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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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.
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]
Copyright (c) 2025 Belyamin Belyamin, Anindia Octarisa Rizkiya, Arifia Eka Yuliana, Iwan Susanto
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.
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.
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.
Copyright (c) 2025 Claudha Alba Pradhana
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
Copyright (c) 2025 Antonius Suhartomo, Muhammad Umaruddin