The principle of Fused Deposition Modeling is simple. You can compare it with a hot glue gun in which you put sticks of glue. The glue is heated up to the temperature that it melts and pushed through a fine nozzle in the front of the glue gun.
In an FDM printer, no glue is used but a long plastic wire as basic material. It is fed by a spool to the nozzle where the material is also liquefied and 'drawn' on the platform where it immediately becomes hard again. The nozzle is steered in the X-Y direction to drop the material at the correct location, drawing your model line by line. After a layer is drawn, the platform lowers by one layer thickness so the printer can start with the next layer. When your model contains overhanging sections, the printer needs to build supporting material. Since the material of the model cannot be deposited in the air, the support material prevents it from falling down. This support material is fed through another nozzle. Afterwards when the model is put into a bath with special soap, the support material dissolves.
wonderfull!
nishandhAzhikode 10 months ago