Auto Bed Leveling?

My auto bed leveling doesn't seem to work. The printer goes through the motions of auto bed leveling before each print, but the bed is just a little unlevel in spots. In the high spots on the first layer no filament comes out of the hotend because it's to close to the bed. I also hear a clicking sound when this happens. Any ideas on what to troubleshoot to fix this?

 

I use an E3D hotend and made this:
http://community.robo3d.com/index.php?threads/cheap-easy-dial-gauge.24214/

You can pretty much adapt this to any hotend. The key is to clamp a cheap dial indicator to the hotend or print head and then level to the gauge. The bed on the R2 bends kind of easy but with some practice you can level to .02mm.

 

If you could do two things really quick I may be able to help.

First. Type in this sequence on octoprint (wait for each command to finish executing before entering the next one):

G28
G35
M48

It should print out some stats. If you could post what it gives for mean, range, and standard deviation it will help identify whether its a problem with the sensor.

After that type in G29. Then type in M420 V0. It will give a 3x3 array of numbers. If you could post that as well it may help identify the problem.