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All Journal Sinergi FLYWHEEL : Jurnal Teknik Mesin Untirta JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) JTTM: Jurnal Terapan Teknik Mesin Automotive Experiences AME (Aplikasi Mekanika dan Energi) : Jurnal Ilmiah Teknik Mesin
Subekti Subekti
Universitas Mercu Buana
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Using a frequency vibration approach, examine the impact of screw rotor clearance on the screw housing in an 11kW compressor Tri Haryono; Deni Arif Rahman deni; Subekti Subekti; Abdul Hamid
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.405

Abstract

A screw compressor is one of the industrial machines needed for productivity and use in today's production. Industrial machines generally use pneumatic systems with the help of compressed air supplied by a compressor machine. The compressor working system must receive very special attention. Maintenance and prevention of damage to air screw compressor machines is very necessary, especially maintenance and prevention of damage to rotary screw air compressors. Problems that often occur with the shaft will result in reduced air supply flow or unstable air pressure resulting in disruption of the production line. The aim of this research was to discuss the vibration values produced against the rotor clearance from the ideal output on male and female screw compressor rotors using the frequency analysis method, taking the vibration values at the screw compressor housing point using an Accelerometer sensor and a Fast Fourier Transform (FFT) tool. The analyzer rotates at 1500 rpm in the X, Y and Z axes at each predetermined point. Research shows that the clearance is set at 0.03, 0.05 and 0.08. In this research, the high frequency sample values of 1x 25 Hz, 2x 50 Hz, and 3x 75 Hz often appear in each vibration data of 0.03 and 0.05, at the vibration frequency range value of 0.08 none appear. This shows the results that the ideal rotor clearance value is at a distance of 0.08 because there is no frequency graph of 1x, 2x, and 3x rpm at each point and axis on the end housing of the screw rotor compressor
Analysis of material incision in milling machine against workpiece by vibration method Kurtusi Muhamad; Subekti Subekti
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.552

Abstract

The Frais Machine is a piece of equipment used in manufacturing. To reach the specified production capacity, the machining process' time requirements must be more effectively managed. The goal of this study is to use the Fast Fourier Transform (FFT) technique to ascertain how changes in workpiece and spindle speed affect vibration. The milling machine utilized in this investigation is the Lushan Model ZX32, and the measuring device is a vibration analyzer coupled to an accelerometer sensor. Sengon Wood, PVC, and Aluminum 5052 are the workpiece varieties used. At spindle speeds of 95 and 150 rpm, the study's findings on aluminum material produced Y axis personal frequencies of 118 Hz with an amplitude of 15.12 mm/s2 and 144 Hz with an amplitude of 9.657 mm/s2. While PVC produced personal frequencies on the Y axis of 71 Hz with amplitudes of 12.11 mm/s2 and 40 Hz with amplitudes of 7.025 mm/s2 at spindle speeds of 95 and 150 rpm. Personal frequencies at 118 Hz with an amplitude of 10.9 mm/s2 and 74 Hz with an amplitude of 7.97 mm/s2 in the X axis are seen in wood materials with spindle speeds of 95 and 150 rpm. The findings demonstrate that differences in spindle rotation and workpiece have an impact on vibration; smaller vibrations are produced at higher rotation rates. Additionally, differences in the workpiece can impact tool life
Identification of misfiring in engine 1000cc using fast fourier transform analysis Erlangga Yorda Agustin; Subekti Subekti; Dayu Andryas Saputra
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.553

