_LINEAR_EXIT restore_z to z0 Fix - #46
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Aug 23, 2026
| {% set tp = printer["gcode_macro TOOL_POSITIONS"] %} | ||
| {% set c = printer["gcode_macro _INDX_CONSTANTS"] %} | ||
| {% set restore_z = params.RESTORE_Z|default("")|string %} | ||
| {% set restore_z = params.RESTORE_Z|default(0)|float %} |
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If you press T(n) from an un-homed state with a homing override macro that uses
SET_KINEMATIC_POSITION Z=0in any way to lift the toolhead before G28 homing, line 352 of the current index-tc-macros.cfg can potentially set therestore_zposition to 0.000 when theCHANGE_TOOLmacro evaluates. See photo.add
M118 restore_z saw {restore_z}mmafter line 352 to test.This will then proceed to lower the nozzle to the bed (Z0) after the
_LINEAR_EXITmacro completes. As the current line 239 sees 0.00 as not "" so passes that command ofG0 Z0.000to the_TC_G0macro for execution - but can't tell if it's potentially destructive or not.This way if
restore_zis passed as 0.000 it is simply not actioned as this outcome is obviously undesirable.