Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics)
Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) is a scientific journal in the field of mechanical engineering and mechatronics. It publishes scientific articles on pure and applied research, as well as overviews of developments in theory, methods, and related applied sciences. JMEM is published by the Mechanical Engineering Study Program, Faculty of Engineering, President University, Cikarang, West Java, Indonesia. Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) is a peer-reviewed, open-access journal that facilitates the dissemination of academics, researchers, and practitioners in mechanical engineering and related fields. The Journal of Mechanical Engineering and Mechatronics accepts submissions from around the world, especially from Indonesia. All articles submitted to this journal can be written in English. Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) has been indexed in Garba Rujukan Digital (GARUDA), PKP Index, Crossref, ISSN, and Google Scholar. Calls for Paper JMEM
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ANALYSIS OF SURFACE ROUGHNESS OF POLYTETRAFLUOROETHYLENE (PTFE) MATERIAL IN THEÂ TURNINGÂ PROCESS
Abstrak: Proses pembubutan merupakan proses penghilanngan sebagian material benda kerja dengan menggunakan pahat bubut. Seringkali hasil pembubutan tersebut menimbulkan goresan yang menyebabkan kekasaran permukaan. Kekasaran permukaan tersebut merupakan salah satu indikator dalam menentukan kwalitas hasil proses. Jika nilainya semakin kecil maka kekasaran permukaan benda kerja yang dihasilkan adalah baik, demikian pula sebaliknya. Pada pembubutan bahan politetrafluoroetilena (PTFE) adalah penting untuk menghasilan kekasaran permukaan yang nilainya kecil dan memiliki dimensi sesuai dengan design. Untuk melakukan pembentukan profil benda kerja PTFE dengan menggunakan mesin bubut. Sangatlah sulit untuk menentukan suatu kombinasi parameter pemotongan yang sesuai guna menghasilkan kondisi permukaan yang baik. Berdasarkan hal tersebut maka penelitian ini dilakukan. Proses eksperimen dilakukan dengan menggunakan mesin bubut konvensional model C6132A, mata pahat yang digunakan adalah karbida sisipan TCMT16T304. Benda kerja PTFE memiliki dimensi diameter 120mm, spesimen 485 mm. Parameter pemotongan yang divariasikan terdiri dari kecepatan pemotongan, putaran spindle 210, 260, 360 r/min, hantaran pemotongan 0,1, 0.3 dan 0.5 mm, dan kedalaman pemotongan 0.2 mm. Hasil proses pembubutan dilakukan pengukuran kekasaran permukaan dengan menggunakan alat surface rougness test. Dan pengukuran dimensi spesimen dilakukan dengan menggunakan jangka sorong. Hasil pengukuran kekasaran permukaan diperoleh Nilai Kekasaran Permukaan (Ra) pada dimensi diameter dalam tertinggi yaitu 4,420 μm dengan variasi parameter pemotongan kecepatan potong 138,474 m/min dan pemakanan 0,5 mm/rev. Sedangkan Nilai Kekasaran Permukaan (Ra) pada dimensi diameter dalam terendah yaitu 3,132 μm dengan variasi parameter pemotongan kecepatan potong 237,384 m/min dan pemakanan 0,1 mm/rev. Semakin tinggi kecepatan potong dan semakin rendah pemakanan maka menghasilkan nilai kekasaran permukaan yang kecil, dan begitu juga sebaliknya semakin rendah kecepatan potong dan semakin tinggi pemakanan maka menghasilkan nilai kekasaran permukaan yang besar. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Kata kunci: Kekasasaran permukaan, politetrafluoroetilena (PTFE), parameter pemesinan Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Abstract: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â The turning process is a process of partial removal of workpiece material using a lathe tool. Often the turning results cause scratches that cause surface roughness. Surface roughness is one indicator in determining the quality of the process results. If the value is getting smaller then the surface roughness of the workpiece produced is good, and vice versa. In turning polytetrafluoroethylene (PTFE) material it is important to produce a surface roughness that is small in value and has dimensions by the design. To perform profile forming of PTFE workpieces using a lathe. It is very difficult to determine an appropriate combination of cutting parameters to produce good surface conditions. Based on this, this research was conducted. The experimental process was carried out using a conventional lathe model C6132A. the cutting tool used is TCMT16T304 inserted carbide. The PTFE workpiece has dimensions of 120mm diameter and 485 mm length. The varied cutting parameters consist of cutting speed, spindle rotation 210, 260, 360 r/min, cutting delivery 0.1, 0.3, and 0.5 mm, and depth of cut 0.2 mm. The results of the turning process are measured surface roughness using a surface roughness test tool. The measurement of specimen dimensions is carried out using a caliper. The results of surface roughness measurements obtained Surface Roughness Value (Ra) in the highest inner diameter dimension is 4.420 μm with cutting parameter variations cutting speed 138.474 m/min and 0.5 mm/rev. The Surface Roughness Value (Ra) in the lowest inner diameter dimension is 3.132 μm with the cutting parameter variation of cutting speed 237.384 m/min and 0.1 mm/rev. The higher the cutting speed and the lower the feed, the smaller the surface roughness value, and vice versa, the lower the cutting speed and the higher the feed, the greater the surface roughness value. Keywords: Surface roughness, polytetrafluoroethylene (PTFE), machining parameters
Hak Cipta (c) 2024 Celina Ramadhani, Sobron Yamin Lubis, Erwin Siahaan
Prototype of Eco-Pounding Machine with Snail-Disc Mechanism and Electric Motor Drive
Eco-pounding is becoming more prevalent in the fashion industry, especially among Small Medium Enterprises. However, its manufacture process is slow, tiring, and injury prone. This paper proposes an eco-pounding machine design using a so-called snail-disc mechanism and electric motor drive. Its structural strength is analyzed per component in terms of static and fatigue analysis. From static analysis, the key is the most critical component with static safety factor of 18.1 Meanwhile, from fatigue analysis, the shaft is the most critical component with fatigue safety factor of 99.2. All components have an infinite life.
