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It's free to download
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Documentation
Technical
- PLA Filament
- NEMA23 Motor (preferably with axle out both sides)
- M5 x 30mm
- M5 Nuts
- 4mm OD quick release tubing connector
- 608 Skate bearing
- Hobbed pulley (0.5"/12mm OD) (http://www.reprapdiscount.com/mechanics/52-hobbed-pulley.html)
- 1/4 OD x 1.25" spring (http://www.mcmaster.com/#9657k106/=sju6jh)
Free