FDM or Fused Deposition Modeling is said to be one type of afree-form fabrication technologies being developed Stratasys Inc.As this technology utilizes high force ABC plastic it is one of themost preferred technologies for prototyping plastic parts whichrequire force. The Fused Deposition Modeling is a method of layeredmanufacturing which extrudes a very thin drop of plastic, just onelayer at a time. A string of plastic is supplied into an extrusioncranium where this string is heated into a state of semi-liquidform and then extruded via a very tiny passage onto the other layerof the substance. Support substance is even being laid down in thesame method. How it Works? FDM is also said to be a solid based rapid prototypemethod which extrudes substances to build a model layer by layer.FDM is also the second most extensively utilized technology ofrapid prototyping after SLA or Stereolithography. Actually, aplastic string is being released from a coil and then providessubstances to an extrusion syringe. This syringe is then heated tomelt the stored plastic it also has a mechanism that allows theflow of the melted plastic to turn on and off when required. Thissyringe is later mounted to a mechanical phase that can be shiftedboth in vertical and horizontal directions.