Hak Cipta (c) 2024 Ashton Bradley Hendrawan, Marvel Mahadi Setiawidjaja, Ramses Maur Ragaventrand Aiboy, Kushendarsyah Saptaji, Farid Triawan
Penerapan Mesin Install Screw Contingency untuk Menurunkan Production Line stop Produk Door lock di PT Aisin Indonesia
Proses produksi door lock dilakukan dengan cara merakit semua komponen yang ada menjadi satu kesatuan unit door lock assembly yang akan digunakan dalam suatu sistem penguncian pada mobil. Proses perakitan melibatkan beberapa mesin, dimana salah satunya adalah mesin pemasangan baut atau disebut dengan install screw machine. Peneliti telah mempelajari mengenai sistem produksi door lock dan masalah yang sering terjadi, serta mencoba memberikan ide alternatif pembuatan mesin install screw contingency untuk mengurangi masalah yang timbul. Penelitian dilakukan dengan cara melakukan observasi langsung, melakukan wawancara dengan pelaku produksi dan mempelajari hal-hal teknis terkait dengan permasalahan yang terjadi. Hasil penelitian menunjukan bahwa terjadi kondisi abnormal yang terjadi pada mesin pemasangan screw yang ada saat ini dan menyebabkan proses produksi tidak dapat dilanjutkan atau dengan nama lain production line stop dengan total waktu sebesar 483 Menit pada rentang bulan Januari sampai Maret 2023. Proses penelitian dan tindakan perbaikan dilanjutkan dengan proses desain, proses pemilihan bahan, proses pembelian bahan, proses perakitan, dan kemudian di lakukan proses ujicoba. Hasil penelitan menunjukan bahwa terjadi penurunan waktu line stop selama periode bulan Mei sampai Juli 2023, dengan jumlah sebesar 100 menit atau turun sebesar 79% dari kondisi sebelum dilakukan perbaikan dan penelitian. Â Kata kunci: Door lock, Assembly, Install screw contingency, Line stop, Produksi
Development of a Coconut Shell Milling Machine for the Extraction of Mosquito Repellent Compounds
This research aims to design and test a coconut shell grinding machine using a hammer mill. This machine was designed with the aim of increasing efficiency in the process of grinding coconut shells into powder with a mesh size of 80. The test method was carried out by testing the machine using a coconut shell weight of 0.5 kg for a testing time of 3 minutes. From the test results, the machine is capable of producing coconut shell powder weighing 0.056 kg. The research results show that the machine designed and tested has performance in accordance with the stated objectives. This machine is capable of producing coconut powder with a mesh size of 80 in a fairly short time, namely 3 minutes. The efficiency of the coconut shell refining process was proven to increase thanks to machine improvements after analysis of test results. Despite this, some issues were still identified during testing. One of them is the lack of tightness of the hammer mill pair in the cylinder, which causes the grinding process to take longer than expected. Suggestions for future research are to improve the placement of the hammer mill so that it is closer or lower in the cylinder to increase grinding efficiency. Apart from that, there is a leak at the front of the cylinder which requires a patch repair. It is recommended to carry out appropriate repairs to the leak area so as not to disrupt the refining process and prevent material loss. Thus, this coconut shell grinding machine can be used as an effective solution in the process of grinding coconut shell charcoal efficiently and effectively.
Hak Cipta (c) 2024 Dermawan Dermawan, Ahmad Nurul Muttaqin
Improvement of Transfer Trolley Driving System as Material Handling Based on Battery Using Quality Function Deployment (QFD) Method
The most important part of increasing productivity in a company is the ability to successfully material handling used. At PT XYZ there is an important process in moving plates from the warehouse area to the material preparation area, especially using a transfer trolley as material handling. The current transfer trolley has several obstacles when operating such as roll cables that are often tripped around resulting in unstable main electrical systems and even transfer trolleys that often suddenly stop due to overloading. The purpose of this study is to determine the concept of transfer trolley design in accordance with user needs using the QFD method thereby improving transfer trolley utilities. The method used starts from determining user needs and ends with the calculation of the motor drive system, along with the transfer trolley concept drawings. The results obtained on the concept of the drive that has been determined using the QFD method is the transfer trolley using the battery as the main source. Calculation of the motor used is 2 kW (2 Motors), as well as the required battery capacity of 12 KWh with operational capabilities of the transfer trolley for 5.28 hours per day.
Hak Cipta (c) 2024 Damar Sasangka Djoewanata
Simulasi: Laju Korosi Baja Pelampung Di Media Air Laut Berombak
Baja dapat diaplikasikan sebagai material pelampung contoh pelampung pada Pembangkit Listrik Tenaga Gelombang Laut (PLTGL). Pelampung akan kontak langsung dengan air laut sehingga dapat terkorosi. Penelitian ini bertujuan untuk mengetahui karakteristik laju korosi baja sebagai pelampung dalam media air laut yang berombak. Metode: sampel baja adalah S45C, SS 400 dan SPAH 3125. Sampel baja dilekatkan pada tepi (sisi) stryofoam dan bawah stryrofoam. Styrofoam lalu diapungkan diatas media air laut pada sebuah mesin simulasi ombak. Sampel pada tepi (sisi) styrofoam akan mendapat deburan ombak. Sampel yang berlokasi di bawah Styrofoam tidak mendapat deburan ombak. Pengukuran korosi menggunakan metode kehilangan berat. Kesimpulan. Sampel yang diletakkan pada tepi pelampung memiliki laju korosi yang berbeda. Pada zona atmosfir laju korosi hampir dikatakan tidak ada. Pada zona terpercik, laju korosi tertinggi. Laju korosi kemudian menurun di zona pasang surut (tidal zone). Sampel berada dibawah pelambung laju korosinya paling rendah. Pemakaian anoda korban menurunkan laju korosi untuk sampel yang diletakkan ditepi pelampung maupun dibawah pelampung.
