Lulzbot TAZ retractable Z-probe auto bed level compensation with G29 Mod by 1013

Last crawled date: 2 years, 11 months ago

This mod makes manually leveling the build bed a thing of the past.This is for Advanced users only, Firmware and hardware modification is required and likely will affect any warranty on the machine. This also reduces your X printable area by about 8mm, at the max X position.
video's of the prototype in action:
deployment: http://youtu.be/tMdS1dXkoAc
printing with Z motion http://youtu.be/c8dM1KpBXJ8
Inspired by this: https://www.matterhackers.com/news/automatic-printer-calibration-update
The Z-probe is a micro-switch wired up in parallel with the existing Z min switch and attached to a cam operated toggle. The probe is deployed when the X-carriage goes to the max X position, and retraced when the carriage goes to X0. This allows for automatic bed probing before each print.
NOTE: this is designed to work with TAZ's that have my stiffened X motor and bearing mounts. http://www.thingiverse.com/thing:107553 It can work with standard TAZ parts but may require a custom 8mm spacer on the lower X smooth rod since the probe is activated by pushing against these parts.
It is also recommended and probably necessary to remove the Z-backlash that is in the standard TAZ by following the instructions in this mod: http://www.thingiverse.com/thing:117950
BED PROBEING FIRMWARE:https://github.com/larsbrubaker/Marlin/tree/Auto_Bed_Level
Lulzbot TAZ specific configuration.h file:
COMING SOON
G-code for probe deployment and bed probing:
COMING SOON