Just finished working on auto bed leveling. Results are awesome 
Originally shared by Pavel Karoukin
https://www.youtube.com/watch?v=75gnpxIZiWI&feature=autoshare
Thanks for sharing Pavel. I own a TAZ 4 and have thought about adding this feature as well. I wonder though if it just complicates things. What I mean by that is now you have your X,Y & Z access moving at all times to complete 1 layer of the print. It does seem to be a lot more convenient but I’m not sure if I would want to add the extra overhead of moving the Z access to. I rarely have to recalibrate my bed once it is set.
How have some of your taller prints turned out?
Again thanks for sharing!
I print quite a bit and i had to correct bed level quite a few times already. This is in part might be due using hair spray as a adhesive for first layer.
I wouldn’t expect Z axis motor to get any significant wear from this gradual adjustment. Nothing tall in the pipeline yet. Usually once first layer is perfect (which it is with auto bed leveling) - the rest of the part will be good.
As for how complicated it is - I am going to write an blog post, but essentially it is couple plastic parts printed, one servo from ebay and some wires to extend/route to the control module. It took me quite some time, but a lot of it was due fighting glitchy firmware. In the end I used latest Marlin release directly, adjusted all the variables for Lulzbot and it worked pretty good since then. I will release Marlin firmware I am using on github (it is already there, just not clean and not in separate repo)
Very nice thanks for the post.
How you do that ?? 
i have a prusai3 i can use this?
For Prusa I3 there is series of blog posts. Start here - http://zennmaster.com/random-things/auto-bed-leveling-for-the-makerfarm-prusa-i3-part-1-assembly-and-basic-setup
Lookin good. You might consider securing the switch wiring to the swivel arm so as to not risk pulling out the connectors.
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