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Pengaturan Kecepatan Spindle Mesin Bubut Retrofit Menggunakan VSD (Variable Speed Drive)
Get PDFRetrofitted milling machines are usually not equipped with a gear box to control spindle rotation, so they will experience difficulties if varied spindle shaft rotation is desired. The commonly used way to adjust the rotation of the spindle shaft so that it can vary is by adjusting the rotation of the spindle drive induction motor using a Variable Speed Drive (VSD). The research started by removing the old single phase induction motor and replacing it with a three phase induction motor, then creating a control circuit so that the VSD could work automatically with commands from the breakout board. The rotation adjustment is carried out using a potentiometer installed on the VSD. Spindle shaft rotation is detected using a pulse meter which gets a signal from an inductive proximity sensor and is installed on the spindle shaft. Experiments during the research showed that the spindle rotation could be adjusted using VSD properly, starting from a speed of 0 rpm to 2000 rpm. The spindle experiences a decrease in speed when subjected to a load, most likely due to slippage that occurs from the drive pulley which is rotated by the drive induction motor to the spindle pulley because it uses a belt transmission
Pembuatan dan Analisa Performa Tekanan dan RPM Pada Komponen Swing Hidrolik Di Alat Peraga Mini Excavator
Get PDFThe Vocational School Education is a university-level higher education program that places greater emphasis on practical fieldwork relevant to industry needs rather than academic theoretical knowledge. In Indonesia, vocational school programs or diplomas play a crucial role in the development and scientific research. The creation of a mini excavator model is a research and innovation project aimed at supporting students\u27 practical training activities. The development of hydraulic swing components is used to enhance the components of the mini excavator model, which will later be expanded for educational purposes in the hydraulic drive system. The ultimate goal of this research is to manufacture hydraulic swing components that will be installed in the mini excavator model, with the final objective being to determine the pressure and rpm performance of these hydraulic swing components. Based on the conducted research, operating the mini excavator model requires a radius dimension or distance from the center point to the warning line of 3 m², and the maximum pressure for the mini excavator model is 150 kgf/cm², resulting in 11.17 rpm. Meanwhile, the allowable pressure for operating the hydraulic swing components in the mini excavator model is 100 kgf/cm², resulting in 8.54
Rancang Bangun Alat Pelurus Puncher Bar
Get PDFRound bar material with a diameter of 25,4mm is a type of material commonly used in the field of building construction and machinery spare parts. At PT. Vale Indonesia Tbk., this material is fabricated according to its design, which is called a puncher bar. A puncher bar is a tool used to clean the tuyere hole from nickel matte blockages in the PT converter section. Vale Indonesia. A series of cleaning processes can cause the puncher bar to bend at the ends or in the middle. The bent puncher bar was straightened manually in the production workshop of the Soroako Technical Academy. The process of straightening the puncher bar manually is considered less effective in terms of safety, time efficiency and worker productivity. The design of this machine consists of several components, namely the machine frame, electric motor, speed reducer, gears, towing roller, and towing roller. The stages of making a machine start from design, manufacturing, assembly, and testing. The puncher bar straightening machine has dimensions of 930 mm x 702 mm x 1129 mm with a main drive of a 5.5 HP electric motor with 1440 rpm. Vee belts and gears as rotation transmitters. The towing roller uses AISI 4140 alloy steel with a diameter of 5 inches and the guide roller uses mild steel with a diameter of 4 inches. This machine can straighten puncher bars with a maximum bend of 6 cm with a final bend of 1.5 cm with a processing time of 1 minut
JHCJ Editorial, Vol. 4 No. 1, Mei 2024
No full textJurnal Hukum Caraka Justitia merupakan jurnal ilmiah berkala yang dikelola oleh Fakultas Hukum Universitas Proklamasi 45 Yogyakarta dua kali dalam satu tahun. Jurnal ini dimaksudkan untuk mengumpulkan tulisan ilmiah, ringkasan hasil penelitian, resensi buku, atau ide-ide orisinal yang baru terkait dengan kajian ilmu hukum. Redaksi mengundang para pakar, praktisi, atau siapa saja yang memiliki kepedulian besar terhadap perkembangan ilmu pengetahuan di bidang hukum untuk mengirimkan karya-karyanya.
