RepRap Prusa i3 bed auto-level

thingiverse

The extruder touches the bed and halts when the Z axis reaches its height. The Z_EndStopMount pieces are not fixed to the axis, allowing it to continue downwards until the circuit opens. This triggers the z-min, initiating auto leveling. Check out this video (https://www.youtube.com/watch?v=AOHPTKWP9wo) for a demo or download the model (http://www.thingiverse.com/thing:273805) for the Prusa_i3_X_End_Motor.stl file, which was copied from http://www.thingiverse.com/thing:39889/#files. To use these parts (AutoLevel_Z_EndStopMount.stl x1, LM8UU x1, Screws M3-15mm x1, Screws M3-5mm x1, Screws M2-8mm x2, Nut M3 x1, and Nut M5 x1), use an M5 nut to adjust the up/down movement of the end-stop-mount. Fix the M5 nut with an M3-5mm screw. The M3-15mm and M3 nut will grip the LM8UU in the center clamp. Use the original Z End-Stop micro switch as the detect switch, adjusting the touch screw of the X end motor mount to press the Z End-Stop Switch just before it hits the bed. Edit Marlin's "Bed Auto Leveling, grid mode" (https://github.com/ErikZalm/Marlin) by inverting your Z min end-stop setting (const bool Z_MIN_ENDSTOP_INVERTING = false), enabling auto leveling (#define ENABLE_AUTO_BED_LEVELING), and adjusting the probing grid points and offsets. Set the number of grid points per dimension to a maximum of 3, and define X_PROBE_OFFSET_FROM_EXTRUDER, Y_PROBE_OFFSET_FROM_EXTRUDER, and Z_PROBE_OFFSET_FROM_EXTRUDER as required. Burn Marlin into your RAMPS system, execute G codes for first level detection (G28 X, G28 Y, G28 Z, G29, G1 Z10, G1 X100 Y100), and check the Z offset by using an A4 paper on the print bed. Update the Z offset in Marlin and burn it into your RAMPS again. Finally, update "Ptr G-code -> Prefix" in KISSlicer and enjoy convenient auto bed leveling!