Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics)

Comparison of Power Consumption Between Krisbow Lathe Type KW 15-486 and Krisbow Lathe Type C0636AX1000

T Towijaya — 2025-10-10

Electrical power consumption in turning machines is a critical factor affecting manufacturing efficiency, primarily influenced by process parameters such as spindle speed and depth of cut. This study aims to compare the electrical power consumption of two types of turning machines—Krisbow Type KW 15-486 and Krisbow Type C0636AX1000—under varying spindle speeds and cutting depths. The workpiece material used was ST-40 steel. Electrical power data were obtained from empirical current measurements during the turning process and subsequently converted into theoretical power values. Experimental variations included spindle speeds of 65, 180, 235, 400, 700, and 1000 rpm, and cutting depths of 1 mm and 2 mm. The results revealed that increasing spindle speed generally led to a decrease in electrical power consumption up to a certain point, after which, at speeds above 700 rpm and 1000 rpm, power consumption tended to rise again. In contrast, greater cutting depth consistently resulted in higher power consumption. The findings demonstrate distinct energy consumption characteristics between the two turning machines, providing valuable insights for selecting machine types based on energy efficiency considerations.

THE EFFECT OF EXTRUSION MACHINE TEMPERATURE ON MECHANICAL PROPERTIES OF FILAMENT PRODUCED FROM RECYCLED PLA

Nanang Ali Sutisna — 2025-10-10

Fused Deposition Modelling (FDM) technology often known as 3D printing, is the most frequently used in additive manufacturing technology for polymeric material and has a wide range of application in numerous industries. In this method, the product is created by heating thermoplastic filament, extruding it through a nozzle and layer by layer depositing on the build plate of 3D printer. Also in making 3D printing product, it usually requires support which is the backbone of a 3D printing product and usually those things are would be discarded and turns the filament into waste. The research is to study the effect of extruding temperature on recycled PLA filament on mechanical properties. The experiment result shows that recycled PLA filament with extruding temperature of 170˚C, 175˚C, and 180˚C has UTS value 61.3 MPa, 64.4 MPa, 42.9 MPa respectively, compared to commercial PLA filament has UTS value of 76.9 MPa. It can be observed that the trend is decreasing, the UTS value of recycled PLA filament at 170˚C, 175˚C, and 180˚C decreased from commercial PLA filament about 20.2%, 16.2%, and 39.5%, then it can be concluded that the best temperature for making recycled PLA filament and has strength closes to commercial PLA filament is 175˚C. So it produces good diameter of the filament. The optimum setting for printing the filament is at 190˚C it produces the smoothest result of the object wall compared to the other two parameters.

Designing and Testing Modular Karakuri Dynamic and Static Rack for Autonomous Material Handling Efficiency

Mohammad Azwar Amat — 2025-10-10

This study addresses the gap in modularizing Karakuri dynamic trolley racks and static two-level racks for autonomous material handling by developing an optimized design framework to enhance mechanical reliability and material flow efficiency. Two designs were proposed, Design-A and Design-B, with selection based on budget savings and design simplification for integration with Automated Guided Vehicles (AGVs). Mechanization analysis focused on critical mechanical components, while performance tests assessed box transfer times and speeds under loads of 5, 10, and 15 kg on dynamic trolleys and 0 kg on static racks. Design-B was selected for its 50% reduction in material usage, elimination of compressed air dependency, and a mechanical stopper system enabling simultaneous box movements, unlike Design-A’s sequential pneumatic process. Performance tests across Tracks B, C, D, and E revealed wooden boxes achieving higher final speeds (0.7-0.8 m/s) than plastic boxes (0.53-0.6 m/s) on Track B due to smoother surfaces, with speeds ranging from 0.25 m/s to 1.74 m/s across tracks, influenced by initial speed and queue position. Design-B’s swing mechanics and triggers ensured reliable, adaptable box movement with minimal oversupply risks. These findings validate Design-B as a cost-effective, scalable solution for autonomous material handling in lean manufacturing environments.

