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The rapid prototyping is growing increasingly as an option in the quest to reduce the time and risks in the process of developing products. However, the modeling of parts produced by fused deposition modeling (FDM) can vary in roughness and dimensional accuracy, depending on a few parameters. The literature has plenty of works such as to manifold others rapid prototyping technologies, but the same is not true with the FDM. Therefore, this research seeks to analyze the dimensional and surface quality of parts processed by FDM technology, through an experimental design. According to the data analyzed, it was possible to say that some variables selected as main factor, or the interaction between them, had an effect on the roughness response and no effect on the accuracy dimensional response. It is concluded that to produce prototypes where the surface finish is important, care must be taken in specifying the machine parameters, since the roughness of the parts processed will depend strongly on the interaction between these parameters. Key-words: Rapid prototyping. Fused deposition modeling. FDM. Surface quality. Structural quality. Revista Produção Online v.10, n.3, set. 2010 ISSN: 1676 1901 www.producaoonline.org.br

Análise da qualidade superficial e dimensional em peças produzidas por modelagem por deposição de material fundido (FDM)