Abstract

Motorized vehicles are the primary mode of transportation in the neighborhood. An automobile is one of the motorized vehicles. Because of the mixing of air and gasoline, cars may move. The spark plug plays a crucial function in combustion because it ignites the mixture of fuel and air to generate combustion. Incomplete combustion will consequently result in misfiring. Damage to the spark plug, injector, and ignition coil are just a few of the things that might lead to misfiring. Therefore, due to misfiring, research on preventive maintenance for cars is required. Utilizing the vibration approach is one option. The combustion process in this study is stimulated by changing the 1000cc engine's speed. The engine speed ranges from 900 to 3500 revolutions per minute. The accelerometer sensor is then positioned vertically and horizontally on the machine's surface. According to this study, the first form mode's frequency at 900 rpm has an amplitude of 3,433 mm/s2 and occurs at a frequency of 69 Hz. In contrast, the first mode form occurs under typical circumstances at a frequency of 99 Hz and an amplitude of 1,254 mm/s2. Furthermore, at a rotational speed of 2500 rpm, the frequency in the first shape mode is abnormal at 69 Hz with an amplitude of . In contrast, under typical circumstances, the first form mode has a frequency of 249 Hz and an amplitude of 6,721 mm/s2. A frequency of 4x rpm was discovered for the rotational speed parameters of 900 rpm and 2500 rpm. This demonstrates that a misfiring-related bearing issue exists in the piston motor system.
Identification of ignition system coil damage on MPV 1000 CC vehicle using fast fourier transform Dayu Andryas Saputra; Subekti Subekti; Erlangga Yorda Agustin
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.554

Abstract

The coil is the main component of the vehicle in the ignition system. Therefore it is necessary to anticipate to maintain the performance of the coil so that it continues to function properly. One method that can be done is the vibration method. Vibration testing was carried out on a 1000 cc MPV vehicle with rotational variations of 800 rpm, 1500 rpm, 2500 rpm and 3500 rpm. Vibration testing is carried out using an accelerometer sensor connected to the FFT Analyzer to measure the vibration response, then an analysis is carried out using Matlab. From the research results obtained at the Y-axis point with a rotating speed of 1500 rpm the first shape mode appears at a frequency of 45 Hz with an amplitude of 1.357 mm/s2 under normal conditions. Whereas in abnormal conditions the first shape mode appears at a frequency of 41 Hz with an amplitude of 1,944 mm/s2. In abnormal conditions, damage due to bearing defects is obtained, this is due to the discovery of a frequency of 4x rpm at 1500 rpm rotation. Furthermore, at a rotational speed of 2500 rpm the measurement results on the engine show that the first shape mode appears at a frequency of 48 Hz with an amplitude of 2256 mm/s2 in normal coil conditions. Whereas in abnormal conditions the first shape mode appears with a frequency of 41 Hz with an amplitude of 4.176 mm/s2. The frequency at 82 Hz under abnormal conditions shown under normal conditions does not appear. This shows the occurrence of losses, because it occurs at 2x rpm at 2500 rpm rotation
Material analysis of tool feed on scrap machines using the vibration method Ahmad Kharis Surnadi; Subekti Subekti
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.565

Abstract

Flexibility comes from the cutting force generated when the workpiece and tool react and are moved to different areas of the scrap machine. The chisel will get damaged as a result. The material and cutting speed that are used can cause damage. Given this, further studies employing the vibration method are required to determine the ways in which material affects the speed at which scrap is chopped. PVC, iron, and aluminum 5052 were the materials used in this investigation. The cutting rotational speeds varied from 32 to 80 m/min. To measure vibration, the accelerometer is positioned along the x, y, and z axes. The measurement outputs of the accelerometer are connected to the FFT Analyzer, which performs analysis using Matlab. When comparing cutting speeds above or below 50 m/min, the research results indicate that the x-axis has the largest amplitude and the most form variants. The most widely used material is PVC, which is followed by iron and aluminum. This is because, unlike aluminum and iron, which have microstructures in the form of crystal grains, PVC is a thermoplastic polymer with a microstructure made of chain molecules. Because all of the cutting energy is used in the frictional action between the chip and the workpiece when the tool is being used, the high frequency is the result. As a result, the friction on the sliding plane is breaking up atomic or molecular bonds. Additionally, the cutting force exerts a significant amount of pressure on the tool's wearing active surface
Design of organic fertilizer pellet machine with a capacity of 170.90 Kg/Hour using verein deutcher ingenieure 2222 method Prasetio Aji Nugroho; Subekti Subekti; Arvian Iswahyudi
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.575

