Added a collar to the top piece of the piezo holder, so that you can install the bowden tube pneumatic connector there.

Printed the original, but am guessing that its meant for use with an original e3d v6 and/or Titan - it doesn't fit very well with my clone e3d v6 or my clone Titan extruder. As a workaround I have shimmed the neck with a small piece of sillicone.

My changes to Marlin configuration.h to get this to work :

• Uncomment //#define SN04

• Uncomment //#define BILINEAR

• Uncomment //#define DELAY_BEFORE_PROBING 200 - without this the sensor would trigger while it was moving to the probe position

• Change #define HOMING_FEEDRATE_XY 1500 - was moving too fast

• Change #define HOMING_FEEDRATE_Z 800 - needs to be fast enough for the "hit" to register, but not too fast that it triggers the piezo, YMMV

• Change #define Z_PROBE_SPEED_SLOW Z_PROBE_SPEED_FAST - I've set both these variables to the same value, I noticed that the second probe was too slow - piezo didn't trigger

After these firmware changes, G29 needs to be added after G28 (Home all axis) to your slicer start Gcode

Tevo Tarantula

No

No

0.2mm

50% at least

Collar is not a smooth cylinder, I decreased the number of facets so that there would be more area for the threads of the pneumatic connector to grip.