Jurnal Hukum Caraka Justitia is a periodical scientific journal organised by the Faculty of Law, Universitas Proklamasi 45 twice a year. This journal is intended to collect scientific writings, summaries of research results, book reviews, or new original ideas related to the study of law. The editors invite experts, practitioners, or anyone who has great concern for the development of science in the field of law to submit their works
Analisis Kekuatan Struktur Pada Desain Traction Rod Lokomotif Kereta Api Dengan Metode Finite Element Analysis (FEA)
No full textThe structural strength of locomotive bogies is crucial for bearing operational loads and absorbing engine vibrations to efficiently transmit torque to the train wheels. The traction rod, a critical component in this system, plays a key role in transferring power from the main engine to the locomotive wheels. With the CC300 locomotive engine producing 2.200 hp, the traction rod experiences significant loads, necessitating regular maintenance. Given that this component is currently imported, the company is striving to redesign the traction rod to ensure strong structural integrity for local production, reducing dependency on imports and optimizing maintenance costs. The redesign involves adding structures to the existing design to even out stress distribution and enhance safety factors. Finite Element Analysis (FEA) is utilized to compare the structural strength between the original and redesigned designs, resulting in significant improvements in load-bearing capacity and deformation reduction. Simulation results show variations in stress, deformation, and safety factors among the original design, the redesign by the company, and the redesign by the researchers. The original design exhibits a stress of 194,64 MPa, deformation of 4,2817 mm, and a safety factor of 1,2844. The company\u27s redesign achieves a stress of 438,37 MPa, deformation of 3.4356 mm, with a safety factor of 0,5703. Meanwhile, the researchers\u27 redesign shows a stress of 154,05 MPa, deformation of 4,4812 mm, and a safety factor of 1,6288
Literature Review : How to Examine the Mediating Factor of Government Role in Renewable Energy Adoption
Get PDFIndonesia is a blessed country with abundant renewable resources and the potential to manufacture up to 419 GWh of clean electricity for its people. The government plays a crucial role in shaping and nurturing the proper environment to support RE adoption and transition toward a sustainable economy. Various tools and dimensions are available to observe the government\u27s role in accelerating RE adoption. However, studies show that the metrics used to examine Indonesia’s government regarding RE adoption are lacking. This provides an opportunity to improve the metrics by referring to countries worldwide that show success in the particular research field. The current study aims to address the challenge by presenting a literature review of studies on the government\u27s role in RE adoption and extracting insight to develop improved metrics for examining Indonesia’s government\u27s role in RE adoption. Furthermore, we use data mining to visualize the research map of the current topic to provide an understanding of which areas are underexplored. Thus, future studies can refer to the results to contribute further to the literature
Perlindungan Hukum Notaris atas Kewajiban Menerapkan Prinsip Mengenali Pengguna Jasa (PMPJ) dan Laporan Transaksi Keuangan Mencurigakan (LTKM)
Get PDFThis research analyzes the legal protection of notaries regarding the obligation to apply the principle of recognizing service users and reporting suspicious financial transactions. This research study focuses on whether the obligation to maintain client confidentiality is absolute when faced with a notary\u27s obligation to implement PMPJ and LTKM. Second, what is the legal protection for notaries who implement PMPJ and LTKM obligations? This research is normative, the approach used is statutory and conceptual, and the legal materials used are primary, secondary, and tertiary legal materials collected using library research.
The research results show that first, the obligation to maintain client confidentiality is absolute as per the notary\u27s oath of office and UUJN provisions. The obligations of PMPJ and LTKM are the obligations of notaries who act based on contractual relationships with service users, selling and purchasing property, managing financial services and managing company accounts, and establishing, purchasing, and selling legal entities which are not the duties of a notary\u27s position. Second, legal protection for notaries who carry out PMPJ and LTKM obligations receive legal protection provided directly by the state. This form of protection is provided by the state to provide a sense of security for the reporter or witness from possible threats that endanger their person, life, and/or property, including their family. Notaries as reporters and/or witnesses also cannot be prosecuted either criminally or civill
Kebijakan Tentang Raperda Jogja Smart Province Pemerintah Daerah Istimewa Yogyakarta
No full textPresidential Decree Number 20 of 2006 Information and Communication Technology (ICT)-based government management known as E-Government is using information and communication technology in government processes to increase efficiency, effectiveness, transparency, and accountability in government administration. Management of government services using ICT is implementing electronic government based on ICT to improve government performance in its relations with society, the business community, and other related groups towards good and clean governance.
The research used in this research is descriptive with a qualitative approach. Meanwhile, data collection techniques use FGD techniques, observation, interviews, and documentation or literature study. Implementation of data collection methods is adjusted to the depth of information that must be explored and the availability of resources. The data taken to conduct this study consisted of primary data and secondary data. Primary data is data collected directly from the source and/or derived from direct measurements of the object of study through in-depth interviews with key figures.
The research results show that the vocabulary and concept of Jogja Smart Province have been mentioned a lot, becoming a measuring point in itself. From a normative juridical perspective, the scope and concept of a smart province already have a fairly strong legal basis. Either they are originating from central government policies or from the DIY Regional Government itself. However, several things need to be added and strengthened. Conceptually, there is a need to raise the level of regulations relating to Jogja Smart Province towards the formation of regional regulation, which begins with the drafting of a regional regulation
Evaluation of Solar-Powered Street Lighting Performance at Kamijoro Bridge, Yogyakarta
Get PDFIndonesia\u27s fossil fuel dependence has led to significant environmental problems, including greenhouse gas emissions, climate change, and ecosystem degradation. Given its location along the equator, Indonesia has enormous potential for harnessing solar energy. This research evaluates the solar insolation potential of solar-powered street lighting (PJU-TS) installed at Kamijoro Bridge, Yogyakarta. Solar radiation data were obtained from NASA POWER, while light intensity was measured in the field using a Lux Meter. Results show that average solar radiation intensity at the site was 251.87 W/m², equivalent to a theoretical energy yield of 163.77 kWh/day under ideal conditions with a 17% PV efficiency. Field measurements demonstrated that PJU-TS 3 achieved the highest illumination (589 Lux at 18:00 WIB), although the intensity declined throughout the night. Luminance calculations confirmed compliance with the Indonesian quality standard SKh 1.9.7. These findings demonstrate the viability of solar street lighting for public infrastructure and provide recommendations for improving system stability, monitoring, and maintenance
Work-life Balance, Keselamatan dan Kesehatan Kerja (K3), dan Turnover Intention: Studi pada PT Rakyat Makmur Nusantara
Get PDFThe research aims to test the influence of Occupational Safety and Health (K3) and work-life balance (WLB) on turnover intentions among millennial employees at PT Rakyat Makmur Nusantara. Sampling in this study used a purposive sampling technique where a sample size of 103 respondents was obtained. The analysis technique used in this research is multiple linear regression. Based on the research that has been conducted, it can be concluded that work-life balance has a negative influence on turnover intention, while K3 has a positive influence on turnover intention