How to Design and Build a 3D Printer : 10 Steps (with Pictures) - Instructables
ATOM 3D Provides Instructables Tutorial to Make Low-cost, Simple, DIY, 3D Printer Extruder - 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing | 3d printer extruder, 3d printer diy, 3d printer
Build and Improve a 3D Printer : 64 Steps (with Pictures) - Instructables