Nice small 3D printer in spe 
Originally shared by Raspberry Garden
Mini 3D printer using 4 DVD drivers, all hardware and software works well at last after long time trial, target is to control it by RPi finally. The extruder has not been applied yet.
Hardware: 4 DVD drivers, one for X, one for Y, two for Z; RAMPS 1.4 and Arduino Mega 2560 for stepper drivers
Firmware: Marlin
PC software: Repetier + Slic3r (looking for similar Raspberry Pi version)
The Reference:
