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This study aims to develop a portable CNC welding machine prototype using the Gas Metal Arc Welding (GMAW) method as a Teaching Aid (ABBM) to enhance the effectiveness of teaching and learning (PdP) in welding. The prototype is specifically designed for technical and vocational education institutions, providing students with the opportunity to learn automated welding technology in a more practical and interactive environment. The machine design emphasizes portability, user-friendliness, safety, and operational efficiency to overcome the limitations of conventional welding
machines, which are not portable, require high maintenance costs, and are difficult to operate. The development of this prototype involves three main phases: design, assembly, and quality evaluation, and it is controlled using an Arduino Mega 2560 and RAMPS 1.4 system, equipped with stepper motors, a servo motor, and Marlin firmware to ensure precision and stability during operation. The findings indicate that this prototype was positively received by expert panels who evaluated its design suitability, development, and usability. Feedback from experts suggests that this portable CNC welding machine facilitates automated welding learning, enhances students' understanding of CNC technology, and reduces training and maintenance costs for welding equipment. Additionally, safety and ease of operation were highly
rated, although some technical improvements were suggested to further enhance system effectiveness. In conclusion, the integration of modern technology and innovative design in developing this machine demonstrates its potential as a relevant and effective ABBM model in technical education. This study is expected to serve as a foundation for further development in the use of automation technology to improve the efficiency and effectiveness of welding training in educational institutions.