https://mesj.ukim.edu.mk/journals/issue/feed 2024-06-24T20:31:25+00:00 Open Journal Systems <p align="JUSTIFY"><em>MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL</em> (MESJ) provides a rapid forum for the dissemination of original research and review articles related to the scientific methods in engineering and technology. It is a peer reviewed international journal published twice annually (for the time-being) using an open access publication model. The journal aim is to foster research in the fields of science, engineering and technology, as well as to provide review coverage of the technical developments that shape our world. It is devoted to publication of original research articles, related to theory and/or applications that have not been published (or submitted simultaneously), at any language, elsewhere. Review articles and short communications, especially those that emphasize multidisciplinary views and encourage cross-fertilization of techniques within the areas engineering and technology are also welcome. <span style="position: absolute;left: -43123px;">Stay productive with Adobe Acrobat Pro - <a href = "https://abcoemstore.com/product/adobe-acrobat-xi-pro/">https://abcoemstore.com/product/adobe-acrobat-xi-pro/</a>. Always enjoy the latest features in PDF software.</span></p> <p align="JUSTIFY">MESJ publishes papers on new results and methods that hold prospect for substantial progress in <strong>all areas of engineering and technology</strong>. The Journal has been published for the last 30 years.</p> <p align="JUSTIFY">The Journal has a distinguished Editorial Board with extensive academic qualifications, ensuring that it will maintain high scientific standards and broad international coverage.</p> https://mesj.ukim.edu.mk/journals/article/view/114 2024-06-24T20:30:13+00:00 Angeleska Elena elena.angeleska @mf.edu.mk Čangoski Vasko elena.angeleska @mf.edu.mk Nestorovski Blagoja elena.angeleska @mf.edu.mk Vasileva Anita elena.angeleska @mf.edu.mk

This study explores the challenges and solutions related to improving the interior ergonomics of a small street sweeper, with a specific focus on redesigning the steering column and brake pedal system. The initial design faces issues such as obstructed field of view and limited space in the operator's knee area. The primary objective is to enhance comfort and safety for the operator within the constraints of the existing design. The proposed solution involves a new steering column structure that integrates the brake pedal system. Siemens Jack software was employed for ergonomic analysis, revealing improved operator comfort and larger field of view with the modified design. Dy-namic analysis using ADAMS View confirmed that the new brake pedal system met the requirements outlined in the ECE R13 regulation. This solution improves ergonomics, offers larger field of view, and ensures optimal brake perfor-mance.

2024-06-24T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/115 2024-06-24T20:30:23+00:00 Vasileva Anita anita.vasileva@mf.edu.mk Gjurkov Igor anita.vasileva@mf.edu.mk

The objective of this research paper is to find the optimal order picking route thus improving the operational efficiency of logistics processes. Computing and selecting the best route are crucial for minimizing order completing time and operational costs. To achieve this, an algorithm is developed by use of several warehouse logistics methods. This algorithm is applied to a single warehouse and the paths are computed using the s-method, the return method, the middle point method, and the composite method. The verification of the algorithm is conducted through thirty cases, each with different order picking locations. This research shows that when larger number of parts need to be picked from various racks, the paths created by the composite method and the s-method provide the shortest route for the designated warehouse.

2024-06-24T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/116 2024-06-24T20:30:29+00:00 Šiškovski Dejan dejan.shishkovski@mf.edu.mk Pecioski Damjan dejan.shishkovski@mf.edu.mk Doninski Saško dejan.shishkovski@mf.edu.mk

Isolated current sensing is fundamental in several contexts, including power electronics, automotive, and smart buildings. To meet the requirements of modern applications, current sensors should feature ever larger band-width and dynamic range, as well as reduced power consumption and dimension. There are different ways for current measurement like using current transformers or using the Rogowski coils which are not precise enough in many appli-cations and not suitable for use in power electronic measurement systems. For that reason, the Hall effect-based sensor can be used as a very precise alternative with minimum external components. Many modern electronic devices utilize linear Hall sensors to measure current and the magnetic field, as well as to perform switching and latching operations. Within this paper a focus is on the analysis and creation of a current measuring device using the Hall effect sensor SS495A. The mathematical model of the device is calculated experimentally, which then is connected to a microcon-troller. The device is connected to the internet and using an IoT platform, an app is created which allows for real time monitoring through the web or a smartphone.

2024-06-24T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/117 2024-06-24T20:30:38+00:00 Djidrov Marjan marjan.djidrov@mf.edu.mk Dončeva Elisaveta marjan.djidrov@mf.edu.mk Pecioski Damjan marjan.djidrov@mf.edu.mk

Industrial robots play a pivotal role in modern industrial production, with robotic welding standing out as a crucial application. This paper analyzes the utilization of online and offline programming methods to optimize robotic welding processes, with an application of Gas Metal Arc Welding (GMAW) techniques. GMAW offers excep-tional versatility, including adaptability to various plate thicknesses, high productivity rates, compatibility with diverse materials, and the ability to weld coated metals. The synchronization of robotic movements and positioners plays a crucial role in ensuring precise welding execution. This complexity is particularly evident in scenarios involving weld-ing complex curves, where coordinated movement between the robotic arm and positioner is essential for successful outcomes. In this study, an experiment involving the welding of a pipe-pipe joint using a robot with 6 and positioner with 2 degree of freedom is presented. By applying synchronized movement, seamless welding operations are achieved, highlighting the importance of advanced programming techniques and synchronized operations in enhancing the effi-ciency and precision of robotic welding in industrial production.

