Article Per Year (5 Year)
p-Index From 2020 - 2025
1.578
P-Index
This Author published in this journals
All Journal Patria Artha Technological Journal JURNAL CRANKSHAFT Industrika : Jurnal Ilmiah Teknik Industri ARMATUR : Artikel Teknik Mesin dan Manufaktur Journal of Mechanical and Electrical Technology
Sumarjo, Jojo
Unknown Affiliation
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 9 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 9 Documents
Search

 1 
Mengurangi cacat spot welding pada proses pembuatan tuas rem belakang type KWBF dengan metode Taguchi di PT. Ciptaunggul Karya Abadi Azzahra, Salsa Fatima; Nugraha, Iwan; Sumarjo, Jojo
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 4 No. 2 (2023): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v4i2.4181

Abstract

The process of joining the Rear Brake Arm to resistance spot welding or spot welding is known to be found not a few defective products, consequently, it is essential to carry out study with the goal of minimizing defects in the Rear Brake Arm. Then there is still more to be researched concerning the influencet of spot welding parameters, especially the strong current associated with welding heat and plate thickness affecting the mechanical characteristics of spot welding on low carbon steel, in order to know the most appropriate combination of variables between welding current, welding time and plate thickness used. This research uses carbon steel plates (SPCC-SD) with a length of 1000 mm, a width of 200 mm, and a thickness on the plate of 3.2 mm. This research is intended to get the right parameters for the level of welding defects in the spot welding process. Spot welding is welded with the parameters of strong current (A) 7.5; 9.5; 9.9, Welding time (s) 1. 5; 1.7; 19 and load (Kg) 8; 10; 14. The process of improvement with the taguchi method there are two methods, namely the avarage method obtained research results showing that with a strong current of 9.9 amperes, welding time 1.9 second, and a load of 14 kg produces a good percentage of success compared to other variables. The component that is particularly crucial in the process of spot welding on the manufacture of Arm Rear Brake is the strong current. Then the S/N ratio method obtained results that show the smaller the results the better, so the setting of the spot welding machine in the manufacture of Arm Rear Brake with a strong current of 9.9 Ampere, welding time 1.9 second, and welding load of 14 Kg.Based on the Taguchi method researchers can find out the factors that are very influential on the process of Resisntace spot welding or spot welding, namely strong current, welding time, and load. From the results of research using the Taguchi method, the following are the right machine settings in the spot welding process, namely with a current strength of 9.9 Amperes, welding time 1.9 seconds and a load of 14 Kg.
Pembuatan dan Instalasi Pengujian Turbin Screw dengan Variasi Debit Aliran Habibie, Zhafran; Sumarjo, Jojo; Setiawan , Reza
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 5 No. 1 (2024): Jurnal Armatur
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v5i1.5148

Abstract

Screw type water turbine is one type of water turbine that has the potential to generate electricity on a small scale that is environmentally friendly, where this screw type water turbine is very suitable for rivers and irrigation flows in the territory of Indonesia. In this study, data analysis is aimed at the characteristics of the output power of the Archimedes screw turbine against the opening of the stopcock valve and testing is carried out on the modeling of this Pikohydro power plant including measuring water discharge, generator rotation, voltage, current, torque and generator output power and efficiency. In the process of making and testing screw-type water turbines, the addition of a water reservoir frame and a Weir V-Nocth discharge measuring device that measures the height of the discharge and the height of the turbine head tested. This study took place to determine the performance of screw turbines by testing variations in water discharge, by testing the Stopkran opening with 3 variations, namely ½ (38 mm wide), ¾ (50 mm wide), 1 (76 mm wide) with each producing water discharge 0.0045 m3 / s, 0.0065 m3 / s, 0.0078 m3 / s. The turbine tilt angle used is 30º and the turbine head is 0.9 m. The process of testing the tool is carried out in the open and the presence of PLN electric current, the goal is to make it easier to fill the water reservoir using a dip pump. After testing and calculating the data, the maximum result of shaft rotation is 1470 rpm with an output power of 53.7 watts at a discharge of 0.0078 m3/s. and maximum torque produced was 4.428 Nm at a discharge of 0.0045 m3/s and the maximum turbine efficiency of 0.078% at a discharge of 0.0078 m3/s.
Evaluasi Optimasi Mesin Tonase 650 Ton Injection Molding Menggunakan Metode Overall Equipment Effectiveness Studi Kasus PT. XYZ Rivaldo, Andreyansen; Gusniar, Iwan Nugraha; Santosa, Aa; Sumarjo, Jojo
Patria Artha Technological Journal Vol 5, No 2 (2021): Patria Artha Technological Journal
Publisher : Department of Electrical Engineering, University of Patria Artha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33857/patj.v5i2.441

