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INDONESIA
JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN
Published by Universitas Negeri Yogyakarta
ISSN : 25487590     EISSN : 25487590     DOI : -
Core Subject : Education, Social, Engineering,
Education Mechanical Engineering Social Sciences
Jurnal Dinamika Vokasional Teknik Mesin (JDVTM) is published by the Department of Mechanical Engineering Education, Faculty of Engineering, State University of Yogyakarta. The journal is published twice a year in April and October. Each publication contains articles comprising high quality theoretical and empirical original research papers, review papers, and literature reviews. The scope of study of this journal includes mechanical engineering education, technology and vocational education, learning and curriculum development, learning method development, and learning media. All of the fields study, particularly in mechanical engineering vocational and education. The articles submitted should be attended to the particular topics above.
Arjuna Subject : -
Articles 185 Documents
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THE EFFECT OF THE PROJECT BASED LEARNING MODEL ON IMPROVING THE COMPETENCE OF PRACTICAL LEARNING OF VOCATIONAL STUDENTS: A REVIEW Dewangga, Andrian Wisnu; Ahmad, Noesanto Dewantoro
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.66754

Abstract

This research aims to evaluate the effect of implementing the Project Based Learning (PjBL) Model on increasing the practical learning competence of Vocational High School students. Data collection was carried out through a literature review. This research is a literature review research that adopts a narrative review type, which aims to comprehensively investigate and analyze various scientific articles related to the research topic. Identify relevant literature, researchers conducted a search using the keyword "project-based learning model" on Google Scholar. Of the 13 journals found, 6 journals were not relevant and were excluded from the analysis. The results of this research indicate that project-based learning has the potential to be an effective method in improving students' practical skills in vocational schools, helping to build students' self-confidence in studying practical material, and providing a positive impact on students' participation in learning. The implication of this research is the importance of implementing PjBL as an effective learning strategy in improving vocational school students' competence in the context of practical learning
ANALYSIS OF MECHANICAL COMPETENCY AND SERVICE PRICES ON CUSTOMER SATISFACTION AT CV. NIRMALA KN AUTOCARE WORKS Shidqi, Fahmi Shidqi; Supriyatna, Deddy
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.68039

Abstract

High-intensity use of personal transportation equipment will result in damages, which will disrupt daily performance; therefore, vehicle maintenance and repairs need to be carried out regularly and periodically. The problem that often occurs is that service prices are expensive, and yet the results are unsatisfactory. The reason behind this can be inadequate mechanical skills or competence. This research tested the relationship between mechanical competence and service prices on customer satisfaction at CV. Karya Nirmala Auto Care Jl. Pandeglang-Rangkas Gang H Kabal, Kabayan, Pandeglang Regency, Banten. This research uses quantitative methods, service price data, and mechanic competency at the Karya Nirmala Auto Care workshop. Data was collected using interviews and questionnaires. The data analysis used was multiple correlation, and the results showed a strong relationship between mechanical competence and service prices on customer satisfaction.
THE EFFECT OF FLUID VARIATIONS IN THE RESERVOIR ON AIR PRESSURE IN KNIFE TOOL HEATING FURNACES Ramadhan, Muhammad Rizki; Firizal, Harlin; Hermawan, Rudi; Ramadhan, Anugrah Agung; Setiyo, Edi; Susiloningsih, Esti
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.59568

Abstract

The stainless steel material reservoir tube can produce combustion steam from the heating furnace. The research objective was to determine the effect of variations in the type of liquid and air pressure efficiently used in the reservoir tube. The type of research used is pure experimental research. The medium used is mineral water, 10%, 20%, and 30% brine, and the Manufacturer's coolant is heated using a heating furnace at 110° C for 42 minutes and measured by a pressure gauge. The results of the tests carried out have the effect of differences in mineral water 1.50 bar or 1.48 atmosphere, 10% brine 1.50 bar or 1.48 atmosphere, 20% brine 2.40 bar or 2.36 atmosphere, 30% brine 3, 50bar or 3.45 atmospheres, factory coolant 1.75bar or 1.72 atmospheres. 30% salt water is more efficient and suitable for the stainless steel material reservoir heating process in producing steam under pressure, which is used in knife tools.
INFLUENCE OF A PREPARATION TRAINING FOR STUDENT COMPETENCY COMPETITIONS IN CAD MECHANICAL Ardianto, Fiki; Subandi, Subandi; Jarwopuspito, Jarwopuspito; Efendi, Yosep
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.62983

