How to Setup BLTouch or 3DTouch Sensor for the Anet A8

bltouch-notes.md

• BLTouch setup notes:
  • this is essentially the procedure i used to setup my BLTouch sensor on my Anet A8
  • wired it up based on this: https://www.antclabs.com/wiring3 i spliced into the lcd cable
  • printed the mounting bracket found here: https://www.thingiverse.com/thing:2091529
  • installed marlin with the anet a8 configuration file they provide
  • modified the config to turn on BLTouch and used the other settings provided at the above thingiverse page
  • also had to enable a safe z homing setting and bilinear auto bed level
  • used the procedure in the thingiverse page above to get the probe z offset setting correct. although it actually took some other adjustment on top of that
  • in order to communicate and send gcode to the printer i used the arduino serial monitor with "Both NL & CR" option on and the baud set to 115200
  • using that arduino console thing saved my butt as i could much more easily make adjustments
  • keep in mind that some of the settings from the marlin configuration are DEFAULTS and the actual settings can be modified and stored in EEPROM, like the z offset and probe z offset
  • other thing i ran into was the nozzle being BELOW the triggering distance of the BLTouch, this (of course) causes the BLTouch to never trigger and the nozzle assembly to RAM ITSELF INTO THE BED IN A VERY SCARY FASHION. i ended up moving the hotend tube piece up a bit. but really, the BLTouch should be mounted a little lower i think