Abstract

Increasing productivity is very important for companies to get success in their buisness processes.There is one example of increasing productivity is to increase production productivity in a company. PT. XYZ has 13 Tonnage Injection Molding machines that operate every day, three of 650 Ton tonnage machines are the oldest and often experience Down Time. Factors that affect the productivity of the 650 ton injection molding tonnage machine are Availability, Performance Rate, and Quality Rate. This study aims to determine the evaluation of optimization and maintenance repair of three 650 tonne tonnage machines. The method we used is to find the value of Overall Equipment Effectiveness, then analyze and breakdown the Down Time data and finally Fishbone analysis to find out the factors causing it. The result of this research is a data value of Overall Equipment Effectiveness for 10 days is 42.71% and the main focus of the factors causing Down Time is the machine factor and packaging loss. With the holding of this research, the researcher hopes to provide a detailed reference for PT. XYZ to make improvements or improvisations related to production productivity in the future.
Rancang Bangun Kipas Angin Otomatis Berbasis Arduino Wahyudin, Muhammad; Sumarjo, Jojo; Santoso, Deri Teguh
JURNAL CRANKSHAFT Vol 7, No 2 (2024): Jurnal Crankshaft Vol.7 No.2 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v7i2.12359

Abstract

Dalam beberapa dekade terakhir, pemanasan global dan perubahan iklim telah mempengaruhi berbagai aspek kehidupan manusia, termasuk kesehatan dan kenyamanan. Salah satu dampak langsung adalah fluktuasi suhu tubuh manusia. Untuk mengatasi masalah ini, penelitian telah dilakukan untuk mengembangkan alat yang dapat membantu menstabilkan suhu tubuh manusia. Salah satu alat tersebut adalah kipas angin. Namun, banyak kipas angin yang digunakan saat ini masih beroperasi secara manual. Penelitian terbaru telah mengembangkan sistem kipas angin otomatis yang memanfaatkan sensor suhu DHT11 dan dikendalikan menggunakan Arduino Uno. Penelitian ini menambahkan fitur otomatisasi, memungkinkan kipas angin untuk beroperasi tanpa perlu intervensi manusia. Tujuan utama dari penelitian ini adalah untuk membantu manusia dalam menghidupkan dan mematikan kipas angin secara otomatis.
Analisis Pengaruh Draft Blower terhadap Kestabilan Temperature di Ruang Bakar Mesin Smelter guna Memaksimalkan Hasil Produksi di PT YNX Saputra, Muhammad Daris; Sumarjo, Jojo; Sena, Boni
JURNAL CRANKSHAFT Vol 7, No 2 (2024): Jurnal Crankshaft Vol.7 No.2 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v7i2.12387

Abstract

PT YNX, perusahaan yang mengkhususkan diri dalam produksi Frit, bahan baku untuk kaca dan keramik. Proses produksinya melibatkan beberapa tahap sebelum produk akhir dijual. Dimulai dari penimbangan bahan baku, pencampuran sesuai formula, proses smelter dengan suhu maksimal 1650°C, pendinginan, hingga proses bagging. Selama pemurnian bahan baku, alat pendukung seperti blower digunakan untuk mengalirkan fluida gas melalui pipa dengan tekanan tertentu. Fan, blower, dan kompressor berperan penting dalam menggerakkan udara dan mengatur tekanan sistem. Hasil optimal dicapai pada suhu 1541°C dan 1310°C dengan rear gas dan oksigen yang masuk sesuai proporsi.  
Rancang Bangun Pintu Otomatis Menggunakan RFID dan Sensor Ultrasonik HC-SR04 Harahap, Maruli Hadiatma; Sumarjo, Jojo; Santoso, Deri Teguh
JURNAL CRANKSHAFT Vol 7, No 2 (2024): Jurnal Crankshaft Vol.7 No.2 (2024)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v7i2.12389

Abstract

 Penelitian ini berfokus pada pengembangan sistem pengunci pintu otomatis yang lebih efisien dan aman dibandingkan dengan kunci konvensional. Sistem ini dirancang menggunakan Arduino dan sensor RFID untuk mendeteksi keberadaan objek hingga jarak maksimal 3 meter. Tujuan penelitian ini adalah merancang dan membangun pintu otomatis serta sistem keamanan yang efektif dengan sensor RFID. Metode riset dan pengembangan digunakan dalam penelitian ini, melibatkan sembilan tahap, mulai dari identifikasi masalah hingga analisis data. Hasilnya, sistem ini dapat mendeteksi objek hingga jarak 3 meter dengan output sensor sebesar 3.4 Volt DC. Sistem ini diharapkan dapat mempermudah pengunjung dengan pergerakan manusia yang menjadi objek deteksi. Dengan demikian, sistem ini menawarkan solusi praktis dan efisien untuk meningkatkan keamanan rumah dengan banyak pintu.
Analisis Frame Sepeda Listrik Roda Tiga Bagi Lansia dan Penyandang Disabilitas Menggunakan Metode Elemen Hingga Rayyan, Lazuardy Azfa; Sumarjo, Jojo; Pratama, Firza Adhi
Metrotech (Journal of Mechanical and Electrical Technology) Vol 4 No 3: September 2025
Publisher : Fakultas Sains dan Teknologi, UNIRA Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/metrotech.v4i3.7358