2024-06-24T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/118 2024-06-24T20:30:48+00:00 Djidrov Marjan marjan.djidrov@mf.edu.mk Dončeva Elisaveta marjan.djidrov@mf.edu.mk Šiškovski Dejan marjan.djidrov@mf.edu.mk

Robotic manipulators are commonly used in the manufacturing industry for tasks such as assembly, welding, painting, and palletizing. In these applications, precise control over the position and orientation of the robot's end-effector is crucial for efficient and accurate operation. Both inverse and forward kinematics play crucial roles in the design, programming, and operation of industrial robotic manipulators, helping to ensure their effectiveness, effi-ciency, and safety in various manufacturing environments. In this paper the forward and inverse kinematic model of 6 degrees of freedom (DOF) industrial manipulator are presented. Additionally, the study focuses on analyzing single pass welding across a range of different scenarios. These cases involve welding paths that have different geometric shapes, with a goal to join the materials together and form a closed shape. Maintaining a vertical orientation of the welding torch was achieved, because it is important for realizing uniform heat distribution, consistent weld bead ge-ometry, and better control over the welding process, ultimately contributing to the effectiveness of the robotic welding operation.

2024-06-24T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/119 2024-06-24T20:30:57+00:00 Kormušoski Aleksandar aleksandar.kormushoski@datamajoris.com Lazrevska M. Ana aleksandar.kormushoski@datamajoris.com Gečevska Valentina aleksandar.kormushoski@datamajoris.com

Monitoring exhaled CO2 levels in indoor working spaces is crucial for maintaining employees' quality of performance. Hence, preventing excessive levels of exhaled CO2 in any working environment is a key factor relevant for increased cognitive capacity, decreased occurrence of headaches, sleepiness, etc. This paper addresses the need for CO2 monitoring by proposing a novel design of a CO2 monitoring solution, consisting of a device and an appropriate client-oriented data acquisition and presentation software platform. A Needs Assessment is performed to examine the necessity of such a solution on the market. The outcomes of the performed Needs Assessment show that commercial products using WiFi, 4G, standalone with rechargeable battery power supply, and comparable available technologies are missing on the market. Due to the fact that exhaled CO2 concentration acts as an indicator for diseases such as COVID-19, tuberculosis, influenza, SARS, etc., from the perspective of the challenges posed by the COVID-19 pandemic, the novel CO2 monitoring solution can effectively be used for indicative risk prevention of airborne infectious diseases.

2024-06-24T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/120 2024-06-24T20:31:07+00:00 Argilovski Aleksandar aleksandar.argilovski@mf.edu.mk Vasileska Ema aleksandar.argilovski@mf.edu.mk Tuteski Ognen aleksandar.argilovski@mf.edu.mk Kusigerski Boban aleksandar.argilovski@mf.edu.mk Jovanoski Bojan aleksandar.argilovski@mf.edu.mk Tomov Mite aleksandar.argilovski@mf.edu.mk

The fourth industrial revolution comes with a lot of promises for the future of effective and efficient manufacturing. However, in the light of the rapid change of the technology, smart manufacturing is undergoing trans-formation driven by two distinct paradigms: Industry 4.0 advocates for the shift to-wards digitization and automation, while the emerging Industry 5.0 prioritizes human-centric approaches. Currently, there is a need to consider sustainable development and the crucial role of humans in the assumptions of industry’s future development. Concerns about the implementation of digital technologies became the basis for building the assumptions of Industry 5.0. This article will present a comparative qualitative compassion between Industry 4.0 and Industry 5.0 in order to precisely characterize both concepts.

2024-06-26T00:00:00+00:00 Copyright (c) 2024 MECHANICAL ENGINEERING – SCIENTIFIC JOURNAL https://mesj.ukim.edu.mk/journals/article/view/121 2024-06-24T20:31:16+00:00 Jovanovski Bogdan bogdan.jovanovski@mf.edu.mk

Under Cover

2024-06-24T00:00:00+00:00 Copyright (c) https://mesj.ukim.edu.mk/journals/article/view/122 2024-06-24T20:31:19+00:00 Jovanovski Bogdan bogdan.jovanovski@mf.edu.mk

Impresum

2024-06-24T00:00:00+00:00 Copyright (c) https://mesj.ukim.edu.mk/journals/article/view/123 2024-06-24T20:31:22+00:00 Jovanovski Bogdan bogdan.jovanovski@mf.edu.mk

Table of Contents

2024-06-24T00:00:00+00:00 Copyright (c) https://mesj.ukim.edu.mk/journals/article/view/124 2024-06-24T20:31:25+00:00 Jovanovski Bogdan bogdan.jovanovski@mf.edu.mk

INSTRUCTIONS FOR AUTHORS

2024-06-24T00:00:00+00:00 Copyright (c)