Abstract

Due to population expansion and heavy consumption, there has been an increase in household garbage in recent years. One of the waste processing techniques that is kind to the environment is turning organic waste into organic fertilizer. Pellets created from organic fertilizer will be more convenient to use and effective. This study aims to construct an organic fertilizer pellet printing machine using the VDI 2222 method to turn organic fertilizer into pellets. this design approach is used to make sure the finished product or system satisfies defined technical requirements and customer needs. A variation of the design for an organic fertilizer pellet machine has been created based on the research, and the design evaluation is based on a survey. The third machine variation was picked as the best machine variant based on the design's outcomes. This machine is made of materials that are generally accessible on the market, has a solid construction, and a simpler manufacturing procedure. The organic fertilizer pellet mill can produce 8 mm x 22 mm pellets at a rate of 170.90 kilograms per hour. An electric motor and coupler acting as a gearbox transmission link power this machine. UNP Steel was used to construct the framework to increase strength and lessen vibration
Effect of eccentric mass on rotor dynamics as a source of harvesting energy vibration Muhammad Noor Al-Fauzan Syahputra; Subekti Subekti; Nur Indah
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.855

Abstract

This research focuses on the potential for vibration energy from the use of eccentric masses in dynamic rotors to become an electrical energy source. Prior studies on eccentric mass in dynamic rotors were primarily concerned with examining the rotor's vibrational characteristics; however, little research was done on converting vibrational energy into electrical energy. The purpose of this study is to ascertain the maximum amount of electrical energy that can be produced by dynamic rotor vibrations using an eccentric mass. Utilizing an electromagnetic energy harvester, an experimental study is the methodology used. With a rotor rotation speed of 450 rpm, the eccentric mass variations used are 6.5 grams, 8.5 grams, and 10.5 grams. Matlab is used in this research to process data. The highest energy, using an eccentric mass of 8.5 grams, was found to be 24.15 mV. Nevertheless, this study shows that while the eccentric mass has an impact on the amplitude, it has no effect on the voltage. In order to increase and improve the efficiency of the electrical energy produced, further research on the utilization of vibration energy from dynamic rotors can be guided by the findings of this study
A Comparison of Hilbert and Fast Fourier Transform Techniques for Reciprocating Motors Abdillah Fatkhurrokhman; Subekti Subekti; Nur Indah
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.869

Abstract

Human existence has been significantly impacted by the growth of information and technology, particularly in relation to the requirement for effective mobility. But as a car ages, symptoms that affect its performance and safety start to show. These symptoms are a serious worry. Interference with car parts, such coils, is one issue that can have a major effect on driving safety and performance. Vibration analysis techniques have been successful in addressing this problem by detecting damage to different car parts. With the intention of comprehending piston motor vibration characteristics at different rotational speeds. The piston motor was used to collect vibration data at three distinct speeds: 900 rpm, 1500 rpm, and 3500 rpm. Both the Hilbert approach, which offers profound insight into frequency energy, and an FFT analyzer, which produces clear frequency spectrum information, were used in the analysis. The findings demonstrated that vibration characteristics changed in response to variations in reciprocating motor speed. On the other hand, the average frequency energy tends to remain constant across a range of speeds, suggesting that the features of reciprocating motors may be complicated and not very affected by variations in speed. According to this study, different perspectives on the vibration characteristics of piston motors operating at different speeds can be gained by utilizing vibration analysis techniques like FFT and Hilbert. Improved comprehension of this phenomenon could have a significant impact on maintenance initiatives and performance analysis of vehicles. To fully understand the complexity of vibration characteristics in reciprocating motors at various speed conditions, more research will be needed
Harvesting energy vibration derived from the rotational speed of a A 4-stroke engine Farezi Andriansyah; Nur Indah; Subekti Subekti
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.872

