Re: When homing, z bed moves down before going up, crashing into brackets

Quote
PDBeal
Depending on what version your currently doing it sort of changes, but if you look in Marlin_main.cpp and search for "void gcode_G28()" That is the routine that handles homing. And if you skim through it until you see something similar to the following:

      if (home_all_axis || homeX || homeY) {
        // Raise Z before homing any other axes and z is not already high enough (never lower z)
        destination[Z_AXIS] = LOGICAL_Z_POSITION(Z_HOMING_HEIGHT);
        if (destination[Z_AXIS] > current_position[Z_AXIS]) {

          #if ENABLED(DEBUG_LEVELING_FEATURE)
            if (DEBUGGING(LEVELING)) {
              SERIAL_ECHOPAIR("Raise Z (before homing) to ", destination[Z_AXIS]);
              SERIAL_EOL;
            }
          #endif

          do_blocking_move_to_z(destination[Z_AXIS]);
        }
      }

That was the section I commented out at one time from the RCBugFix-RC7 version. It was different in the RCBugFix-RC6 version, so it might not look exactly like that depending on what version your using.

There might be another location to look too, but I don't remember if it was just the one section.