DESIGN AND ANALYSIS OF DRUM BRAKE PADS FROM PALM KERNEL SHELL COMPOSITE BY USING REVERSE ENGINEERING AND FINITE ELEMENT METHOD

Dhiya Luqyana — 2025-10-10

The braking system is an important component of a vehicle. This is closely related to global vehicle accident data, which reaches 1.35 million per year, so a braking system with the right material composition is needed. There are two types of braking systems: disc brakes and drum brakes. Among these two types of materials, disc brakes are commonly used in braking systems for both four-wheeled and two-wheeled vehicles. However, disc brake systems are more expensive than drum brakes. The development of drum brakes aims to achieve a more cost-effective and efficient braking system. In this study, the type of brake being researched is the drum brake system on motorcycle. The old brake pad type requires development in both structure and material because the old brake pad model requires the entire brake pad assembly to be replaced when the brake pad is worn out. If the brake pad with the mounting bracket can be disassembled and reassembled when the brake pad is worn out, the brake fabrication cost can be reduced by 10-30%. Through a reverse engineering approach for development, a new brake pad design that can be disassembled and reassembled was obtained. Furthermore, material updates using natural fiber composites were employed for more environmentally friendly brake pads. Palm kernel shell (PKS) composite was selected due to the abundance of palm oil waste from plantations in Indonesia. The composite composition and material properties of PKS were referenced from previous research. Finite element method (FEM) analysis using ANSYS was conducted to understand how the PKS composite performs during braking. The results of the ANSYS test indicate that PKS material has potential for experimental testing through direct material testing. stress values, and temperature enable better absorption of braking heat during braking, indicating that further research can be conducted.

Preliminary Design of a Local Bamboo Shaving Mechanism for Improve Domestic Stick Production

Rolan Siregar — 2025-10-10

Indonesia has abundant natural resources such as bamboo. Almost throughout Indonesia, bamboo growth can develop well, but bamboo processing is relatively low and even bamboo products are still widely imported from abroad such as bamboo sticks. So, in this study, a bamboo stick production machine design was carried out as an effort to improve domestic technology. Furthermore,
observations were made on the quality of local bamboo sticks produced by the machine. The method used is product design which is continued to the machine manufacturing process. After the machine is finished being manufactured, a qualitative analysis of the local bamboo sticks produced by the machine is carried out. The results of the study showed that the bamboo stick production machine
can work according to expectations. Of course, continuous optimization needs to be carried out so that appropriate domestic technology is obtained that is useful for the community which is called a domestic product. Furthermore, based on observations of the bamboo sticks produced, it can show great potential for use in various ways. But it needs to be continued to achieve maximum quality. Ultimately, technological independence in bamboo processing can contribute to national development from the agricultural sector.

Design Implementation of Integrated Sensors for Weather Detection and Monitoring Systems

Joni Welman Simatupang — 2025-10-10

Data of weather are important to obtain as it yields some benefits from knowing it. One of them being evacuation from disasters. For example, if there is a typhoon, we know the direction where it is heading. Another one being helping the work of weather forecasts. Data taken can be used to forecast if temperature in the next days will increase or decrease, and if the weather changes. To obtain those data, we need sensors. Most sensors cannot measure all weather data individually, which means that to measure more of those data, those sensors must be combined. This work aims to assemble sensors and integrate them into a prototype that can obtain weather data parameters. The prototype is then used to get data through data obtaining process, so that it may be used to analyze the weather. This study created an integrated sensor prototype with Arduino as its microcontroller. Sensors such as DHT-11, wind speed sensor, and wind direction sensor are integrated so that they may capture parameters at the same time. To make the prototype easier to use, LCD display is used to show the data when the prototype is in use, and the data is also stored in SD card for analysis purposes. Parameters were taken in 2 locations, analyzed with tables and graph, and also compared with results of another study to see if the data makes sense. The prototype was successfully built and easy to use. The temperature difference is only 3.6-4.1 C, humidity difference being 1%, and the wind direction difference being 1.01 m/s. Considering weather-atlas taking data for the whole day as opposed to this prototype, the provided data makes sense.