Design And Implementation Of Rooftop Solar Power Plant On Entrance Guard Post Lighting Of President University Based On IoT And Google Sheet As Database Record
Solar power plant is an alternative energy source that is very safe to use, environmentally friendly, clean, and easy to use. With the development of current IoT technology, this solar power plant application can also be used to monitor the system generated and record the real-time data that has been produced by the system to Google Sheets. The working principle of this solar power plant system is charging the battery with a 12 V system and using a DC 12 V load for 2 lamps with the hybrid system (the Electric State Company supply for backup). This system is equipped with the current and voltage sensor and NodeMCU esp8266 to monitor the charging and discharging electrical parameters, this system can control the on-off of the lamp and monitor the electrical value from the smartphone using the Blynk app, and the electrical value is also recorded to the Google sheet as database. The testing result is the solar panel able to charge up to 13.4 V to the battery. The energy generated during testing is up to 141.4 Wh (100% condition from testing) and the minimum charging energy of the solar panel can charge 58,4 Wh (41% from the maximum production when testing). For the discharging, the load can be supplied overnight 3 times for about 12 hours with the battery, the shortest time battery supply the load is 5.5 hours. If the battery power is not enough to supply the load during night the ATS will move the supply from the battery to the Electric State Company until 06.00 o’clock. Google Sheets can record the data of date and time, charging voltage, charging current, charging power, charging energy, load voltage, load current, load power, and load energy. The data can be saved and downloaded for review and archive data in the future. Keywords: Solar power plant, NodeMCU esp8266, IoT, Blynk App, Google Sheet. Â
Hak Cipta (c) 2025 Antonius Suhartomo, Muhammad Umaruddin
Design and Construction of a Prototype of a Tube Positioning Machine for an Inline Production
Maintaining product quality to meet consumer needs and satisfaction is one of the main goals of every manufacturing company in producing the best products. The author raised the problem of defective products faced by PT Rapid Plast in an inline production involving a printing machine. The print does not adhere perfectly because the product is contaminated with dirt, dust, and liquids when manually moved by the operator. To solve the problem, the author designed an automation solution through a prototype cylindrical pneumatic machine as the drive and the PLC Outseal Nano V5 as the processor component. Functional testing is performed on the prototype to find the resistance of the PLC and mechanical components. The PLC works well for non-stop operation for 30 minutes. Problems were found in the testing of rotary stopper units due to pressure exceeding the requirement. This problem is overcome by reducing the air pressure supply. Prototype efficiency testing was carried out by running 1000 cycles with a 99.1% success rate. A number of improvements such as the addition of bolts and the reduction of the length of the pneumatic pipe are inputs for the proposed design improvements.
Pengukuran Beban Kerja Mental Pada Bengkel Motor di Desa Pawidean Dengan Metode NASA-TLX
Abstrak. Usaha Mikro, Kecil, dan Menengah (UMKM) memiliki peran penting dalam perekonomian Indonesia, termasuk di sektor bengkel motor. Namun, di balik operasionalnya, para pekerja menghadapi tantangan berat, terutama dalam hal beban kerja mental dan fisik. Penelitian ini bertujuan untuk mengukur tingkat beban kerja mental para mekanik menggunakan metode NASA-TLX (National Aeronautics and Space Administration Task Load Index), yang menilai enam aspek utama: tuntutan mental, tuntutan fisik, tuntutan waktu, kinerja pribadi, usaha, dan tingkat frustrasi. Hasil penelitian menunjukkan bahwa aspek usaha (Effort) memiliki skor tertinggi dengan rata-rata 364, disusul oleh tuntutan fisik (328) dan tuntutan waktu (124). Operator dengan beban kerja mental tertinggi memperoleh skor NASA-TLX sebesar 82, sementara yang terendah adalah 72. Beban kerja yang tinggi ini disebabkan oleh berbagai faktor, seperti banyaknya pekerjaan yang harus diselesaikan dalam waktu terbatas, tuntutan hasil kerja yang sempurna, serta kurangnya tenaga kerja sehingga karyawan harus bekerja lebih keras. Untuk mengatasi masalah ini, beberapa solusi dapat diterapkan, seperti menambah tenaga kerja, menyederhanakan proses pencatatan, serta memberikan insentif bagi pekerja lembur. Dengan langkah-langkah ini, diharapkan kesejahteraan pekerja meningkat dan produktivitas bengkel tetap terjaga. Kata Kunci: Beban kerja mental, NASA-TLX, mekanik bengkel, stres kerja, produktivitas. Abstract. Micro, Small and Medium Enterprises (MSMEs) play an important role in the Indonesian economy, including the motorcycle repair sector. However, behind their operations, workers face tough challenges, especially in terms of mental and physical workload. This study aims to measure the level of mental workload of mechanics using the NASA-TLX (National Aeronautics and Space Administration Task Load Index) method, which assesses six main aspects: mental demands, physical demands, time demands, personal performance, effort, and frustration level. The results showed that the Effort aspect had the highest score with an average of 364, followed by Physical demands (328) and Time demands (124). The operator with the highest mental workload obtained a NASA-TLX score of 82, while the lowest was 72. This high workload is caused by various factors, such as the amount of work that must be completed in a limited time, the demand for perfect work results, and the lack of manpower so that employees have to work harder. To overcome this problem, several solutions can be implemented, such as increasing the workforce, simplifying the recording process, and providing incentives for overtime workers. With these measures, it is hoped that worker welfare will improve and workshop productivity will be maintained. Keyword: Mental workload, NASA-TLX, workshop mechanic, work stress, productivity.
