Gelstronic made this ultra low cost project from recycled junk computer parts. He is not the first but it is the best documented project. It can cost under 100 USD. Kudos G!
Features and technical specifications:
- Fused deposition modeling ABS/PLA
- Heat bed
- use of open source firmware, modified version of Tonokip
- free host software, Repetier-Host
- bowden-extruder
- max. build size 40mm x 40mm x 40mm
- resolution 0.08mm
Bought parts:
- Arduino Board Mega 2560 (on ebay from china): 10 Euro
- 2 pcs. Stackable Motor Driver Shield L293D 6 Euro
- Hotend MK7 MK8 noozle 0,4mm + thermistor + cartridge 20 Euro
- PTFE Tube 4 x 2mm & 2 pcs. 1/8" BSP 6 Euro
- Fan 30mm x 30mm 2 Euro
- MOSFETs,resistors,caps,LEDs,thermistor 5 Euro
- 4 pcs. DVD/Blu-ray drives, with stepper motors ! old cd drives can't be used because they work with dc-motors
- old PC power supply, 12V/5A and 5V/2A are required
- stepper motor nema17-like from old printer for extruder
- modified gear from an old hp printer for the bowden-extruder, optional you could get an airtripper extruder for about 25 Euro
- many screws, nuts and washers M3, M4, M5
- lots of wires
- aluminium-sheet for the frame, you can also use wood
- some aluminum / metal profiles
Construction manual and all the files can be found at:
http://www.instructables.com/id/Poor-Mans-3D-Printer/?ALLSTEPS
Similar project, but the 3d printer is in Delta configuration made from paper printer and flatbed scanner and frame is from wood:
http://diy3dprinting.blogspot.com/2014/05/hot-to-build-diy-delta-from-junk-matrix.html
or even laser engraver made from DVD drives: http://diy3dprinting.blogspot.com/2014/03/engravr-simple-raspi-powered-laser.html
and don't forget the w.afate project from Africa
great times people ... repair, recycle, upcycle and above all Do-It-Yourself ... Peace