Fused-Deposition-Modeling 3D printer

Abstract

3D printer is a machine used to make three dimensional solid objects from a CAD “Computer Aided Design” models using additive manufacturing process where designed object divides into small layers then prints layer over layer. FDM “Fused-Deposition- Modeling” 3D printers uses a PLA thermoplastic filament, which is heated to its melting point then extruded on a heated plate through a nozzle. The printer mechanism is based on Cartesian robot style which moves an independent linear motion in each of 3 axes (X, Y and Z) to print the desired shape. Printing process starts by converting CAD design into layers (slicing) then generates G-code instructions using specific software after that, the Gcode instructions will be transferred to 3D printers’ microcontroller which drives the actuators according to these instructions to print the desired model. The printer motion is an open loop system without feedback control. The heat of the extruder and heated plate controls using software PID controller. The aim of this project is to build and implementation a first FDM 3D printer in Palestine Polytechnic University, additionally trying to add some features such as wireless printing capability and fault detection system. The printer