Hak Cipta (c) 2025 Claudha Alba Pradhana
Proper usage of SAE 20W, 30W, or 40W on a 110 cc Engine using Premium, Pertalite, or Pertamax for Optimum Specific Fuel Consumption and Thermal Efficiency
This article determines the right lubricating oil for a 110-cc petrol engine. The Honda Blade was a sample for a 110-cc petrol motorbike engine. This article is aimed to be used as a guide for selecting the right type of monograde engine lubricant according to the gasoline used. Torque and engine speed measurements are carried out using a dyno meter, while fuel consumption is determined using a flow meter and stopwatch. This research found SAE 20W as the most appropriate engine lubricant to produce the best specific fuel consumption and engine thermal efficiency. The second-best lubricant option is SAE 30W. When SAE 20W lubricant and Pertamax or Pertalite fuel are used, the optimum motor engine speed to produce specific fuel consumption and optimum engine thermal efficiency is 2900 [RPM]
Hak Cipta (c) 2025 Belyamin Belyamin, Anindia Octarisa Rizkiya, Arifia Eka Yuliana, Iwan Susanto
The Monitoring Prototype of Water Physical Condition for Tilapia
Tilapia is aquatic organism that is sensitive to water quality parameters such as ammonia, pH, and temperature which means that the monitoring of those parameters become necessary to ensure the healthy development of the fish. To overcome this problem, this research developed a prototype which can monitor the condition of ammonia, pH, and water temperature in Tilapia Fishponds, and the send text message as an alert when the ammonia and water temperature exceed threshold value. The threshold value of ammonia monitoring is 1 mg/L and the threshold value of water temperature monitoring is 32 Degree Celsius. The readings from the proposed prototype are compared against conventional tools (HI 715 ammonia checker for ammonia and MEDIATECH 3 IN 1 quality water tester for pH and water temperature). The results show that the proposed prototype recorded readings within the acceptable range of error. The device is tested in two Tilapia Fishponds. Based on the experiments in 2 Tilapia Fishponds (Tilapia Fishpond A and Tilapia Fishpond B), the prototype can monitor the ammonia, pH, and water temperature with the average errors within acceptable error which are 0.03 mg/L, 0.16 pH, and 0.62 Degree Celsius in Tilapia Fishpond A. The average of measurement error in Tilapia Fishpond B are 0.04 mg/L, 0.37 pH, and 0.36 Degree Celsius. The tests also showed that the proposed prototype can send a text message as an alert to user’s mobile phone.
Pengujian Performa Pada Variasi Tekanan dan Diamater Outlet Nozzle pada Mesin Dry Leak Test
Abstrak. Mesin Dry Leak Test adalah alat yang digunakan untuk menguji kebocoran pada suatu komponen tanpa menggunakan cairan. Nozzle merupakan komponen yang paling berpengaruh pada mesin dry leak test karena mendistribusikan aliran udara pada komponen yang akan di uji. Pada penelitian ini dilakukan rancang-bangun mesin dry leak test dengan nozzle dan dies spesifik yang akan digunakan pada lampu reflektor mobil Avanza. Kemudian pengujian performa mesin dilakukan dengan memvariasikan lubang outlet nozzle dengan dimensi Ø 2/3/4 mm dan tekanan input pada rentang 1 – 5 Bar. Diameter outlet 2 dan 3 mm memiliki perfroma yang baik hingga 3 Bar. Sedangkan dia. 4 mm hanya bisa digunakan pada tekanan 1 Bar. Abstract. The Dry Leak Test Machine is a tool used to test components for leaks without using liquid. The nozzle is the component that has the most influence on the dry leak test machine because it distributes air flow to the component to be tested. In this research, the design and construction of a dry leak test machine was carried out with a specific nozzle and dies that will be used on the reflector lights of the Avanza car. Then machine performance testing was carried out by varying the nozzle outlet hole with dimensions Ø 2/3/4 mm and input pressure in the range 1 – 5 Bar. Outlet diameters of 2 and 3 mm have good performance up to 3 Bar. Meanwhile dia. 4 mm can only be used at 1 Bar pressure.
Comprehensive Review of Fast Charging Technology and DC-DC Converters in Electric Vehicle Development: Challenges and Future Directions
Electric vehicles (EVs) are at the forefront of global initiatives to reduce greenhouse gas emissions and tackle urgent environmental challenges. This study presents a comprehensive review of fast charging technologies and DC-DC converters, which are crucial in the development of EV infrastructure. It explores various DC-DC converter topologies used in EVs and examines the challenges associated with fast charging infrastructure. Additionally, the study analyzes the application of artificial neural networks (ANNs) for predicting junction temperatures of electronic components in EVs. The findings indicate that ANNs enhance the accuracy of temperature predictions, contributing to performance optimization and extended component lifespan. Furthermore, the study underscores the significance of energy management technologies, particularly the integration of hybrid energy storage systems (HESS) that combine batteries and supercapacitors. The study’s implications include recommendations for advancing fast charging technology, improving thermal management, and educating drivers to enhance EV energy efficiency. Despite existing challenges, technological advancements in these areas hold great promise for accelerating EV adoption and supporting global decarbonization efforts. Keywords: Electric Vehicle (EV), Artificial Neural Network (ANN) Model, Thermal Management, Hybrid Energy Storage System (HESS), Energy Management.
