3D Printer based on discarded CD drives. The project is more or less copied from http://www.instructables.com/id/eWaste-60-3DPrinter/

1. 2 stepper motor based CD drives.
2. 1 DC motor based CD drive.
3. 1 stepper motor based extruder.
4. Chasis made with wood.

1. Teensy LC
2. Pololu 8843 drivers for stepper motors
3. L293D for DC motors
4. SMPS power supply

1. Teensy template at http://github.com/apmorton/teensy-template
2. Python HID module at https://pypi.python.org/pypi/hid

1. Even though two stepper motors and one DC motor with encoder has been used, it is easy to replace the DC motor with stepper motor. On the firmware side, have a look at X axis or Y axis controls. The same would apply to a third axis as well.