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Jurnal Teknologi
Published by Universitas Muhammadiyah Jakarta
ISSN : 20851669     EISSN : 24600288     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering
This journal is a scientific journal to develop knowledge in the field of Engineering & Technology. Editors invite professionals from education and researcher to write about the progress of science in the field of Engineering & Technology. The journal is published 2 (two) times in 1 year.
Arjuna Subject : -
Articles 318 Documents
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Raw Material Control of TCC Using MRP with The Implementation of Safety Stock and Forecasting Methods Muhammad Farhan Rusdy Setiawan; Winarno; Wahyudin; Billy Nugraha; Naufal Rabbani Sumitra
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.177-186

Abstract

In the increasingly competitive automotive industry, effective raw material control is essential to achieve cost efficiency, maintain production continuity, and ensure accurate distribution. PT XYZ, an automotive manufacturing company located in Karawang, faces several challenges, including high demand fluctuations, dependence on imported raw materials, and the absence of safety stock calculations, which increase the risk of inventory shortages. This study aims to determine the optimal raw material planning method by integrating demand forecasting and Material Requirement Planning (MRP) using the Lot for Lot (LFL) technique in the production of the KWU-type Timing Chain Cover (TCC). This research employs a quantitative case study approach, with data collected through observation, interviews, documentation, and literature review. Demand forecasting is conducted using Double Exponential Smoothing, Moving Average, and Linear Regression methods. The most accurate forecasting method is then used as an input for preparing the Master Production Schedule (MPS) and MRP. The results indicate that the Linear Regression method provides the highest forecasting accuracy, as indicated by the lowest Mean Squared Error (MSE) value of 2,075,786,061. Furthermore, the implementation of MRP using the Lot for Lot technique combined with safety stock calculations proves effective in reducing the risk of stockouts. This improvement is reflected in the stabilization of inventory levels, such as the water pump bearing component, which previously experienced zero stock conditions and is now maintained at a safety stock level of 37,770 units. In conclusion, the integration of Linear Regression forecasting and Lot for Lot-based MRP enhances planning accuracy, ensures raw material availability, and supports long-term operational efficiency at PT XYZ.
Strength Analysis of a Pulp Brick Making Machine with a Capacity of 20 kg/Hour Bambang Setiawan; Hendro Purwono; Rasma; Gunawan Hidayat; Sri Anastasia Yudistirani
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.197-204

Abstract

Paper is one of the communication tools for administration, and is still the primary choice. In various parts of the world, paper is always used in the fields of economics, education, and so on. From the large number of paper uses, it will have an impact on the amount of paper waste that will be collected, then to meet every paper need, new paper must be produced. One solution in utilizing paper waste that can be done in the home industry is by using a pulp-making machine with unused paper or waste that has been collected to be reused in recycling paper into paper or innovative ones such as pulp bricks. The purpose of this study is to design a model of a pulp-making machine with a frame size of 1100 mm x 800 mm x 835 mm. The design of this machine frame was made to determine the load strength experienced by the frame on a pulp brick-making machine. This study uses load calculations on the frame construction design manually and with the help of the SolidWorks software. The results of the simulation using the software show a maximum von misses value of 410700N/m2 and a safety factor value of 2682.56 N/m. Thus the automatic dishwasher frame is in the safe category.
Strength Analysis of a 3-Joint Robogripper Robot Manipulator System Prototype for Lifting 50 Gram Goods Gunawan Hidayat; Hendro Purwono; Rasma; Bambang Setiawan; Sri Anastasia Yudistirani
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.187-196

Abstract

The design of a 3-joint robogripper system manipulator hand robot for a maximum lifting capacity of 50 grams has a lifting and transport capacity for workpieces with a maximum weight of 50 grams using a servo motor mounted on a robot frame made of acrylic material and can rotate 180 ̊ with a maximum reach of 500 mm. process that still heavily relies on human labor in the manufacturing industry is lifting and transporting, particularly in the jewelry industry. This requires the operator's expertise to lift and transport the jewelry without leaving fingerprints on the surface and into the packaging.To meet the needs described above, a change in the work process is necessary. This change reduces the operator's skill requirement and can reduce human error, which can lead to product failure during quality control.Based on the shortcomings of the previous work process described, a lifting and transporting machine is needed that achieves maximum results without relying on operator skill and in shorter processing times. One machine that can be implemented to achieve the desired results is the robogripper robotic arm.The design of a 3-joint robogripper system manipulator hand robot for a maximum lifting capacity of 50 grams has a lifting and transport capacity for workpieces with a maximum weight of 50 grams using a servo motor mounted on a robot frame made of acrylic material and can rotate 180 ̊ with a maximum reach of 500 mm. and 250 mm from the center point of the robot. This hand robot aims to be a gold bar lifting tool with a maximum capacity of 50 grams so that it can reduce the number of rejects in the form of A fingerprints on the surface of goods caused by manual.
Implementation of IoT-Based Flood Emergency Application System (SADARI) for Real-Time Monitoring and Early Warning System in Dringu Probolinggo District Afrikhatul Maulidiyah; Muhammad Imron Rosadi; Muhammad Faishol Amrulloh; Arief Andy Soebroto
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.205-212

Abstract

Floods are hydrometeorological disasters that often occur in urban areas due to limited drainage capacity and high rainfall intensity. Delay in information on water conditions is one of the main factors in low preparedness for potential floods. This research aims to implement the Internet of Things (IoT)-based Flood Emergency Application System (SADARI) as a real-time monitoring and early warning system in Dringu District, Probolinggo Regency. The developed system integrates water level sensors and rainfall sensors, data loggers, and GSM-based communication modules for continuous data transmission. The research method uses a Research and Development (R&D) approach which includes the design, implementation, and testing stages of the system. The results of the implementation show that the system is able to monitor water levels in real-time and classify conditions into safe, alert, and hazard statuses. In field tests, the system successfully detected variations in water levels from normal (±16 cm) to dangerous conditions (±181 cm) and sent automatic notifications via Telegram Bot in a timely manner. In addition, the system is supported by an independent power supply so that it can operate sustainably in the field. Thus, the SADARI system can be an effective solution in supporting flood mitigation, improving community preparedness, and providing information on environmental conditions quickly and accurately.
Prototype of an ESP32-Based Internet of Things Trash Vessel with Integrated Solar Cell Charging Handoko Rusiana Iskandar; Hendriyana; Fadillah Arianto; Firman Ramdhani Putra; Lisman Khosiban; Ibnu Supriatna; M. Ansel Wardana
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.149-164

Abstract

The global issue of increasing amounts of waste in water areas has been very detrimental to the environment and has become a serious concern due to its impacts, especially on water quality, which can disrupt aquatic ecosystems and cause public health problems. Current conventional cleaning methods still rely on manual labor, which is time-consuming and inefficient. This study proposes a solar cell-based and Internet of Things (IoT)-enabled waste transport vessel and utilizes sensors in its design. This prototype was built using an ESP32 microcontroller as the main control unit, two HC-SR04 ultrasonic sensors for waste detection and container level monitoring, servo-based waste pickup, and a DC motor-driven conveyor. Remote monitoring and supervision are implemented through the Blynk IoT platform, enabling actual and real-time system observation. The prototype was built and evaluated, showing an average response time of 4.0–5.2 seconds across various types of waste samples; sensor calibration yielded good linearity (R² = 0.9987) and an average distance error of only 2.08 mm. Stable buoyancy testing where the prototype was able to hold a total mass of 1.73 kg. The solar cell successfully charged a parallel Li-ion 18650 battery bank from 3.40 V to 3.75 V over a period of 5 hours, resulting in a near-neutral daily energy output (~3.43 Wh consumption vs. ~3.38 Wh generation). IoT telemetry successfully monitors and stores data in the cloud efficiently. These results enhance operational reliability, energy efficiency, and control systems that benefit the environment, making this technology a promising solution for sustainability and addressing environmental issues, particularly in aquatic environments. Further research is expected to focus on real-world, dynamic field applications by integrating multi-sensor data and waste classification.
A Comprehensive Computational Fluid Dynamics (CFD) Analysis of the Effect of Blade Number on the Performance and Rotational Characteristics of Hydrokinetic Turbines Rachman , Aditya; Samhuddin; Kadir, Abdul; Ramadhan, Anwar Ilmar; Firmansyah
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.131-148