Effect of an Electromagnetic Fuel-Saving Device on Motorcycles Using Blended fuel of Pertalite-bioethanol
The increasing demand for fuel efficiency and environmental sustainability has led to the exploration of alternative fuel blends and innovative fuel-saving technologies. This study investigates the effect of an electromagnetic fuel-saving device on the performance of a motorcycle using a Pertalite-Bioethanol fuel blend at different compositions (P100, P90, P80, and P70). The engine's performance was evaluated based on Maximum Torque, Brake Horse Power (BHP), and Specific Fuel Consumption (SFC) using a chassis dynamometer test. The results show that the use of the electromagnetic fuel-saving device significantly improves motorcycle performance. The highest torque was recorded at P80, reaching 13.52 Nm with the device, compared to 12.7 Nm without the device. Similarly, BHP at P80 increased from 7.45 HP (without device) to 9.89 HP (with device), indicating enhanced combustion efficiency. Additionally, SFC was lower when using the device, with the lowest fuel consumption observed at P80 (0.025 kg/HPÂ·h with the device), compared to 0.029 kg/HPÂ·h without it. These findings suggest that a 20% bioethanol blend (P80) provides an optimal balance of power, torque, and fuel efficiency, particularly when combined with electromagnetic fuel treatment. However, at higher bioethanol concentrations (P70), performance slightly declined, likely due to the lower energy content of ethanol compared to gasoline. The improvement in efficiency with the electromagnetic device is attributed to the enhanced dispersion of hydrocarbon molecules, leading to better combustion. The electromagnetic fuel-saving device effectively enhances engine performance and fuel efficiency, particularly when paired with a 20% bioethanol blend. This study provides valuable insights into the potential of alternative fuel treatments in improving combustion efficiency and sustainability. Future research could focus on long-term durability, emissions analysis, and further optimization of bioethanol fuel blends for improved engine performance. Keywords: Electromagnetic fuel-saving device, Pertalite-Bioethanol blend, Motorcycle performance, Fuel efficiency.
Study of Peak Current Wire-cut EDM on Surface Morphology With Integration CAD/CAM in The Manufacturing of Chain Components
In this increasingly modern era, science and technology (IPTEK) is growing rapidly, one of which is progress in the manufacturing industry sector to produce a product. The machining process that is often used today is Wire Electrical Discharge Machining (WEDM). This machine began to be widely used because it is able to cut workpieces quickly, with good efficiency, and with accurate dimensions. This study aims to study the effect of variations in the use of peak current parameters in the WEDM cutting process by using integration between CAD/CAM software to create programs for manufacturing chain components. Then in the process of cutting the material will be given a variation of peak current treatment to determine the surface morphology. The software used for CAD is Autodesk Inventor Profesional 2015 and the CAM uses the Mastercam X4 application. While the peak current variations use 8, 10, 12 A. The results show that software integration is between Autodesk Inventor Profesional 2015, then the image results are exported to the Mastercam X4 application and can be run on WEDM machines. In addition, the surface morphology images obtained show striking differences with different peak current variations. At high peak currents of 10 and 12A the number of craters produced is larger than the craters at a low peak current of 8A. Besides that, the debris produced on the surface morphology with a higher peak current has a larger size with a greater amount.
Hak Cipta (c) 2023 M. Nuril Anwar Habiby
ANALISIS PENGARUH PERBAIKAN KEBOCORAN DENGAN PLUGGING TUBE TERHADAP KINERJA HPHEATER
Abstrak dikosongkan sementara karena error karakter saat upgrade.
Alat Pengering Biopelet Tipe Rak Dengan Daya 500 Watt
Drying of biopellets is currently still using the conventional method, namely by drying directly under the hot sun. This method is not optimal when the weather is rainy or cloudy, and requires a large area of land. Based on these problems, the purpose of this study was to test the performance of the biopellet dryer and determine the drying time to reach the moisture content in accordance with SNI 8021:2014. The test was carried out by drying 5.000 grams of biopellet samples and seeing the average of the final mass. The average final mass of each test sequentially is 4,785 grams, 4,581 grams, 4,385 grams, 4,016 grams, 3,804 grams, and 3,595 grams. The reduction in water content obtained within 180 minutes was 28.12% with the initial water content in biopellets of 40%. The total water content obtained from the drying is 11.88%. Performance of the biopellet dryer with the power used by this biopellet dryer is 500 Watt. Capable of drying 5.000 grams biopellet with an initial moisture content of 40%. Room temperature is 120°C with a drying rate of 468.667 Gram/hour. Dry biopellet within 180 minutes with a moisture content of 11.88% according to the standard of SNI 8021:2014. Â Keywords: Biopellet Drying, Dryer, Moisture Content, Power
Hak Cipta (c) 2023 Dianta Mustofa Kamal, Ghany Heryana
Electrical Design and Construction of 3 Axis CNC Plasma Metal Cutting Machine
Abstract. Computerized Numerical Control (CNC) is one of the developments in machining technology that is operated automatically which can support the demand for a product that has a complex shape, high accuracy and can work on objects that cannot be done with conventional machining. The design of the CNC 3 Axis machine is carried out with a design process to determine machine dimensions, determine calculations to determine motor requirements specifications. Followed by electrical wiring design to select the specifications of the controller used, and continued with testing the precision of the tool when testing the tool. The results of the design of this tool use Mach3 software as a machine controller and use a stepper motor as a motor drive. 3 Axis (X, Y and Z) Plasma CNC Machine (WCM) Design Using a Mach3 PC Base Stepper Motor that the controller system using Mach3 software has easy configuration because there is an auto tuning feature on each axis to determine distance precision. Using Mach3 software does not require a lot of cost because it can be downloaded on the internet. Keywords: CNC, Fabrication, Plasma Cutting Machine, Design and Build, Mach3
CFD Analysis Of Wind Turbine For 10 MW Electrical Power Generator In East Nusa Tenggara
Electrical energy has a vital role in daily human activities. The energy sources currently used in a generation are non-renewable energy sources. Wind energy is a renewable energy source that can be utilized as mechanical or electrical energy through a conversion called the Wind Energy Conversion System. In wind power plants, a somewhat important component is a wind turbine; the wind will drive the turbine and generate electricity from the generator. This study analyzed the suitability of turbine designs to be applied to wind power plants in East Nusa Tenggara, especially in three areas with a reasonably high wind potential compared to the surrounding area. Selection of appropriate wind turbine for electrical power generation in East Nusa Tenggara is the first phase of the study, it compared two wind turbine designs, namely Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VAWT). Followed by analyzing the performance of the selected turbine using secondary data and analysis software, namely Ansys, to determine the torque generated by the wind turbine under study. The simulation results showed that the Horizontal Axis Wind Turbine produced power of 259.491 kW at a wind speed of 5.86 m/s and 271.447 kW at a wind speed of 6.13 m/s. Based on the results, the Horizontal Axis Wind Turbine needed for generating 10 MW is 56 units.
