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Mechanical Endstops for Z Axis Alignment

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IMBalENce

@IMBalENce_269080

Remix of the Ender 3 sensorless homing spacer

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Views: 246
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Updated at source: Apr 14, 2023

Model information

Source: Printables
Category: Other Printer Parts & Upgrades
License: Creative Commons — Attribution — Noncommercial

Details Files (1)Makes & comments (Makes: 0) (Comments: 0)Remixes (0)Collections (2)

Remix of the original Ender 3 sensorless homing spacer for V roller gantry by @willsside

Added electric wire slot to accommodate my in-frame LED strip mod connection.
Adjusted the length to accommodate my z-axis lead screw anti-backlash POM nut mod (this reduced my Z range to about 215mm, but improves reliability)

Below is my working macro for mechanical gantry calibration (sensorless z-homing) in Klipper

[gcode_macro MECH_GANTRY_CALIBR]
gcode:
  {% set z_max = printer.configfile.settings.stepper_z.position_max %}
  {% set oldcurrent = printer.configfile.settings["tmc2209 stepper_z"].run_current %} ; TODO: Find runtime current settings
  G28
  G90
  G0 X110 Y110 F8000
  G0 Z205 F720 ; 12*60
  SET_TMC_CURRENT STEPPER=stepper_z CURRENT=0.28
  G4 P200
  SET_KINEMATIC_POSITION Z=0 ; Fake Z position to allow move further
  G0 Z13 F360
  SET_TMC_CURRENT STEPPER=stepper_z CURRENT={oldcurrent}
  G4 P200
  G0 Z0 F360
  SET_KINEMATIC_POSITION Z=205 ; Set Z-pos back (otherwise it would try to do z-hop and it is too high for that)
  G28

Mechanical Endstops for Z Axis Alignment

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