Spool Roller for aluminum extrusion 2020 printers

Spool roller system that's adjustable, won't topple over, and easy to install on a printer using aluminum extrusion 2020/open beam frame.

This spool roller is used on my reprap, Aluminum 3DPrintMi and works great. The filament guide is setup to pull the filament in a single direction to prevent the spool from toppling over from the extruder pulling on the filament. Can be adjusted for different sized spools by simply moving one end of the roller to the correct distance.

Aluminum 3DPrintMi
http://www.thingiverse.com/thing:825277

• PDF provides the BOM needed to assemble
• 2mm ID x 4mm OD teflon tube
  http://www.robotdigg.com/product/133/PTFE+filament+tubing+10+meters
• Can substitute 608ZZ Flanged Bearing with printed 608 idler pulleys
  http://www.thingiverse.com/search?q=608+pulley&sa=