Tensile Behavior of SM520B-1G Plate by SMAW Joint Applied for Elevated Highway Road Construction
The main objective of this project is to study the mechanical and chemical characteristics of the SM520B welding plate used in the Jakarta-Cikampek Elevated Highway construction. The construction is needed to decrease the high volume of vehicles passing the highway every day. SM520B metal plate is used as the material in the girder box due to high strength and toughness and also good weldability.There are several tests conducted in the lab of PT Biro Klasifikasi Indonesia (Persero), i.e., spark OES test, tensile test, bending test, Charpy impact test, macro hardness test, and macro etch test. Spark OES test result shows that SM520B is low alloy steel with 0.165% carbon content. The SM520B tensile test result determines that the average yield strength, i.e., 503.45 N/mm², and the average tensile strength, i.e., 608.87 N/mm² of SM520B steel plate has met the requirement according to ASTM DS67B standard. The bending test result shows that no crack was found in the welding area. The Charpy impact test results of SM520B Welding plate indicates that high impact energy occurs in the welding area with the highest value of 214,24 J and slowly reduces when approaching close to the fusion line, i.e., 186.08 J. Higher Hardness Vickers value occurs in the HAZ area of SM520B during Vickers hardness, i.e., 235.8 J and the macro etch test result on the welding plate indicate there is no significant crack, porosity, and slag inclusion found in the welding. The main objective of this project is to study the mechanical and chemical characteristics of the SM520B welding plate used in the Jakarta-Cikampek Elevated Highway construction. The construction is needed to decrease the high volume of vehicles passing the highway every day. SM520B metal plate is used as the material in the girder box due to high strength and toughness and also good weldability. Â Â Â Â There are several tests conducted in the lab of PT Biro Klasifikasi Indonesia (Persero), i.e., spark OES test, tensile test, bending test, Charpy impact test, macro hardness test, and macro etch test. Spark OES test result shows that SM520B is low alloy steel with 0.165% carbon content. The SM520B tensile test result determines that the average yield strength, i.e., 503.45 N/mm², and the average tensile strength, i.e., 608.87 N/mm² of SM520B steel plate has met the requirement according to ASTM DS67B standard. The bending test result shows that no crack was found in the welding area. The Charpy impact test results of SM520B Welding plate indicates that high impact energy occurs in the welding area with the highest value of 214,24 J and slowly reduces when approaching close to the fusion line, i.e., 186.08 J. Higher Hardness Vickers value occurs in the HAZ area of SM520B during Vickers hardness, i.e., 235.8 J and the macro etch test result on the welding plate indicate there is no significant crack, porosity, and slag inclusion found in the welding.
CFD ANALYSIS OF OFFSHORE HAWT BASED ON WIND SPEED PROFILE AT 50 METERS ALTITUDE IN THE SOUTHERN WATERS OF UJUNG PANDANG, SOUTH SULAWESI
Offshore wind turbines have many advantages over onshore wind turbines, with better wind speeds, fewer spatial constraints, and decreased visual and noise effects in densely populated areas. Indonesia's onshore wind energy potential for wind speeds exceeding 4.0 m/s is 60.65 GW. Moreover, Indonesia's offshore wind energy ability for wind speeds exceeding 6.0 m/s is 94.23 GW. Consequently, wind speeds in offshore regions are more promising than onshore areas, which can notably enhance renewable electricity generation and reduce the usage of fossil fuels. This research is conducted by modeling the 3D HAWT design in 2 domains, Stationary and Rotational, which will be combined in one interface. The simulation results indicate a significant increase in turbine performance parameters with increasing wind speed. It also successfully modeled the interaction between wind flow and the turbine, as shown in the velocity contours that display higher wind speed distribution at the blade tips and in the pressure contours that show higher pressure distribution on the front side of the blades and on the side of the blades relative to the direction of rotation
Hak Cipta (c) 2024 Nanang Ali Sutisna, Yehezkiel Kusmadi Ritonga
THE EFFECT OF CURRENT VARIATION ON TENSILE STRENGTH IN SMAW WELDING USING SS400 STEEL
Welding is one of the important processes in the manufacturing industry. One of the welding methods that is currently used is metal arc welding (SMAW) shields. In smaw welding, the electric current used has a crucial role in determining the welding characteristics, including the tensile strength of the weld joint. The aim of this research is to determine the effect of variations in current strength on the tensile strength using SS400 steel. The method used in this research is the experimental method. This research was carried out by making specimens with a V-shaped seam which were then welded using varying amperage currents of 75 A, 85 A and 95 A. The material used was SS400 steel which had a thickness of 6 mm. So, from this research, the results obtained are the highest tensile accuracy value, namely at a flow accuracy of 95 on the ker 2 sample, resulting in a total tensile accuracy value of 1180.60 Kgf. And the lowest tensile accuracy value is at 75 flow curves in the ker 1 sample, resulting in a total tensile accuracy value of 1093.88 Kgf. This is due to the fact that each variation in current accuracy greatly influences the Tensile Accuracy.
