This paper presents the results of a study evaluating the effectiveness of a virtual reality (VR) application in preparing users for technical and operational procedures related to the operation of 3D printers. The VR simulation provides an immersive environment where users can safely practice key operations without the risk of damaging equipment or wasting materials. The study involved two groups: young engineers and experts in additive manufacturing technology. Participants performed tasks related to 3D printing and then evaluated the application in terms of usability and training effectiveness. The results indicate that the VR application received high ratings for realism, procedural accuracy, and its impact on operational safety. Experts appreciated its potential for process standardization, while engineers emphasized the intuitiveness of the interface and the interactivity of the VR environment. Challenges were also identified, particularly regarding navigation in the interface, material selection, and interaction with objects in the virtual environment. Users suggested improvements in visual guidance, better material differentiation, and enhanced procedural descriptions.