MendelMax 1.5+ Y-ais Internal Idler Tensioner

Inspired by Prusa i3 idler. This is a match for my internal motor mount (http://www.thingiverse.com/thing:186076) and belt mount (http://www.thingiverse.com/thing:41571). All together they make a completely internal Y-axis.

See instructions for assembly and hardware required. Once assembled you can tighten the belt just by turning the adjustment screw clockwise, up to ~15 mm of adjustment possible.

Note: I have a sized up machine with a sized up bed, this works fine for me and does not