Hak Cipta (c) 2025 Salman Faruqi Abdullah, Lydia Anggraini
Crack Analysis of Polyoxymethylene Reinforce Glass Fibre Material on Locker Table
Polyoxymethylene (POM) is a type of thermoplastic that is frequently used in various industrial applications due to its good dimensional stability, corrosion resistance, and superior tensile strength. However, in certain applications such as locker tables, the weakness of this material is revealed in structural failures. This research uses the finite element simulation method to analyse the failure of a locker table exposed to a helical torsion spring. The main focus was on the fracture of the part connected to the helical torsion spring, a common problem in plastic material applications subjected to cyclic loading. Results showed that the fracture occurred at a stress level of 121.061 MPa, exceeding the yield strength value that should have been broken at 150 MPa. In addition, the analysis showed that the highest Von Misses stress occurred where the spring was located, exceeding the specified yield strength. Tensile tests showed the effect of ambient temperature on the tensile strength of the POM+25%GF material. The proposed solution through the development of an additional structure in the form of ribs on the product successfully increased the strength of the locker table under load. This research provides important insights in improving product design to minimise the risk of structural failure in POM+25%GF material.
Hak Cipta (c) 2024 Ainun Nidhar, Genia Auberta, Anissa Puspa Dewi, Ghany Heryana
Karakteristik Hasil Co-Pyrolysis dari Limbah Plastik dan Oli Bekas
This study aims to utilize low-density polyethylene (LDPE) plastic waste and used engine oil to produce alternative liquid fuel through the co-pyrolysis method. The co-pyrolysis process was carried out with various ratios of LDPE plastic waste and used engine oil, specifically 5:0, 5:1, 5:2, 5:3, and 5:4, within a temperature range of 165°C to 177°C for 1 hour. The characteristics of the resulting liquid products were tested to determine their calorific value, density, and viscosity. The results showed that the calorific value increased with the addition of used engine oil, reaching 11,061.67 cal/g at a 5:4 composition. The liquid products had an average density of 0.8686 g/mL, which was within the range of diesel fuel density. The viscosity of the liquid products also met gasoline standards, with an average value of <1 cSt. The highest yield efficiency reached 9.14 mL/kWh at a 5:4 composition with an efficiency of 1.93%, indicating significant potential in producing energy-efficient liquid fuel. This study sheds new light on the use of plastic waste and engine oil as environmentally friendly alternative liquid fuels.
Hak Cipta (c) 2024 Dianta Kamal, Ghany Heryana
STUDI EKSPERIMEN KINERJA TURBIN ANGIN PROPELLER PIPA PVC DENGAN UJUNG BENGKOK DAN TANPA UJUNG BENGKOK
Turbin angin sumbu horizontal (TASH) memiliki poros rotor utama dan generator listrik di puncak menara, di dalam turbin angin terdapat komponen yang sangat penting yaitu blade merupakan bagian turbin angin yang berfungsi menerima energi kinetik dari angin dan merubahnya menjadi energi gerak (mekanik). Pada penelitian turbin kali ini menggunakan baling baling yang berbahan pipa PVC dan menggunakan ujung bengkok pipa PVC. perancangan yang digunakan dengan cara eksperimen, dan menggunakan software minitab 19 untuk pengolahan data, sedangkan ekperimen bertujuan untuk mengetahui nilai daya yang dihasilkan, Eksperimen ini menggunakan variasi kecepatan angin 5 m/s, 6 m/s dan 7 m/s, dan terdapat variasi posisi ekor, yaitu dengan posisi menghadap ke kiri, kanan dan tengah. Experimen pada turbin angin dengan menggunakan ujung bengkok mendapatkan daya rata-rata paling besar 7,42 Watt, sedangkan experimen pada turbin angin tanpa menggunakan ujung bengkok dapat menghasilkan daya rata-rata 7,54 Watt. Turbin angin dengan menggunakan ujung bengkok memiliki nilai koefisien power (Cp) paling tinggi yaitu 0,0182 , sedangkan turbin angin tanpa menggunakan ujung bengkok memiliki koefisien power (Cp) paling tinggi yaitu 0,0145.
Design Analysis of a Tubular Chassis for an Electric Vehicle using Finite Element Method
In these new eras, human race was stuck between fully converting vehicles using an electric motor or combustion engine. It is a known fact that people were forced by the government to reduce carbon footprint, with the new regulation of Carbon tax that will be implemented in 2022 by the government. The main purpose of this research is to design a chassis for an electric vehicle with a Torsional Bar front suspension and single rear shock breaker is to help reducing carbon production in the future. By developing a chassis for an electric Go-Kart, the students of President University is one step closer to develop an electric vehicle that can be used by everyone and become a leading green technology innovator in Indonesia, this research will test the capability of the chassis to endure certain loads with a few limitations, the 3D design will be performed in software called Solidworks while the static structural, modal analysis, and Harmonic Response Simulation will be performed in Ansys using the finite element method. The expected results from this research is a sufficient design of electric go-kart through a stress analysis, safety factor analysis, chassis deflection analysis, and chassis natural frequency analysis.
