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Additive manufacturing is used in multiple industries to create prototypes, visual models and objects with complex geometries. Being able to fabricate an object layer by layer, additive manufacturing offers the possibility to create objects with embedded, non-assembly joints. With Fused Deposition Modeling (FDM), one of the most common and accessible 3D printing processes, minimizing joint clearance for models with non-assembly joints presents a challenge, especially in the case of consumer-grade desktop machines....

This paper presents an original approach on developing and testing an extruder for paste-like materials for conventional 3D printers based on Fused Deposition Modeling (FDM) technology. The main advantage of such technology is that it allows the final product to be modified / altered after fabrication i.e. either to correct printing irregularities or simply give it another design form. The material is fed into the extrusion nozzle via a plastic cylinder driven by an electric actuator. Various extruding nozzles wer...

This paper presents an approach of using Augmented Reality (RA) technology for operator training in quality inspection of various large sized metallic products such as pipes, weldings, metal sheets, etc. An Android software application has been developed and implemented using Unity 3D Software Development Package(TM). The proposed application simulates the use of various ultrasonic sensors/probes to train human operators without the need to use the actual expensive inspection equipment. The user manipulates a 3D p...