TEVO TARANTULA AUTO BED LEVELLING - E3Dv6

thingiverse

Auto Bed Levelling for the TEVO TARANTULA with the popular LJ12A3-4-Z/BX-5V from eBay. Print with the large flat section facing down on the bed. No more servos, no more touch probes!! I designed this carriage because I was tired of having to level the bed almost every print. It uses three rollers instead of the standard four. The carriage sits nice and square now, and you only have one eccentric nut to worry about - it's much easier. I've also included a small recess for the X limit switch bolt heads so that they no longer drag along the X axis. I've used the proximity sensor with the part number listed above, but the standard one that works from six to thirty volts will also fit in this carriage, just be sure to add a voltage divider before wiring it up - there are plenty of videos on YouTube if you don't know how to make a voltage divider. Firmware attached in the .zip file is the Marlin firmware that I'm currently using in my Tevo. There have been some notes added through the 'Configuration.h' file with regards to the settings that I've changed, so be sure to check them out and adjust as needed - just open the ALBATRONic.ino (I know, I know...) file and you'll be good to go. The big one will be the Z probe height, which is currently set at four millimeters. So if you set the nozzle against the bed and have the probe four millimeters above the nozzle, you should be good to go. (I've actually set my nozzle half a millimeter above the nozzle so that it can probe through three-millimeter glass when I print ABS - there's a note in the Configuration.h file that points out the appropriate height setting to change, just make sure you double-check it before you start printing - this is awesome bed level mode, but you will probably crash and that sucks....) Once the firmware is uploaded, you can either select Bed Levelling through the menu on the LCD screen before your print or alter your slicer settings to include these two lines at the start of your print! "G28 X0 Y0" // home x & y axis "G29" // perform bed mesh levelling before the print As always, this is open-source firmware and I take no credit for its development - just be sure to check out the original walkthrough by ArcadEd if you're unsure about anything. UPDATE 14-2: I've altered some dimensions with the original STL because it was brought to my attention that the proximity sensor mount can interfere with the X gantry extrusion. If you like it, drop us a few bucks and don't forget to post your "I made one" photos. Enjoy!