Abstract

The number of blades in hydrokinetic power systems is a fundamental aspect of their design. This number affects not only the investment and mechanical loads but also the performance and rotational characteristics. The relationship between the number, performance, and rotational aspects is complex, however there are currently insufficient explanations for this connection. This study examines the complex interaction between them using a steady Computational Fluid Dynamics (CFD) method based on Reynolds-Averaged Navier-Stokes (RANS) simulation. The results suggest that turbines with a higher number of blades are more effective than those with a smaller number in regions where the Tip Speed Ratio (TSR) is less than 3. Above this range, turbines with lower blade numbers perform more effectively than ones with higher numbers. The study indicates that increasing the surface area of the turbine blades can efficiently boost the torque generated at low TSR levels, leading to high-performance turbines with a higher blade number. However, when the turbine's TSR is high, an intricate flow phenomenon takes place. This phenomenon is caused by the excessive number of blades, which generates a blockage effect that changes the direction and strength of the flow over the blade. As a result, the lift decreases. This work provides novel insights into the mechanism that governs the performance and rotational properties of turbines with varying numbers of blades. Engineers can derive advantages from comprehending the effect of blade number when choosing the generator and the transmission of hydrokinetic power systems.
Developing an IoT-Powered Sea Turtle Egg Incubator to Increase Survival Rate Alex Surapati; Ade Sri Wahyuni; Gusta Gunawan
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.18.2.213-222

Abstract

The turtle population in Pekik Nyaring Village, Bengkulu, is vulnerable to temperature, humidity, and predator threats when natural hatching methods are employed. Only around 50% of hatchlings successfully hatch as a result, and environmental instability and human exploitation are major factors. The goal of this project is to create an Internet of Things (IoT)-based egg incubator that uses an ESP32 microcontroller and a DHT22 sensor to monitor and regulate humidity (45–48%) and temperature (26–33°C) in real time. The system's WhatsApp notifications and integration with an IoT platform (Blynk) allow for remote monitoring and increase the effectiveness of sea turtle conservation initiatives. The gadget serves as an automated incubator that evaluates sensor efficacy and offers a technical solution that the community may readily embrace. A review of the literature on hatchling physiology, system design with block diagrams and hardware-software integration, sensor validation testing, system reaction tests, and field tests with 80 sea turtle eggs are all included in the study. Due to uneven heat distribution, restricted sand capillarity, local temperature rises brought on by incandescent bulbs, and sluggish water vapor diffusion processes within the media, the research results, while successful in hatching the eggs, were not ideal.
Application of a Peeler Blade and Adaptive Spring Mechanism in a Tuber Peeling Machine Fadwah Maghfurah; Farhan Rian Ramadhan; Windarta
Jurnal Teknologi Vol. 18 No. 2 (2026): Jurnal Teknologi
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The development of friction-based tuber peeling machines requires an integrated approach involving mechanical design, theoretical analysis, and experimental validation to achieve an optimal balance between productivity and peeling quality. This study aims to design and evaluate the performance of a tuber peeling machine incorporating a peeler blade and an adaptive spring-loaded mechanism. The methodology included kinematic analysis, belt–pulley transmission design (2:1 transmission ratio producing a shaft speed of 710 rpm), motor torque and power calculations (effective torque of 4.48 N·m), friction and normal force analyses as the primary peeling mechanisms, and structural evaluations of the machine frame and shaft. The analytical results indicated that the ASTM A36 steel frame exhibited a maximum bending stress of 10.2 MPa, a factor of safety of 24.5, and a maximum deflection of 0.77 mm. Meanwhile, the shaft experienced a deflection of 0.22 mm and operated at only 35% of its critical speed (2015 rpm), confirming both structural and dynamic stability. Experimental validation demonstrated that processing capacity increased with rotational speed, reaching a maximum value of 17.83 kg h⁻¹ at 400 rpm compared with 13.67 kg h⁻¹ at 300 rpm. In contrast, peeling efficiency exhibited a non-linear trend, achieving an optimum value of 95.67% at 300 rpm and decreasing significantly at 400 rpm, particularly for potatoes (75.70%), due to the occurrence of over-cutting. These findings reveal a trade-off between processing capacity and peeling efficiency, indicating that optimal machine performance depends on both material characteristics and operating conditions. Overall, the developed peeling system demonstrated stable operation, adaptive performance, and compliance with technical and functional requirements for small- to medium-scale agricultural processing applications.

Page 32 of 32 | Total Record : 318

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