Abstract

Desain rangka sepeda listrik roda tiga belum sepenuhnya mempertimbangkan kebutuhan khusus lansia dan penyandang disabilitas, terutama dari aspek kekuatan struktur, efisiensi berat, dan stabilitas berkendara. Penelitian ini menganalisis kekuatan statik rangka sepeda dengan tiga jenis variasi material, yakni Aluminium 6061, Aluminium 7075-T, dan Magnesium AZ61A-F. Simulasi dilakukan menggunakan metode elemen hingga (FEM) melalui perangkat lunak SolidWorks dan Ansys Workbench, dengan parameter evaluasi meliputi tegangan Von Mises, deformasi total, dan faktor keamanan. Hasil simulasi menunjukkan bahwa seluruh material memiliki tegangan maksimum di bawah yield strength masing-masing, serta nilai faktor keamanan di atas standar ISO 4210:2023. Aluminium 7075-T memberikan performa terbaik dengan deformasi paling rendah (0,2550 mm) dan faktor keamanan tertinggi (12,994), sedangkan Magnesium AZ61A-F unggul dari sisi densitas material, meski disertai deformasi lebih besar. Aluminium 7075-T direkomendasikan sebagai material optimal karena memberikan keseimbangan antara kekuatan struktural, kekakuan, dan efisiensi keamanan, sesuai dengan kebutuhan pengguna berkebutuhan khusus.
Analisis Perhitungan Overall Equipment Effectiveness dan Diagram Fishbone pada Mesin Slitter di PT XZ Lubis, Dinda Putri; Sumarjo, Jojo; Hanifi, Rizal
Industrika : Jurnal Ilmiah Teknik Industri Vol. 9 No. 4 (2025): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/qvv8gk65

Abstract

This research discusses the analysis of Overall Equipment Effectiveness (OEE) calculations on slitter machines at PT. XZ which focuses on increasing production efficiency and effectiveness. As market demand for high quality and productivity increases, it is important to evaluate machine performance to identify areas for improvement. The aim of this research is to understand how OEE can be used to assess the effectiveness of slitter machines and the factors that influence their performance. The methods used in this research include direct observation, collecting machine performance data, and analysis using the OEE formula which includes availability, performance and quality. The analysis results show that the average OEE of the slitter machine is 90.36%, which shows that the machine is operating at a good level of efficiency. However, there are several inhibiting factors identified through the fishbone diagram, such as unexpected machine breakdowns, delays in material delivery, and lack of operator training. The main conclusion of this study emphasizes the need for proper maintenance and operator awareness in maintaining heavy equipment to increase overall effectiveness and productivity. Keywords: Fishbone Diagram, Machine Performance, Overall Equipment Effectiveness, Production Efficiency, Slitter Machines
Analisis Pembuatan Trial Part Action Bracket Support Menggunakan Material SPHC dengan Metode FMEA dan Fishbone Diagram Sayful Arif; Sumarjo, Jojo; Aripin, Aripin
Industrika : Jurnal Ilmiah Teknik Industri Vol. 9 No. 4 (2025): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/3jgwr218

Abstract

This research was conducted at PT Tri Jaya Teknik Karawang to analyze the constraints in making trial part action bracket support using SPHC T=3.2 material.  This research is important because the trial part process is a crucial stage in ensuring production efficiency and product quality before entering the mass production stage, this research can reveal the root causes of defects, determine the main risk factors, and provide effective improvement recommendations. By applying the FMEA method, companies can reduce product defect rates, improve production efficiency, and optimize the use of resources. The Failure Mode and Effects Analysis (FMEA) method and fishbone diagram are used to identify failures, causes, and determine the highest failure value. This research plays a role in improving production efficiency by reducing the number of defective products that can cause waste of cost and time. The results show that the failures that have the highest Risk Priority Number (RPN) value are thread damage and off-center hole position with an RPN value of 180. Fishbone diagrams identify the main factors causing failures which include tapping, drilling, bending, and operators. Keywords: Failure Mode and Effects Analysis (FMEA), Fishbone Diagram, Manufacturing, Trial Part
Co-Authors Aripin Azzahra, Salsa Fatima Deri Teguh Santoso Gusniar, Iwan Nugraha Habibie, Zhafran Hanifi, Rizal Harahap, Maruli Hadiatma Lubis, Dinda Putri Muhammad Wahyudin, Muhammad Nugraha, Iwan Pratama, Firza Adhi Rayyan, Lazuardy Azfa Rivaldo, Andreyansen Santosa, Aa Saputra, Muhammad Daris Sayful Arif Sena, Boni Setiawan , Reza