Z Probe Servo Mount for MakerFarm Prusa i3v for Auto Bed Leveling (HXT900)
UPDATE: Added longer version of Z probe for longer hot ends.
This replacement X carriage bracket and switch arm allow you to mount a servo-actuated Z probe to your MakerFarm Prusa i3v printer.
The Z probe serves two purposes: it registers the Z home off the glass (instead of the frame) and it allows the printer to probe in multiple locations and compensate for a bed that isn't perfectly level. Both require a newer version of the Marlin firmware. See details in the instructions.
There are several versions of this solution out there. I designed this one because I wanted to tuck the switch up tighter under the carriage when it wasn't deployed. This is only for aesthetics.
Note this part will not fit with the standard MakerFarm hot end fan shroud. It will fit with my improved Hexgon cooling system:
http://www.thingiverse.com/thing:335613
The bracket and switch arm are sized for the inexpensive and readily-available Hextronic HXT900 servo, available here:
http://www.hobbyking.com/hobbyking/store/RC_PRODUCT_SEARCH.asp?strSearch=HXT900
You can use the limit switch that came with the i3v kit. See the instructions for details.
NOTE: this probe arm was designed around the Hexagon hot end. If your hot end is longer, you may need to use a spacer to raise the extruder and hot end up off the mounting shelf to get enough clearance to use this Z probe.
Video of the servo probe in action: