Fused Deposition Modeling (FDM)

The technology was developed by S. Scott Crump, Stratasys in Eden Prairie,  in the late 1980s.


FDM works on an “additive” principle by laying down material in layers. A plastic filament or metal wire is unwound from a coil and supplies material to an extrusion nozzle which can turn the flow on and off. The nozzle is heated to melt the material and can be moved in both horizontal and vertical directions by a numerically controlled mechanism, directly controlled by a computer-aided manufacturing (CAM) software package. The model or part is produced by extruding small beads of thermoplastic material to form layers as the material hardens immediately after extrusion from the nozzle. Stepper motors or servo motors are typically employed to move the extrusion head. A range of materials are available including ABS, polyamide, polycarbonate, polyethylene, polypropylene, and investment casting wax.


The term fused deposition modeling and its abbreviation to FDM are trademarked by Stratasys Inc. The exactly equivalent term, fused filament fabrication(FFF), was coined by the members of the RepRap project to give a phrase that would be legally unconstrained in its use.


Fused Deposition Modeling (FDM) Video


Fused Deposition Modeling

Source: www.custompartnet.com 















Abbreviation: FDM
Material type: Solid (Filaments)
Materials: Thermoplastics such as ABS, Polycarbonate, and Polyphenylsulfone; Elastomers
Max part size: 36.00 x 24.00 x 36.00 in.
Min feature size: 0.005 in.
Min layer thickness: 0.0050 in.
Tolerance: 0.0050 in.
Surface finish: Rough
Build speed: Slow
Applications: Form/fit testing, Functional testing, Rapid tooling patterns, Small detailed parts, Presentation models, Patient and food applications, High heat applications





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