Abstract

Lomba Ketrampilan Siswa (LKS) is an annual activity in student competency competition among students at the Vocational High School (VHS) [R1] level in accordance with the areas of expertise taught at each participant's school. This activity is one part of a series of selections to get the best students from all over Indonesia who will be guided by teams in their respective areas of expertise and included in international level competency competencies. Students who take part in the LKS competition are students who are chosen by their school. To get the title of champion, of course, there is a lot of preparation that must be undertaken and one of them is training. This study aims to present data regarding the training program that students undergo as preparation for regional-level LKS competitions. This research uses a qualitative approach with a descriptive research type. The results of this study found that there were several scheduled, independent and incidental training programs
ANALYSIS OF VIBRATION CHARACTERISTICS ON WA-350 WHEEL LOADER HEAVY EQUIPMENT MACHINE BASED ON CAPACITY COMPARISON WITH 2000 RPM ROTATION IN HORIZONTAL, VERTICAL AND LONGITUDINAL AREAS Sihombing, Suriady; Nababan, Wilson Sabastian; Tampubolon, Miduk; Panjaitan, Fernando
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.71616

Abstract

Wheel loader is a tool that facilitates the work of moving materials from one place to another using hydraulic energy. Wheel loader machine testing is carried out by looking for vibration data arising in the engine block. There are several stages that must be done, the first step is preparation of a Handheld Vibrometer as a vibration detection device. Next, examine the vibration level read on the Handheld Vibrometer with ideal, medium, and maximum rotation. Based on the ISO 2372 standard, vibration response results are obtained where the power capacity of a diesel motor is 350 kW where the highest speed is 62.7 mm / s with a horizontal direction at 90 seconds, categorized in Zone D in red, vibration from the engine is within dangerous limits and can be damaged at any time.
THE INFLUENCE OF THE MATERIAL TYPE ON THE RESERVOIR AIR PRESSURE IN THE KNIFE TOOL HEATING FURNACE Wijaya, Ikhlasul Amal; Hermawan, Rudi; Firizal, Harlin; Ramadhan, Anugrah Agung
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.59566

Abstract

A reservoir is a vessel or storage container used to store pressure resulting from the evaporation of a liquid. In its use, the Reservoir's constituent material must be good to produce maximum results. This experimental research aims to study the influence of the reservoir material types, such as aluminum, steel, and stainless steel, on the air pressure produced by each material[R1] . The experiment was conducted by aluminium, steel, and stainless steel material testing. The results showed that aluminum, steel, and stainless steel produce a pressure of 2.00 bar, 2.50 bar, 1.50 bar, respectively.. The comparison of results shows that the type of reservoir material will affect the final result of reservoir pressure.
DESIGN AND BUILD A COCONUT HUSK CHOPPER MACHINE USING AN 8 HP GASOLINE ENGINE Muchlisinalahuddin, Muchlisinalahuddin; Apriyadi, Yudi; Arief, Rudi Kurniawan
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.66355

Abstract

The coconut frond cutter or coconut frond shredder is a device used to transform coconut fronds into small pieces, even turning them into a finely textured material. This study examines the design and development of a coconut-chopping machine that uses an 8 HP combustion motor. Structural analysis was performed on the machine frame by considering the maximum and minimum Von Mises Stresses. The analysis results show that the maximum Von Mises Stress in the frame is 1.670e+06 N/mm², while the minimum stress is 2.338e+04 N/mm². The displacement of the frame was observed at 2.642e-02 mm to 1.000e-30 mm. The safety factor of the frame was found to be 1.366e+02, indicating an adequate level of safety. Next, this study analyzed the shredding capacity of the machine. The analysis showed that the largest shredding capacity was 3619.30 kg/hour, which occurred at a high rotation of young fronds, producing fine shreds. Meanwhile, the smallest shredding capacity of 612.66 kg/hour occurs at low rotation of old fronds and produces coarse shreds. These results provide essential insights into using coconut shredding machines based on the rotation level and the processed material. This research contributes to the development of efficient and effective coconut processing technology.
THE DEVELOPMENT OF THE COURSE MODULE OF MANUFACTURING ENGINEERING DRAWING FOR VOCATIONAL STUDENTS Riyadi, Andrian; Wibowo, Heri
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.66820

