G28 max end-stop issue

[AndrewDiehl]

I have my end-stops set up so X and X home to min values, and Z homes to it's max value

When I do a home to Z ( G28 Z) the Z axis homes correctly, but as soon as I issue any G command the Z axis immediately goes to Z=0 instead of staying put at Z=191.8

Also, if I home Z (max) and then home X and Y (min) the Z gets set to Z = 0 when it should be Z = 191.8 (in my case)

My End stop Settings if that helps:

Z_HOME_DIR = 1 (Max),
INVERT_Z_DIR = true,
Z_ENDSTOPS_INVERTING = false

[bkubicek]

a cheap workaround for now might be G28 Z119.8

[pnit]

I have this problem on my Y-Axis. Poking around the marlin.pde I found the following lines:

  if(code_seen(axis_codes[X_AXIS])) 
  {
    current_position[0]=code_value()+add_homeing[0];
  }

  if(code_seen(axis_codes[Y_AXIS])) {
    current_position[1]=code_value()+add_homeing[1];
  }

  if(code_seen(axis_codes[Z_AXIS])) {
    current_position[2]=code_value()+add_homeing[2];
  }

These really need to be aware of homing direction. I've never homed and set a position at the same time, so I just commented them out. Works fine.

[AndrewDiehl]

Looks like this is fixed in the latest release.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.