Bed Auto Leveling for Prusa i3 with J-head

A new method of Bed leveling is released in:
http://www.thingiverse.com/thing:273805
This method is easier and much more accurate. Please give up this old one.

Use SG-90 Servo

Please read the "Instructions for configuring Bed Auto Leveling" of Marlin Firmware first.
https://github.com/ErikZalm/Marlin

Or watch this video.
http://www.youtube.com/watch?v=x8eqSQNAyro

My work
https://m.youtube.com/watch?v=Dqq6X0cpX0Q

(2013/12/22) Update model autoLevelJheadMount_v3.stl to fix up the broken surface.