Abstract

The utilization of vibration energy from a 4-stroke engine as a potential source of electrical energy. Previous studies have focused on analyzing the vibration characteristics and frequency response functions of the 4-stroke engine, but there is a lack of research on harnessing vibration energy as a source of electrical energy. Therefore, this research aims to fill this gap by developing a system to harness the vibration energy from the 4-stroke engine, making it a primary focus of the study. The method employed is an experimental study involving data collection using an FFT Analyzer and Matlab. The research results indicate the presence of several mode shapes in the 4-stroke piston motor. The energy harvesting device utilized is of the electromagnetic type. However, the research reveals that the utilization of vibrations from the 4-stroke piston motor as a source of electrical energy is still not efficient and requires further development. There are various mode shapes in the 4-stroke piston motor at different rotational speeds, but the electromagnetic energy harvesting device used is unable to generate significant electrical energy. Therefore, this research provides a foundation for conducting further research in utilizing the vibrations of a 4-stroke piston motor as a more efficient source of electrical energy
Redesign of venting machine to reduce scrap defect crease in tires manufacture company Fajar Abdul Aziz; Subekti Subekti
JTTM : Jurnal Terapan Teknik Mesin Vol 5 No 1 (2024): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v5i1.878

Abstract

An apparatus for venting or perforating green tires in order to release trapped air is known as a-venting machine. Productivity will drop in May and July of 2023 as a result of scrap issues brought on by green tire defect creases. The term "defect crease" refers to a flaw in which the operator's manual hand rotation causes silicon to adhere to the side or tread ending of the green tire. Modifications were made with the intention of reducing scrap brought on by defect creases in order to lessen this issue. In order to eliminate the need for the operator to manually rotate the green tire, the roll driver that was initially fixed was replaced with one that can rotate automatically. The scrap defect decrease was 93.15% lower as a result of the modification, going from 73 ppm in the May–July 2023 period to 5 ppm in the September–November 2023 period
Co-Authors Abdillah Fatkhurrokhman Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Abdul Hamid Agung Dwi Prasetya Agung Dwi Prasetya Agung Wahyudi Biantoro Ahmad Kharis Surnadi Ahmad Zaki Maulana Alim Murwanto Andi Suryadi Ari Susanto Arvian Iswahyudi Basuki Dwi Efendi Basuki Dwi Efendy Basuki Dwi Efendy Basuki Dwi Effendy Darwin Sebayang Dayu Andryas Saputra Dayu Andryas Saputra Deni Arif Rahman deni Dimas Suharto Dimas Suharto Dimas Suharto Doni Revaldo Eko Saputra Eko Saputra Erlangga Yorda Agustin Erlangga Yorda Agustin Fajar Abdul Aziz Fajar Anggara Farezi Andriansyah Gian Villany Golwa Hadi Pranoto Haris Wahyudi Kurtusi Muhamad Monika Audiya Pratiwi Muhamad Fadhil Faali Muhamad Fadhil Faali Muhammad Ikhsan Muhammad Noor Al-Fauzan Syahputra Muhammad Nurul Hidayat Muhammad Nurul Hidayat Muhammad Nurul Hidayat Naufal Waliy Ishlah Naufal Waliy Ishlah Naufal Waliy Ishlah Nur Indah Nur Indah Nur Indah Nur Indah Nur Indah Panca Purwanto Prasetio Aji Nugroho R. Ariosuko Rio Duzan Octavianto Rita Sundari Salvatore Johanes Rega Salvatore Johanes Rega Salvatore Johanes Rega Setyo Qomarudin Yusuf Suryawan Wicaksono Tri Haryono Triwahyudin Rohman Triwahyudin Rohman Triwahyudin Rohman Tulus Supriyanto Usman Rosid Mashuri Yusuf Nugroho