is not only automated but also time-saving, with the ultimate goal of enhancing medical services in a more efficient, eco-friendly, and safe manner. One of the main challenges faced in the distribution process is the hilly terrain surrounding RSUD Abepura. The presence of these hills makes it difficult to manually distribute the heavy 72 kg gas cylinders, which is the current method employed at the hospital. To overcome this challenge, this research suggests implementing an innovative solution—an electric trolley—that can effectively facilitate the distribution and flow of oxygen cylinders at RSUD Abepura. The findings of this study conclusively demonstrate that the electric trolley is not only a suitable but also a convenient solution for the operators and medical staff involved in the distribution process. By utilizing the electric trolley, they can distribute oxygen cylinders without facing any hindrances posed by the uphill roads, ultimately resulting in significantly improved time efficiency and service effectiveness at RSUD Abepura.
IMPACT OF NANOPARTICLES AS A HOMOGENEOUS CATALYST IN IGNITION CHARACTERISTICS OF WASTE PLASTIC OIL Suyatno Suyatno
ROTOR Vol 16 No 1 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i1.41121

Abstract

A novel approach was employed to develop alternative fuels by blending pyro-oil from used plastic with graphene, which acted as a combustion additive. The biofuels were produced through pyrolysis of high-density polyethylene (HDPE). When evaluating the fuel blends, the fuel properties were analyzed and compared to commercially available diesel fuel, while Fourier transform infrared (FTIR) spectrometry was employed to know the fuel character. The findings demonstrate that including graphene as a combustion additive significantly enhances the Fuel's performance. The phenomena suggest that graphene effectively weakens the dispersion forces among the triglyceride molecules. Consequently, the droplet is easier to burn. By incorporating graphene, the alternative fuels droplet exhibits improved ignition properties, offering potential benefits in terms of efficiency and performance. The additive plays a crucial part in modifying the molecular structure of the Fuel, resulting in enhanced reactivity and ignition characteristics. Furthermore, the analysis of physical properties and spectroscopic data provides valuable insights into alternative fuels' molecular composition and behavior.
ENHANCE THE HEAT AND FLAME CHARACTERISTICS OF SAGO BRIQUETTES WITH AND WITHOUT ADJUSTERS Suyatno Suyatno; Helen Riupassa
ROTOR Vol 16 No 1 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i1.41117

Abstract

Experimental investigations were conducted to assess the impact of an adjuster on the heating efficiency and flame stability of sago waste briquettes. The adjuster was introduced to maintain a consistent burning distance, thereby enhancing the combustion heat of the fuel. Infrared thermometry was employed to monitor the temperature evolution within the briquette and the combustion load, represented by water in a pan. The findings demonstrate that adding an effective adjuster significantly improves the performance of both the briquettes and the stove, resulting in enhanced effectiveness and efficiency. This is evident from the observed increase in combustion temperature and faster boiling time of the water. The consistent burning distance ensures a stable and uniform heat supply to the briquettes, facilitating more efficient fuel utilization as all parts of the fuel can undergo complete combustion and transfer heat to the pan. Molecular analysis reveals that the stability of the burning distance weakens the Van der Waals bonds within the carbon chain, thereby increasing the reactivity of the fuel molecules. Consequently, the fuel exhibits improved heat absorption capability and becomes highly combustible.
ANALYSIS OF THE EFFECT OF BILGE KEEL ON THE ROLLING MOTION OF RO-RO FERRY SHIP USING THE STRIP-THEORY METHOD Ramli Firdaus Kusnadi; Puranggo Ganjar Widityo; Ahmad Yasim; Baharuddin Ali
ROTOR Vol 16 No 1 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i1.32774

Abstract

Ships are a mode of transportation that is often used by the community as a link between the islands. People generally use the ferry as a mode of crossing in addition to the economical price but also comfort is still preferred. But in recent years, researchers have often heard cases of shipwrecks. Especially ship crossing accidents caused by overturned ships. Based on this, prevention is needed to reduce the number of ship accidents in the future. One of the keys that can be taken is to improve the technical analysis before the ship is designed. One such analysis related to the ship is seakeeping ship. The method used in this study is to use strip – theory method through OSM program. This method is one of the commonly used methods because it calculates the 3D model into 2D. The results showed the effect of the use of Bilge keel on the ferry Ro-Ro tested with conditions x0, x1, x2, and x3 on the condition of the stationary ship with a wave height of 1,5 m and heading 90o. The addition of Bilge keel is able to reduce the resonance of roll motion up to 58% in conditions of variation x1, 61% in variation x2, and 67% in conditions of variation x2. Therefore, the installation of bilge keel has a significant effect on the rolling of ferry Ro-Ro.
STATIC LOADING ANALYSIS ON THREE-WHEELED ELECTRIC VEHICLE FRAME USING SOLIDWORKS Azhar, Faruq Avero; Suranto, Dwi Djoko; Zain, Alex Taufiqurrohman; Karimah, Cahyaning Nur; Tyagita, Dicky Adi; Pratama, Aditya Wahyu; Sulistiono, Dety Oktavia; Nuruddin, Mochammad; Nari, Mochammad Irwan
ROTOR Vol 16 No 2 (2023)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v16i2.44222

Abstract

Analisis menggunakan metode Finite Element menghasilkan data secara menyeluruh dan detail. Respon fisik sistem terhadap beban di beberapa titik mampu terbaca. Hal tersebut sangat berguna dibidang engineering, terutama pada kendaraan dan analisis struktur. Penelitian ini bertujuan untuk mencari nilai tegangan, regangan maksimal serta displacement dengan pembebanan statis dari struktur rangka pad akendaraan listrik roda tiga. Kendaraan listrik roda tiga yang digynakan diharapkan memiliki kapasitas beban angkut yang besar sehingga simulasi ini sangat diperlukan. Hasil simulasi menunjukkan bahwa nilai tegangan maksimum pada rangka sasis ketika diberi beban 1500 N adalah 0,0244 MPa serta 5,26×10-13 dan 1,27×10-7 untuk regangan minimum dan maksimum. Sedangkan nilai displacement yang didapat adalah 6,208×10-4 mm. Dari hasil tersebut dapat dismpulkan bahwa struktur rangka sudah cukup baik dalam menahan beban yang diberikan.

Page 32 of 34 | Total Record : 333

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