PERAN INHIBITOR KOROSI PADA PROSES DAN HASIL PRODUKSI BAJA: STUDI LITERATUR REVIEW
This study aims to determine the definition of corrosion, types of corrosion, corrosion protection in the steel production process, corrosion protection using inhibitors, types of inhibitors, and types of inhibitors for various materials. The research approach is a qualitative approach with a literature review research method. The research data obtained were analyzed descriptively and quantitatively. This research was conducted by systematically analyzing literary sources in the form of scientific articles, books, accompaniments and theses from reliable sources. The results of this study examine the process of corrosion protection in steel production processes and products using various types of inhibitors. The result is that the coiled coil material is subjected to a continuous curing line to produce galvanized steel coils, which can lead to corrosion of the material, among other things by environmental concentrations. The corrosion process can be prevented in various ways, one of which is with an inhibitor. The types of inhibitors used consist of organic and inorganic materials. The inorganic inhibitors used were EonCor W203, while the organic inhibitors used were extracts of guava leaves, tea leaves, soybeans and coffee.
Hak Cipta (c) 2023 sahril - sabirin, andika cahya febiawan, Ardika Achmad Gustama, Faris Ahmad Irfany, Yudi Oktavia Ramadhan, Ananda Yhuto Wibisono Putra
Rancang Bangun Mesin Potong Logam Plasma CNC 3 Axis
CNC (Computerized Numerical Control) merupakan salah satu perkembangan teknologi permesinan yang digunakan dalam proses manufaktur dengan menggunakan kontrol terkomputerisasi sehingga dapat menunjang proses pembuatan suatu produk yang memiliki tingkat presisi tinggi, bentuk yang rumit serta tingkat kecepatan proses pembuatan yang relatif lebih cepat dibandingkan dengan permesinan pembuatan produk secara manual. Pada penelitian ini dihasilkan mesin potong plasma CNC dengan proses desain penentuan ukuran besaran mesin yang sesuai dengan kebutuhan perusahaan fabrikasi menengah, menggunakan bahan extrusion alumunium profile, besi siku dan besi hollow sebagai body dan frame mesin pada tiap axis karena jenis bahan ini sangat mudah untuk digunakan, menggunakan 1 unit stepper motor pada setiap axis (X, Y dan Z), metode pengaturan kerataan meja mesin menggunakan knob baut adjuster agar proses penyetingan kerataan meja mesin menjadi lebih cepat, penggunaan roda casters pada kaki mesin agar proses pemindahan posisi mesin lebih praktis, perancangan meja mesin agar bisa menampung air agar percikan spark proses pemotongan menjadi lebih aman, ditambah dengan sistem valve drain agar pengurasan air tampungan lebih mudah dilakukan. Selanjutnya rancangan mesin ini akan dijalankan dengan menggunakan perangkat lunak CNC Mach3 berbasis PC sebagai kontroller mesin karena penggunaan software Mach3 yang mudah untuk digunakan.
Hak Cipta (c) 2023 Fauzi Ridwan, Wahyono Sapto Widodo
Nilai Gaya Tekan Yang Dibutuhkan Oleh Dinding Pemecah Dalam Memecahkan Nut Pada Stasiun Ripple Mill
Ripple mill is there at the kernel station. The function of this ripple mill is that of a breaking or breaking shell from the sawmill's core by having a centrifugal (far from the center of spin) that produces ripple mills, which releases the seed from the rotor and gives it a powerful impact that causes the shell to shatter. The principle of ripple mill is that a pinch, a grinding of beans between the gaps a cistern rotorassembly with the ripple mill plate. It's called a saw seed that feeds from above the ripple mill and gets it repeatedly between the ripple plate and the moving rotor. The pressure style is a force that tends to press or destroy material. In the industry we also employ ripple mill force, for example. The sliding voltage is a stylistic link alluding to the surface of an expanding cross-section. This study aims to know how much pressure force is needed for ripple mills during the shell- breaking process, and how much slide tension occurs to the stake in the shell- breaking process. From the research that has been done, the pressure force that wall breakers need to break the nut at 31.18 n for the process to break down properly, and the shifting tension that occurs in a stake of 0.0686 n /mm2 so that the stake can last longer in its usage of ripple mill.
KESIAPAN TEKNOLOGI KAMIKAZE DRONE UNTUK PEPERANGAN MODERN DIMASA DEPAN
Konsep Internet of Military Things dan Internet of Battlefield Things merupakan gagasan bahwa pertempuran militer di masa depan akan didominasi oleh Artificial Intelligents & Cyber Warfare dan kemungkinan pertempuran ini terjadi di lingkungan perkotaan. Melihat dari ancaman dan tren pengembangan teknologi di masa depan maka dibutuhkan sebuah senjata yang bersifat autonomous dan precision. Kamikaze Drone disebut juga drone bunuh diri merupakan jenis sistem senjata hibrida, yang dapat dikombinasikan antara guided munitions dan unmanned combat aerial systems (UCASs) yang merupakan salah satu tipe Autonomous Weapon. Dalam proses pengembangannya, Technology Readiness Level (TRL) Kamikaze Drone di Indonesia saat ini sangat rendah. Hal ini ditandai dengan Teknologi utama Kamikaze Drone belum tersentuh. Penelitian ini bertujuan untuk menilai kesiapan dalam pengembangan teknologi utama Kamikaze Drone. Technology Readiness Level (TRL) pada Teknologi utama Kamikaze Drone meliputi Guidance & Control dan Seeker masih berada pada TRL 2 dimana masih dalam bentuk konsep dan formula. Teknologi Warhead masih berada pada TRL 3 dikarenakan Fuze dan Explosive masih mengandalkan impor dari luar, namun untuk Case Warhead Indonesia telah berhasil memproduksinya dengan sendiri. dan Airframe structure berada pada TRL 7 dimana kedua teknologi ini dapat mengadopsi teknologi Small UAV yang sudah dikembangkan Industri Pertahanan Nasional maupun Swasta dan Porpulsion system meliputi Battery & Motor masih berada pada TRL 5.