little oops

8 years ago · cafc48dff8
parent 471a321624
commit cafc48dff8
1 changed files with 2 additions and 2 deletions
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@ -5152,7 +5152,7 @@ inline void gcode_G28() {
        S2 += sq(z_at_pt[0]);
        N++;
        if (!pp_equals_1) // std dev from zero plane
-          for (uint8_t axis = 1; axis < 13; axis += (pp_equals_2 ? 4 : 2)) {
+          for (uint8_t axis = (probe_mode == -2 ? 3 : 1); axis < 13; axis += (pp_equals_2 ? 4 : 2)) {
            S1 += z_at_pt[axis];
            S2 += sq(z_at_pt[axis]);
            N++;