An Outline of Fused Deposition Modeling: System Models and Control Strategies

Fused Deposition Modeling (FDM) is a type of Additive Manufacturing (AM) technology that becoming increasingly common in numerous applications thanks to its versatility and reduced material waste. However, the complex physical phenomena occurring during extrusion, including dynamics non-Newtonian fluids, viscoelastic behaviors rheology, make use heuristic observations preferable analytical approaches. Consequently, engineers have focused on optimizing materials hardware rather than control algorithms. The limited knowledge about extrusion deposition usually confines action motion printing head while keeping constant flow rate. Existing attempts synchronize consists open loop compensations, which, however, require identified transfer functions or need be tuned manually. This article aims compactly review FDM technologies from perspective by presenting (i) models (ii) strategies currently adopted industry.