Abstract

This research developed a learning modules that fit the curriculum and determine the level of eligibility to be applied in learning of Manufacturing Drawing Engineering. This research applied  a Research & Development methode with the 4D model from Thiagaradjan, that are Define, Design, Develop, and Disseminate. The developed course module was validated by material and media experts which is presented using Likert scale. The results of the validation from the lecturers as material experts scored 3,33 in very feasible category, the validation from the lecturers as media experts scored 3,35 in very feasible category, the validation from the teachers as material experts scored 3,04 in feasible category, and the validation from teachers as media experts scored 3,35 in very feasible category. Products that have been developed and revised were tested on 30 students of XI class in Mechanical Engineering department of SMK Negeri 3 Yogyakarta by distributing evaluation questionnaires to find out the responses of students. The product got a score 3,58 from the students in very feasible category. The module received a very feasible evaluation from lecturers as a material and media experts, teachers as a media experts, and students. The module received a feasible evaluation from teachers as a material experts.
DESIGNING AN ON-GRID SOLAR POWER PLANT AT THE WOMEN'S DORMITORY BUILDING OF AVIATION POLYTECHNIC JAYAPURA Bernandos, Markus; Perangin Angin, Andi Frianto; Pratama, Faridh Surya
Jurnal Dinamika Vokasional Teknik Mesin Vol. 8 No. 2 (2023)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v8i2.67281

Abstract

Despite the abundance of solar energy potential in Indonesia, the utilization has not been optimal. PLN, as the state power grid provider, can not meet the increasing electricity demand in all regions of Indonesia. This research will discuss utilizing the potential of the On-Grid system PLTS planning on the Rooftop of the Jayapura Aviation Polytechnic Women's Dormitory Building in Tanjung Ria District, North Jayapura City. This PLTS design uses PvSyst programming to measure and analyze data from a complete solar PV system, aided by SketchUp Pro, to demonstrate 3D plan views. The result is data on the potential annual production of electrical energy, including the total energy produced, the energy distributed, and the value of the PLTS work ratio with data output. The configuration installed at the Poltekbang Jayapura women's dormitory is an AC Coupling On-Grid PLTS with 400 Wp Photovoltaic modules. From the PvSyst simulation that has been carried out, it can be obtained that the potential for electrical energy in the Jayapura Aviation Polytechnic Dormitory Building is 323,905 kWh / year with a PLTS capacity of 230 kWp with a Performance Ratio of 0,829.
FUEL PROPERTIES AND DIESEL ENGINE EXHAUST GAS TEMPERATURE OF BIODIESEL-CALOPHYLLUM INOPHYLLUM-ESSENTIAL OIL MIXTURE Gamayel, Adhes; Priyadi, Muhammad Untung Zaenal
Jurnal Dinamika Vokasional Teknik Mesin Vol. 9 No. 1 (2024)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v9i1.72267

Abstract

This research investigates the properties and performance of fuel blends comprising biodiesel, Calophyllum inophyllum oil (Nyamplung), and essential oils. Biodiesel, a renewable energy source, has gained significant attention due to its low sulfur content, high calorific value, and biodegradability. Experimental investigations involved blending biodiesel with Nyamplung oil and essential oils (clove oil, pine oil, and turpentine oil) in varying proportions. Fuel properties, including density, viscosity, and flash point, were analyzed to assess combustion characteristics. Additionally, engine performance parameters such as torque and exhaust gas temperature (EGT) were evaluated to understand combustion efficiency and engine health. The results revealed that the addition of Nyamplung oil and essential oils increased the density and viscosity of the fuel blends compared to pure biodiesel, impacting atomization and combustion processes. Despite higher viscosity potentially causing ignition delay, flash points decreased due to the presence of essential oils, enhancing safety during storage and handling. Torque measurements indicated variations in engine performance among fuel mixtures, with incomplete combustion observed in blends containing essential oils. EGT measurements further highlighted differences in combustion completeness, with lower temperatures observed in pure biodiesel due to improved atomization and complete combustion.

Page 15 of 19 | Total Record : 185

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